CN102354160A - CNC machine tool feedback signal conversion device and CNC machine tool control system - Google Patents
CNC machine tool feedback signal conversion device and CNC machine tool control system Download PDFInfo
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Abstract
The invention discloses a CNC (computer numerical control) machine tool feedback signal conversion device and a CNC machine tool control system. The device comprises a branch circuit and a comparison apparatus, one end of the branch circuit connects with a first reference voltage, and the other end of the branch circuit is in grounding. The branch circuit is used for carrying out voltage dividing on the first reference voltage and outputting a first voltage and a second voltage. The comparison apparatus comprises a first voltage input terminal, a second voltage input terminal and a CNC machine tool feedback signal input terminal, and is used for comparing a feedback signal with the first voltage and the second voltage respectively and outputting a feedback signal to a CNC control unit according to a comparison result. The invention provides the CNC machine tool feedback signal conversion device and the machine tool control system, and provides a circuit form to carry out conversion on different numerical control machine tool feedback signal levels, an easily appeared error phenomenon by employing a PNP, NPN or mixing conversion plate in the prior art is eliminated, simplicity of feedback signal level conversion is realized, and productivity is raised.
Description
Technical field
The present invention relates to a kind of chromacoder and control system, particularly a kind of CNC (computer numerical control) machine feedback chromacoder and control system.
Background technology
At present; The CNC lathe has been widely applied to the industrial processes field, and in the CNC digital control system course of work, control system need be gathered the feedback signal of lathe or automation equipment; Judging the running status of lathe or automation equipment, and then lathe or automation equipment are controlled.Usually, lathe or automation equipment feedback signal have common 24V end and hold (or 0V holds altogether) two kinds of forms altogether.Such as; When feedback signal terminal is connected to common 24V end or is total to the 0V end; The feedback signal change-over panel should produce low level and flow to the CNC digital control system, and when feedback signal terminal was not connected to common 24V end or the 0V end is unsettled altogether, the feedback signal change-over panel should produce high level and flow to the CNC digital control system.Realize in the prior art that above-mentioned level conversion has two kinds of change-over circuits, feedback signal adopts when 24V holds altogether need connect the PNP change-over circuit, and feedback signal adopts need connect the NPN change-over circuit when holding altogether.
In research and practice process to prior art; The present inventor finds; In the above-mentioned prior art: lathe or automation equipment often have a large amount of feedback signals; Adopt a large amount of corresponding PNP change-over circuit or NPN change-over circuit; Can make circuit structure complicated; Connect loaded down with trivial detailsly, be easy to make mistakes.
Summary of the invention
In order to solve in the prior art CNC lathe or automation equipment has a large amount of feedback signals and adopt a large amount of corresponding PNP change-over circuit or NPN change-over circuit to make the circuit structure complicated problems, a kind of CNC machine feedback chromacoder and CNC machine tool control system are provided
The present invention provides a kind of CNC machine feedback chromacoder; Comprise: bleeder circuit and comparison means; Said bleeder circuit one end connects first reference voltage, other end ground connection, and said bleeder circuit is used for output first voltage and second voltage after the first reference voltage dividing potential drop;
Said comparison means comprises first voltage input end, second voltage input end and CNC machine feedback signal input part; Be used for feedback signal is compared with first voltage and second voltage respectively, and give according to comparative result to CNC control module output feedback signal.
The present invention also provides a kind of CNC machine tool control system, comprises above-mentioned CNC machine feedback chromacoder, and said CNC machine feedback chromacoder is connected with control module respectively, is used for to the control module output feedback signal.
The present invention provides a kind of CNC machine feedback chromacoder and machine tool control system; Numerically-controlled machine feedback signal level to multi-form provides a kind of circuit form to change; Eliminate available technology adopting PNP, NPN or mixing change-over panel and very easily obscured the phenomenon of makeing mistakes; Realize the simplicity of feedback signal level conversion form; Improved throughput rate, also made Installation and Debugging more quick simultaneously.
Description of drawings
In order to be illustrated more clearly in the technical scheme in the embodiment of the invention; The accompanying drawing of required use is done to introduce simply in will describing embodiment below; Obviously; Accompanying drawing in describing below only is some embodiments of the present invention; For those of ordinary skills; Under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.Wherein
Fig. 1 has shown the embodiment of the invention one and embodiment two CNC machine feedback chromacoder structural representations;
Fig. 2 has shown the embodiment of the invention one CNC machine feedback chromacoder circuit diagram;
Fig. 3 has shown the embodiment of the invention two CNC machine feedback chromacoder circuit diagrams;
Fig. 4 has shown the embodiment of the invention three and embodiment four CNC machine feedback chromacoder structural representations;
Fig. 5 has shown the embodiment of the invention three CNC machine feedback chromacoder circuit diagrams;
Fig. 6 has shown the embodiment of the invention four CNC machine feedback chromacoder circuit diagrams;
Fig. 7 has shown the embodiment of the invention five CNC machine feedback chromacoder structural representations;
Fig. 8 has shown the embodiment of the invention five CNC machine feedback chromacoder circuit diagrams;
Fig. 9 has shown the embodiment of the invention six CNC machine feedback chromacoder structural representations;
Figure 10 has shown the embodiment of the invention six CNC machine feedback chromacoder circuit diagrams;
Figure 11 has shown the embodiment of the invention seven CNC machine tool control system structural representations.
Embodiment
To combine the accompanying drawing in the embodiment of the invention below, the technical scheme in the embodiment of the invention is carried out clear, intactly description, obviously, described embodiment only is a part of embodiment of the present invention, rather than whole embodiment.Based on the embodiment among the present invention, those of ordinary skills are not making the every other embodiment that is obtained under the creative work prerequisite, all belong to the scope of the present invention's protection.
First embodiment of the invention provides a kind of CNC machine feedback chromacoder; As depicted in figs. 1 and 2; Comprise: bleeder circuit 1 and comparison means 2; Said bleeder circuit 1 one ends connect first reference voltage; Other end ground connection, said bleeder circuit are used for output first voltage and second voltage after the first reference voltage dividing potential drop; Said comparison means 2 comprises first voltage input end, second voltage input end and CNC machine feedback signal input part; Be used for feedback signal is compared with first voltage and second voltage respectively, and give according to comparative result to CNC control module output feedback signal.
Said comparison means 2 comprises the first comparer U1, the second comparer U2 and pull-up resistor R3; The said first comparer U1 is provided with first voltage input end and CNC machine feedback signal input part; The said second comparer U2 is provided with second voltage input end and CNC machine feedback signal input part; Said pull-up resistor R3 one end connects first reference voltage; The other end connects the output terminal of the said first comparer U1, and the output terminal of the said first comparer U1 and the second comparer U2 links together.
The input end in the same way of the said first comparer U1 is first voltage input end; The reverse input end of the said second comparer U2 is second voltage input end, and the input end in the same way of the reverse input end of the said first comparer U1 and the second comparer U2 is CNC machine feedback signal input part.The power end of said first comparer U1 and the said second comparer U2 is connected first reference voltage respectively, earth terminal ground connection.
Said bleeder circuit 1 comprises: first sectional pressure element, and an end connects first reference voltage, and the other end is exported the first voltage V1; Second sectional pressure element, an end connect the end that first sectional pressure element is exported the first voltage V1, and the other end is exported the second voltage V2; The 3rd sectional pressure element, an end connect the end that second sectional pressure element is exported second voltage, other end ground connection.
Said first sectional pressure element is that first resistance R, 2, the second sectional pressure elements are that second resistance R, 4, the three sectional pressure elements are the 3rd resistance R 6.Said first resistance, second resistance and the 3rd resistance can be fixed resistance, also can be variable resistor, as long as play the dividing potential drop effect.
The CNC control module through analyze feedback signal judge lathe or each position duty of automation equipment with and the correctness of operation, and then to its control.Usually numerically-controlled machine or automation equipment feedback signal have two kinds of forms, are respectively common 24V and altogether.So-called 24V altogether when promptly lathe or automation equipment have feedback signal to come, shows as switch level 24V and is loaded into V0 end shown in Figure 2 in Fig. 2; Be lathe or automation equipment when having feedback signal to come altogether, V0 is held with terminating to.Altogether 24V with generally be to control altogether by relay or other switches, when not having feedback signal to come, relay or switch are in disconnection (or unsettled) state.Said first datum can be elected 24V as.
Principle of work of the present invention is: when feedback signal is 24V or 0V; Be when feedback signal terminal is connected to common 24V end or 0V holds altogether; CNC machine feedback chromacoder produces low level (or level "0") and flows to the CNC digital control system; When feedback signal terminal was not connected to common 24V end or is total to the 0V end, CNC machine feedback chromacoder produced high level (or level"1") and flows to the CNC digital control system.For realizing this function, the present invention adopts two limit comparator circuits, as shown in Figure 2.Wherein U1, U2 are two comparers, adopt the 24V power supply respectively.U1, U2 form two limit comparator circuits, and the input end in the same way of U1 is set to upper voltage limit V1, and the reverse input end of U2 is set to lower voltage limit V2, and the input end in the same way of the reverse input end of U1 and U2 links to each other, as the input end of feedback signal Vi n.U1, U2 output adopt " with " connected mode link to each other.Wherein resistance R 2, R4 and R6 form bleeder circuit, and R2 and R4, R6 are the upper voltage limit V1 and the lower voltage limit V2 of two limit comparator circuits with the 24V dividing potential drop.
When lathe or automation equipment output feedback signal during for 24V end altogether; 24V is loaded into the V0 end; Through the resistance value of R2 in the bleeder circuit, R4 and R6 is set; Make V0 greater than V1, V0 is greater than V2, and this moment, comparer U1 was output as low level; U2 is output as high level; Since U1, U2 adopt " with " mode be connected, so the output of double-limit comparator shows as low level, low level is input to CNC control center FEEDBACK CONTROL end; When lathe or automation equipment output feedback signal altogether the time, V0 terminates to ground, and this moment, comparer U1 was output as high level, and U2 is output as low level, and said double-limit comparator shows as low level output, and low level is input to CNC control center FEEDBACK CONTROL end.
Another kind of embodiment; Also comprise reverser, said reverser connects the output terminal of said comparison means, and said reverser can be elected the not gate device as; Be used for the high level of comparison means output is become low level or low level is become high level, to satisfy the demand of different control units.
First embodiment of the invention provides a kind of CNC machine feedback chromacoder; Numerically-controlled machine feedback signal level to multi-form provides a kind of circuit form to change; Eliminate available technology adopting PNP, NPN or mixing change-over panel and very easily obscured the phenomenon of makeing mistakes; Realize the simplicity of feedback signal level conversion form; Improved throughput rate, also made Installation and Debugging more quick simultaneously.
Second embodiment of the invention provides a kind of CNC machine feedback chromacoder; As shown in figures 1 and 3; Comprise: bleeder circuit 1 and comparison means 2; Said bleeder circuit 1 one ends connect first reference voltage; Other end ground connection, said bleeder circuit are used for output first voltage and second voltage after the first reference voltage dividing potential drop; Said comparison means 2 comprises first voltage input end, second voltage input end and CNC machine feedback signal input part; Be used for feedback signal is compared with first voltage and second voltage respectively, and give according to comparative result to CNC control module output feedback signal.
Said comparison means 2 comprises the first operational amplifier U3 and the second operational amplifier U4; The said first operational amplifier U3 is provided with first voltage input end and CNC machine feedback signal input part; The said second operational amplifier U4 is provided with second voltage input end and CNC machine feedback signal input part, and the output terminal of the said first operational amplifier U3 and the second operational amplifier U4 links together.
The input end in the same way of the said first operational amplifier U3 is first voltage input end; The reverse input end of the said second operational amplifier U4 is second voltage input end, and the input end in the same way of the reverse input end of the said first operational amplifier U3 and the second operational amplifier U4 is CNC machine feedback signal input part.The power end of said first operational amplifier U3 and the said second operational amplifier U4 is connected first reference voltage respectively, earth terminal ground connection.
Said bleeder circuit 1 comprises: first sectional pressure element, and an end connects first reference voltage, and the other end is exported the first voltage V1; Second sectional pressure element, an end connect the end that first sectional pressure element is exported the first voltage V1, and the other end is exported the second voltage V2; The 3rd sectional pressure element, an end connect the end that second sectional pressure element is exported second voltage, other end ground connection.
Said first sectional pressure element is that first resistance R, 2, the second sectional pressure elements are that second resistance R, 4, the three sectional pressure elements are the 3rd resistance R 6.Said first resistance, second resistance and the 3rd resistance can be fixed resistance, also can be variable resistor, as long as play the dividing potential drop effect.
The CNC control module through analyze feedback signal judge lathe or each position duty of automation equipment with and the correctness of operation, and then to its control.Usually numerically-controlled machine or automation equipment feedback signal have two kinds of forms, are respectively common 24V and altogether.So-called 24V altogether when promptly lathe or automation equipment have feedback signal to come, shows as switch level 24V and is loaded into V0 end shown in Figure 3 in Fig. 3; Be lathe or automation equipment when having feedback signal to come altogether, V0 is held with terminating to.Altogether 24V with generally be to control altogether by relay or other switches, when not having feedback signal to come, relay or switch are in disconnection (or unsettled) state.Said first datum can be elected 24V as.
Principle of work of the present invention is: when feedback signal is 24V or 0V; Be when feedback signal terminal is connected to common 24V end or 0V holds altogether; CNC machine feedback chromacoder produces low level (or level "0") and flows to the CNC digital control system; When feedback signal terminal was not connected to common 24V end or is total to the 0V end, CNC machine feedback chromacoder produced high level (or level"1") and flows to the CNC digital control system.For realizing this function, the present invention adopts two limit comparator circuits, as shown in Figure 3.Wherein U3, U4 are two operational amplifiers, adopt the 24V power supply respectively.U3, U4 form two limit comparator circuits, and the input end in the same way of U3 is set to upper voltage limit V1, and the reverse input end of U4 is set to lower voltage limit V2, and the input end in the same way of the reverse input end of U3 and U4 links to each other, as the input end of feedback signal Vin.U3, U4 output adopt " with " connected mode link to each other.Wherein resistance R 2, R4 and R6 form bleeder circuit, and R2 and R4, R6 are the upper voltage limit V1 and the lower voltage limit V2 of two limit comparator circuits with the 24V dividing potential drop.
When lathe or automation equipment output feedback signal during for 24V end altogether; 24V is loaded into V 0 end; Through the resistance value of R2 in the bleeder circuit, R4 and R6 is set; Make V0 greater than V1, V0 is greater than V2, and this moment, comparer U3 was output as low level; U4 is output as high level; Since U3, U4 adopt " with " mode be connected, so double-limit comparator output shows as low level, low level is input to CNC control center FEEDBACK CONTROL end; When lathe or automation equipment output feedback signal altogether the time, V0 terminates to ground, and this moment, comparer U3 was output as high level, and U4 is output as low level, and said double-limit comparator shows as low level output, and low level is input to CNC control center FEEDBACK CONTROL end.
Another kind of embodiment; Also comprise reverser, said reverser connects the output terminal of said comparison means, and said reverser can be elected the not gate device as; Be used for the high level of comparison means output is become low level or low level is become high level, to satisfy the demand of different control units.
Second embodiment of the invention provides a kind of CNC machine feedback chromacoder; Numerically-controlled machine feedback signal level to multi-form provides a kind of circuit form to change; Eliminate available technology adopting PNP, NPN or mixing change-over panel and very easily obscured the phenomenon of makeing mistakes; Realize the simplicity of feedback signal level conversion form; Improved throughput rate, also made Installation and Debugging more quick simultaneously.
Third embodiment of the invention provides a kind of CNC machine feedback chromacoder; Like Fig. 4 and shown in Figure 5; Comprise: bleeder circuit 1 and comparison means 2; Said bleeder circuit 1 one ends connect first reference voltage; Other end ground connection, said bleeder circuit are used for output first voltage and second voltage after the first reference voltage dividing potential drop; Said comparison means 2 comprises first voltage input end, second voltage input end and CNC machine feedback signal input part; Be used for feedback signal is compared with first voltage and second voltage respectively, and give according to comparative result to CNC control module output feedback signal.
Also comprise unsettled control circuit 3; Said unsettled control circuit 3 one ends connect first reference voltage; One end ground connection, output terminal connect the CNC machine feedback signal input part of said comparison means 2, are used for when the CNC lathe does not have output feedback signal to said comparison means input signal.
Said comparison means 2 comprises the first comparer U1; The second comparer U2 and pull-up resistor R3; The input end in the same way of the said first comparer U1 is first voltage input end; The reverse input end of the said second comparer U2 is second voltage input end; The input end in the same way of the reverse input end of the said first comparer U1 and the second comparer U2 is CNC machine feedback signal input part; Said pull-up resistor R3 one end connects first reference voltage; The other end connects the output terminal of the said first comparer U1, and the output terminal of the said first comparer U1 and the second comparer U2 links together.First comparer U1 of said comparison means 2 and the power end of the second comparer U2 are connected first reference voltage respectively, earth terminal ground connection.
Said bleeder circuit 1 comprises: first sectional pressure element, and an end connects first reference voltage, and the other end is exported the first voltage V1; Second sectional pressure element, an end connect the end that first sectional pressure element is exported the first voltage V1, and the other end is exported the second voltage V2; The 3rd sectional pressure element, an end connect the end that second sectional pressure element is exported second voltage, other end ground connection.
Said first sectional pressure element is that first resistance R, 2, the second sectional pressure elements are that second resistance R, 4, the three sectional pressure elements are the 3rd resistance R 6.Said first resistance, second resistance and the 3rd resistance can be fixed resistance, also can be variable resistor, as long as play the dividing potential drop effect.
Said unsettled control circuit comprises 3 the 4th resistance R 1 and the 5th resistance R 5; One end of said the 4th resistance R 1 connects first reference voltage; The other end connects the CNC machine feedback signal input part of said comparison means 2; Said the 5th resistance R 5 one ends connect said relatively the adorn 2 CNC machine feedback signal input parts of putting, other end ground connection.
Principle of work of the present invention is: when feedback signal is 24V or 0V; Be when feedback signal terminal is connected to common 24V end or 0V holds altogether; CNC machine feedback chromacoder produces low level (or level "0") and flows to the CNC digital control system; When feedback signal terminal was not connected to common 24V end or is total to the 0V end, CNC machine feedback chromacoder produced high level (or level"1") and flows to the CNC digital control system.For realizing this function, the present invention adopts two limit comparator circuits, as shown in Figure 2.Wherein U1, U2 are two comparers, adopt the 24V power supply respectively.U1, U2 form two limit comparator circuits, and the input end in the same way of U1 is set to upper voltage limit V1, and the reverse input end of U2 is set to lower voltage limit V2, and the input end in the same way of the reverse input end of U1 and U2 links to each other, as the input end of feedback signal Vin.U1, U2 output adopt " with " connected mode link to each other.Wherein resistance R 2, R4 and R6 form bleeder circuit, and R2 and R4, R6 are the upper voltage limit V1 and the lower voltage limit V2 of two limit comparator circuits with the 24V dividing potential drop.
When lathe or automation equipment output feedback signal during for 24V end altogether; 24V is loaded into the V0 end; Through the resistance value of R2 in the bleeder circuit, R4 and R6 is set; Make V0 greater than V1, V0 is greater than V2, and this moment, comparer U1 was output as low level; U2 is output as high level; Since U1, U2 adopt " with " mode be connected, so double-limit comparator output shows as low level, low level is input to CNC control center FEEDBACK CONTROL end; When lathe or automation equipment output feedback signal altogether the time, V0 terminates to ground, and this moment, comparer U1 was output as high level, and U2 is output as low level, and said double-limit comparator shows as low level output, and low level is input to CNC control center FEEDBACK CONTROL end.When lathe or automation equipment do not have output feedback signal; Relay or switch are in off-state; This moment is through being provided with unsettled control circuit; Make feedback input signal be arranged to intermediate level V0; To guarantee that input signal is in a stable intermediate level value when no lathe or the automation equipment feedback signal, to guarantee that double-limit comparator output Vout is a high level.Be set to intermediate level V0 through the 4th resistance R 1 in the unsettled circuit and the 5th resistance R 5 input signals, V0 is between level V1 and the V2.When Vin is in vacant state, because V0 is less than V1, so U1 is output as high level; Because V0 is greater than V2, U2 output also is high level; U1, U2 adopt " with " mode be connected, so the output of double-limit comparator shows as high level.
Another kind of embodiment; Also comprise reverser, said reverser connects the output terminal of said comparison means, and said reverser can be elected the not gate device as; Be used for the high level of comparison means output is become low level or low level is become high level, to satisfy the demand of different control units.
Third embodiment of the invention provides a kind of CNC machine feedback chromacoder; Digit Control Machine Tool feedback signal level to multi-form provides a kind of circuit form to change; Eliminate available technology adopting PNP, NPN or mixing change-over panel and very easily obscured the phenomenon of makeing mistakes; Realize the simplicity of feedback signal level conversion form; Improved productivity ratio; Simultaneously also make Installation and Debugging more quick; The unsettled control circuit that increases can be to said comparison means input signal when the CNC lathe does not have output feedback signal; Avoid other signalization input circuit; And unsettled control circuit is simple in structure, and cost is low.
Fourth embodiment of the invention provides a kind of CNC machine feedback chromacoder; Like Fig. 4 and shown in Figure 6; Comprise: bleeder circuit 1 and comparison means 2; Said bleeder circuit 1 one ends connect first reference voltage; Other end ground connection, said bleeder circuit are used for output first voltage and second voltage after the first reference voltage dividing potential drop; Said comparison means 2 comprises first voltage input end, second voltage input end and CNC machine feedback signal input part; Be used for feedback signal is compared with first voltage and second voltage respectively, and give according to comparative result to CNC control module output feedback signal.
Also comprise unsettled control circuit 3; Said unsettled control circuit 3 one ends connect first reference voltage; One end ground connection, output terminal connect the CNC machine feedback signal input part of said comparison means 2, are used for when the CNC lathe does not have output feedback signal to said comparison means input signal.
Said comparison means 2 comprises the first operational amplifier U3 and the second operational amplifier U4; The said first operational amplifier U3 is provided with first voltage input end and CNC machine feedback signal input part; The said second operational amplifier U4 is provided with second voltage input end and CNC machine feedback signal input part, and the output terminal of the said first operational amplifier U3 and the second operational amplifier U4 links together.
The input end in the same way of the said first operational amplifier U3 is first voltage input end; The reverse input end of the said second operational amplifier U4 is second voltage input end, and the input end in the same way of the reverse input end of the said first operational amplifier U3 and the second operational amplifier U4 is CNC machine feedback signal input part.The power end of said first operational amplifier U3 and the said second operational amplifier U4 is connected first reference voltage respectively, earth terminal ground connection.
Said bleeder circuit 1 comprises: first sectional pressure element, and an end connects first reference voltage, and the other end is exported the first voltage V1; Second sectional pressure element, an end connect the end that first sectional pressure element is exported the first voltage V1, and the other end is exported the second voltage V2; The 3rd sectional pressure element, an end connect the end that second sectional pressure element is exported second voltage, other end ground connection.
Said first sectional pressure element is that first resistance R, 2, the second sectional pressure elements are that second resistance R, 4, the three sectional pressure elements are the 3rd resistance R 6.Said first resistance, second resistance and the 3rd resistance can be fixed resistance, also can be variable resistor, as long as play the dividing potential drop effect.
Said unsettled control circuit comprises 3 the 4th resistance R 1 and the 5th resistance R 5; One end of said the 4th resistance R 1 connects first reference voltage; The other end connects the CNC machine feedback signal input part of said comparison means 2; Said the 5th resistance R 5 one ends connect said relatively the adorn 2 CNC machine feedback signal input parts of putting, other end ground connection.
Principle of work of the present invention is: when feedback signal is 24V or 0V; Be when feedback signal terminal is connected to common 24V end or 0V holds altogether; CNC machine feedback chromacoder produces low level (or level "0") and flows to the CNC digital control system; When feedback signal terminal was not connected to common 24V end or is total to the 0V end, CNC machine feedback chromacoder produced high level (or level"1") and flows to the CNC digital control system.For realizing this function, the present invention adopts two limit comparator circuits, as shown in Figure 6.Wherein U3, U4 are two operational amplifiers, adopt the 24V power supply respectively.U3, U4 form two limit comparator circuits, and the input end in the same way of U3 is set to upper voltage limit V1, and the reverse input end of U4 is set to lower voltage limit V2, and the input end in the same way of the reverse input end of U3 and U4 links to each other, as the input end of feedback signal Vin.U3, U4 output adopt " with " connected mode link to each other.Wherein resistance R 2, R4 and R6 form bleeder circuit, and R2 and R4, R6 are the upper voltage limit V1 and the lower voltage limit V2 of two limit comparator circuits with the 24V dividing potential drop.
When lathe or automation equipment output feedback signal during for 24V end altogether; 24V is loaded into the V0 end; Through the resistance value of R2 in the bleeder circuit, R4 and R6 is set; Make V0 greater than V1, V0 is greater than V2, and this moment, operational amplifier U3 was output as low level; U4 is output as high level; Since U3, U4 adopt " with " mode be connected, so double-limit comparator output shows as low level, low level is input to CNC control center FEEDBACK CONTROL end; When lathe or automation equipment output feedback signal altogether the time, V0 terminates to ground, and this moment, operational amplifier U3 was output as high level, and U4 is output as low level, and said double-limit comparator shows as low level output, and low level is input to CNC control center FEEDBACK CONTROL end.When lathe or automation equipment do not have output feedback signal; Relay or switch are in off-state; This moment is through being provided with unsettled control circuit; Make feedback input signal be arranged to intermediate level V0; To guarantee that input signal is in a stable intermediate level value when no lathe or the automation equipment feedback signal, to guarantee that double-limit comparator output Vout is a high level.Be set to intermediate level V0 through the 4th resistance R 1 in the unsettled circuit and the 5th resistance R 5 input signals, V0 is between level V1 and the V2.When Vin is in vacant state, because V0 is less than V1, so U1 is output as high level; Because V0 is greater than V2, U2 output also is high level; U3, U4 adopt " with " mode be connected, so the output of double-limit comparator shows as high level.
Another kind of embodiment; Also comprise reverser, said reverser connects the output terminal of said comparison means, and said reverser can be elected the not gate device as; Be used for the high level of comparison means output is become low level or low level is become high level, to satisfy the demand of different control units.
Fourth embodiment of the invention provides a kind of CNC machine feedback chromacoder; Digit Control Machine Tool feedback signal level to multi-form provides a kind of circuit form to change; Eliminate available technology adopting PNP, NPN or mixing change-over panel and very easily obscured the phenomenon of makeing mistakes; Realize the simplicity of feedback signal level conversion form; Improved productivity ratio; Simultaneously also make Installation and Debugging more quick; The unsettled control circuit that increases can be to said comparison means input signal when the CNC lathe does not have output feedback signal; Avoid other signalization input circuit; And unsettled control circuit is simple in structure, and cost is low.
Fifth embodiment of the invention provides a kind of CNC machine feedback chromacoder; Like Fig. 7 and shown in Figure 8; Comprise: bleeder circuit 1 and comparison means 2; Said bleeder circuit 1 one ends connect first reference voltage; Other end ground connection, said bleeder circuit are used for output first voltage and second voltage after the first reference voltage dividing potential drop; Said comparison means 2 comprises first voltage input end, second voltage input end and CNC machine feedback signal input part; Be used for feedback signal is compared with first voltage and second voltage respectively, and give according to comparative result to CNC control module output feedback signal.
Said CNC machine feedback chromacoder also comprises unsettled control circuit 3; Said unsettled control circuit 3 one ends connect first reference voltage; One end ground connection; Output terminal connects the CNC machine feedback signal input part of said comparison means 2, is used for when the CNC lathe does not have output feedback signal to said comparison means input signal.
Said CNC machine feedback chromacoder also comprises first display circuit 4, and said first display circuit, one end connects said comparison means, is used for sending when said comparison means has the input of CNC machine feedback signal demonstration.
Said comparison means 2 comprises the first comparer U1; The second comparer U2 and pull-up resistor R3; The input end in the same way of the said first comparer U1 is first voltage input end; The reverse input end of the said second comparer U2 is second voltage input end; The input end in the same way of the reverse input end of the said first comparer U1 and the second comparer U2 is CNC machine feedback signal input part; Said pull-up resistor R3 one end connects first reference voltage; The other end connects the output terminal of the said first comparer U1, and the output terminal of the said first comparer U1 and the second comparer U2 links together.First comparer U1 of said comparison means 2 and the power end of the second comparer U2 are connected first reference voltage respectively, earth terminal ground connection.
Said bleeder circuit 1 comprises: first sectional pressure element, and an end connects first reference voltage, and the other end is exported the first voltage V1; Second sectional pressure element, an end connect the end that first sectional pressure element is exported the first voltage V1, and the other end is exported the second voltage V2; The 3rd sectional pressure element, an end connect the end that second sectional pressure element is exported second voltage, other end ground connection.
Said first sectional pressure element is that first resistance R, 2, the second sectional pressure elements are that second resistance R, 4, the three sectional pressure elements are the 3rd resistance R 6.
Said unsettled control circuit comprises 3 the 4th resistance R 1 and the 5th resistance R 5; One end of said the 4th resistance R 1 connects first reference voltage; The other end connects the CNC machine feedback signal input part of said comparison means 2; Said the 5th resistance R 5 one ends connect said relatively the adorn 2 CNC machine feedback signal input parts of putting, other end ground connection.
Said first display circuit 4 comprises light emitting diode D1, and the anode tap of said light emitting diode D1 connects said pull-up resistor R3, and the cathode terminal of said light emitting diode D1 connects the output terminal of said comparison means.
Principle of work of the present invention is: when feedback signal is 24V or 0V; Be when feedback signal terminal is connected to common 24V end or 0V holds altogether; CNC machine feedback chromacoder produces low level (or level "0") and flows to the CNC digital control system; When feedback signal terminal was not connected to common 24V end or is total to the 0V end, CNC machine feedback chromacoder produced high level (or level"1") and flows to the CNC digital control system.For realizing this function, the present invention adopts two limit comparator circuits, as shown in Figure 8.Wherein U1, U2 are two comparers, adopt the 24V power supply respectively.U1, U2 form two limit comparator circuits, and the input end in the same way of U1 is set to upper voltage limit V1, and the reverse input end of U2 is set to lower voltage limit V2, and the input end in the same way of the reverse input end of U1 and U2 links to each other, as the input end of feedback signal Vin.U1, U2 output adopt " with " connected mode link to each other.Wherein resistance R 2, R4 and R6 form bleeder circuit, and R2 and R4, R6 are the upper voltage limit V1 and the lower voltage limit V2 of two limit comparator circuits with the 24V dividing potential drop.
When lathe or automation equipment output feedback signal during for 24V end altogether; 24V is loaded into V 0 end; Through the resistance value of R2 in the bleeder circuit, R4 and R6 is set; Make V0 greater than V1, V0 is greater than V2, and this moment, comparer U1 was output as low level; U2 is output as high level; Since U1, U2 adopt " with " mode be connected, so double-limit comparator output shows as low level, low level is input to CNC control center FEEDBACK CONTROL end; When lathe or automation equipment output feedback signal altogether the time, V0 terminates to ground, and this moment, comparer U1 was output as high level, and U2 is output as low level, and said double-limit comparator shows as low level output, and low level is input to CNC control center FEEDBACK CONTROL end.When lathe or automation equipment do not have output feedback signal; Relay or switch are in off-state; This moment, input signal was arranged to intermediate level V0; To guarantee that input signal is in a stable intermediate level value when no lathe or the automation equipment feedback signal, to guarantee that double-limit comparator output Vout is a high level.Be set to intermediate level V0 through the 4th resistance R 1 in the unsettled circuit and the 5th resistance R 5 input signals, V0 is between level V1 and the V2.When Vin is in vacant state, because V0 is less than V1, so U1 is output as high level; Because V0 is greater than V2, U2 output also is high level; U1, U2 adopt " with " mode be connected, so the output of double-limit comparator shows as high level.Fifth embodiment of the invention also comprises first display circuit; When the machine feedback signal was imported, double-limit comparator was output as low, and the luminous demonstration of LED is arranged this moment; Wherein pull-up resistor R3 play current limliting and on draw effect, guarantee that light emitting diode D1 is operated within the rated power.
The sequential tabulation of the present invention's first display circuit is:
| The input of machine feedback signal | The output of CNC feedback signal conversion equipment | Led state |
| High level | Low level | Bright |
| Low level | Low level | Bright |
| Unsettled level | High level | Go out |
Another kind of embodiment; Also comprise reverser, said reverser connects the output terminal of said comparison means, and said reverser can be elected the not gate device as; Be used for the high level of comparison means output is become low level or low level is become high level, to satisfy the demand of different control units.
Fifth embodiment of the invention provides a kind of CNC machine feedback chromacoder; Numerically-controlled machine feedback signal level to multi-form provides a kind of circuit form to change; Eliminate available technology adopting PNP, NPN or mixing change-over panel and very easily obscured the phenomenon of makeing mistakes; Realize the simplicity of feedback signal level conversion form; Improved throughput rate, also made Installation and Debugging more quick simultaneously.The display circuit that increases makes things convenient for the technician to observe the state of present machine feedback signal.
Sixth embodiment of the invention provides a kind of CNC machine feedback chromacoder; Like Fig. 7 and shown in Figure 9; Comprise: bleeder circuit 1 and comparison means 2; Said bleeder circuit 1 one ends connect first reference voltage; Other end ground connection, said bleeder circuit are used for output first voltage and second voltage after the first reference voltage dividing potential drop; Said comparison means 2 comprises first voltage input end, second voltage input end and CNC machine feedback signal input part; Be used for feedback signal is compared with first voltage and second voltage respectively, and give according to comparative result to CNC control module output feedback signal.
Said CNC machine feedback chromacoder also comprises unsettled control circuit 3; Said unsettled control circuit 3 one ends connect first reference voltage; One end ground connection; Output terminal connects the CNC machine feedback signal input part of said comparison means 2, is used for when the CNC lathe does not have output feedback signal to said comparison means input signal.
Said CNC machine feedback chromacoder also comprises second display circuit 5; Said second display circuit, 5 one ends connect first reference voltage; The other end connects the output terminal of said comparison means, is used for sending when said comparison means has the input of CNC machine feedback signal demonstration.
Said comparison means 2 comprises the first operational amplifier U3 and the second operational amplifier U4; The said first operational amplifier U3 is provided with first voltage input end and CNC machine feedback signal input part; The said second operational amplifier U4 is provided with second voltage input end and CNC machine feedback signal input part, and the output terminal of the said first operational amplifier U3 and the second operational amplifier U4 links together.
The input end in the same way of the said first operational amplifier U3 is first voltage input end; The reverse input end of the said second operational amplifier U4 is second voltage input end, and the input end in the same way of the reverse input end of the said first operational amplifier U3 and the second operational amplifier U4 is CNC machine feedback signal input part.The power end of said first operational amplifier U3 and the said second operational amplifier U4 is connected first reference voltage respectively, earth terminal ground connection.
Said bleeder circuit 1 comprises: first sectional pressure element, and an end connects first reference voltage, and the other end is exported the first voltage V1; Second sectional pressure element, an end connect the end that first sectional pressure element is exported the first voltage V1, and the other end is exported the second voltage V2; The 3rd sectional pressure element, an end connect the end that second sectional pressure element is exported second voltage, other end ground connection.
Said first sectional pressure element is that first resistance R, 2, the second sectional pressure elements are that second resistance R, 4, the three sectional pressure elements are the 3rd resistance R 6.
Said unsettled control circuit comprises 3 the 4th resistance R 1 and the 5th resistance R 5; One end of said the 4th resistance R 1 connects first reference voltage; The other end connects the CNC machine feedback signal input part of said comparison means 2; Said the 5th resistance R 5 one ends connect said relatively the adorn 2 CNC machine feedback signal input parts of putting, other end ground connection.
Said second display circuit 5 comprises the 6th resistance R 3 and light emitting diode D1; Said the 6th resistance R 3 one ends connect first reference voltage; The other end connects the anode tap of said light emitting diode D1, and the cathode terminal of said light emitting diode D1 connects the output terminal of said comparison means.
Principle of work of the present invention is: when feedback signal is 24V or 0V; Be when feedback signal terminal is connected to common 24V end or 0V holds altogether; CNC machine feedback chromacoder produces low level (or level "0") and flows to the CNC digital control system; When feedback signal terminal was not connected to common 24V end or is total to the 0V end, CNC machine feedback chromacoder produced high level (or level"1") and flows to the CNC digital control system.For realizing this function, the present invention adopts two limit comparator circuits, as shown in Figure 9.Wherein U3, U4 are two operational amplifiers, adopt the 24V power supply respectively.U3, U4 form two limit comparator circuits, and the input end in the same way of U3 is set to upper voltage limit V1, and the reverse input end of U4 is set to lower voltage limit V2, and the input end in the same way of the reverse input end of U3 and U4 links to each other, as the input end of feedback signal Vin.U3, U4 output adopt " with " connected mode link to each other.Wherein resistance R 2, R4 and R6 form bleeder circuit, and R2 and R4, R6 are the upper voltage limit V1 and the lower voltage limit V2 of two limit comparator circuits with the 24V dividing potential drop.
When lathe or automation equipment output feedback signal during for 24V end altogether; 24V is loaded into the V0 end; Through the resistance value of R2 in the bleeder circuit, R4 and R6 is set; Make V0 greater than V1, V0 is greater than V2, and this moment, operational amplifier U3 was output as low level; U4 is output as high level; Since U3, U4 adopt " with " mode be connected, so double-limit comparator output shows as low level, low level is input to CNC control center FEEDBACK CONTROL end; When lathe or automation equipment output feedback signal altogether the time, V0 terminates to ground, and this moment, operational amplifier U3 was output as high level, and U4 is output as low level, and said double-limit comparator shows as low level output, and low level is input to CNC control center FEEDBACK CONTROL end.When lathe or automation equipment do not have output feedback signal; Relay or switch are in off-state; This moment is through being provided with unsettled control circuit; Make feedback input signal be arranged to intermediate level V0; To guarantee that input signal is in a stable intermediate level value when no lathe or the automation equipment feedback signal, to guarantee that double-limit comparator output Vout is a high level.Be set to intermediate level V0 through the 4th resistance R 1 in the unsettled circuit and the 5th resistance R 5 input signals, V0 is between level V1 and the V2.When Vin is in vacant state, because V0 is less than V1, so U1 is output as high level; Because V0 is greater than V2, U2 output also is high level; U3, U4 adopt " with " mode be connected, so the output of double-limit comparator shows as high level.Sixth embodiment of the invention also comprises second display circuit; When the machine feedback signal was imported, double-limit comparator was output as low, and the luminous demonstration of LED is arranged this moment; Wherein the 6th resistance R 3 play current limliting and on draw effect, guarantee that light emitting diode D1 is operated within the rated power.
The sequential tabulation of the present invention's second display circuit is:
| The input of machine feedback signal | The output of CNC feedback signal conversion equipment | Led state |
| High level | Low level | Bright |
| Low level | Low level | Bright |
| Unsettled level | High level | Go out |
Another kind of embodiment; Also comprise reverser, said reverser connects the output terminal of said comparison means, and said reverser can be elected the not gate device as; Be used for the high level of comparison means output is become low level or low level is become high level, to satisfy the demand of different control units.
Sixth embodiment of the invention provides a kind of CNC machine feedback chromacoder; Numerically-controlled machine feedback signal level to multi-form provides a kind of circuit form to change; Eliminate available technology adopting PNP, NPN or mixing change-over panel and very easily obscured the phenomenon of makeing mistakes; Realize the simplicity of feedback signal level conversion form; Improved throughput rate, also made Installation and Debugging more quick simultaneously.The display circuit that increases makes things convenient for the technician to observe the state of present machine feedback signal.
The embodiment of the invention seven provides a kind of CNC machine tool control system; Comprise control module and the CNC machine feedback chromacoder that at least one is above-mentioned; As shown in figure 10; Comprise 1CNC machine feedback chromacoder, 2CNC machine feedback chromacoder and nCNC machine feedback chromacoder; Be connected with control module respectively, be used for to control module output control signal.
What deserves to be mentioned is that among the above embodiment, various structure characteristic (for example above-mentioned multiple connected mode) can make up use each other, is not limited to shown in each accompanying drawing.
In the above-described embodiments, only the present invention has been carried out exemplary description, but those skilled in the art can carry out various modifications to the present invention after reading present patent application under the situation that does not break away from the spirit and scope of the present invention.
Claims (16)
1. CNC machine feedback chromacoder is characterized in that:
Comprise: bleeder circuit and comparison means,
Said bleeder circuit one end connects first reference voltage, other end ground connection, and said bleeder circuit is used for output first voltage and second voltage after the first reference voltage dividing potential drop;
Said comparison means comprises first voltage input end, second voltage input end and CNC machine feedback signal input part, be used for feedback signal is compared with first voltage and second voltage respectively, and according to comparative result to CNC control module output feedback signal.
2. CNC machine feedback chromacoder according to claim 1; It is characterized in that: said comparison means comprises first comparer, second comparer and pull-up resistor; Said first comparer is provided with first voltage input end and CNC machine feedback signal input part; Said second comparer is provided with second voltage input end and CNC machine feedback signal input part; Said pull-up resistor one end connects first reference voltage; The other end connects the output terminal of said first comparer, and the output terminal of said first comparer and second comparer links together.
3. CNC machine feedback chromacoder according to claim 2; It is characterized in that: the input end in the same way of said first comparer is first voltage input end; The reverse input end of said second comparer is second voltage input end, and the input end in the same way of the reverse input end of said first comparer and second comparer is CNC machine feedback signal input part.
4. according to claim 2 or 3 described CNC machine feedback chromacoders; It is characterized in that: also comprise first display circuit; Said first display circuit, one end connects said comparison means, is used for sending when said comparison means has the input of CNC machine feedback signal demonstration.
5. CNC machine feedback chromacoder according to claim 4; It is characterized in that: said first display circuit comprises light emitting diode; The anode tap of said light emitting diode connects said pull-up resistor, and the cathode terminal of said light emitting diode connects the output terminal of said comparison means.
6. CNC machine feedback chromacoder according to claim 1; It is characterized in that: said comparison means comprises first operational amplifier and second operational amplifier; Said first operational amplifier is provided with first voltage input end and CNC machine feedback signal input part; Said second operational amplifier is provided with second voltage input end and CNC machine feedback signal input part, and the output terminal of said first operational amplifier and second operational amplifier links together.
7. CNC machine feedback chromacoder according to claim 6; It is characterized in that: the input end in the same way of said first operational amplifier is first voltage input end; The reverse input end of said second operational amplifier is second voltage input end, and the input end in the same way of the reverse input end of said first operational amplifier and second operational amplifier is CNC machine feedback signal input part.
8. according to claim 6 or 7 described CNC machine feedback chromacoders; It is characterized in that: also comprise second display circuit; Said second display circuit, one end connects first reference voltage; The other end connects the output terminal of said comparison means, is used for sending when said comparison means has the input of CNC machine feedback signal demonstration.
9. CNC machine feedback chromacoder according to claim 8; It is characterized in that: said second display circuit comprises the 6th resistance and light emitting diode; Said the 6th resistance one end connects first reference voltage; The other end connects the anode tap of said light emitting diode, and the cathode terminal of said light emitting diode connects the output terminal of said comparison means.
10. according to claim 1 or 2 or 6 described CNC machine feedback chromacoders, it is characterized in that: said bleeder circuit comprises:
First sectional pressure element, an end connects first reference voltage, and the other end is exported first voltage;
Second sectional pressure element, an end connect the end that first sectional pressure element is exported first voltage, and the other end is exported second voltage;
The 3rd sectional pressure element, an end connect the end that second sectional pressure element is exported second voltage, other end ground connection.
11. CNC machine feedback chromacoder according to claim 10 is characterized in that: said first sectional pressure element is first resistance, second sectional pressure element is second resistance, and the 3rd sectional pressure element is the 3rd resistance.
12. according to claim 1 or 2 or 6 described CNC machine feedback chromacoders; It is characterized in that: also comprise unsettled control circuit; Said unsettled control circuit one end connects first reference voltage; One end ground connection; Output terminal connects the CNC machine feedback signal input part of said comparison means, is used for when the CNC lathe does not have output feedback signal to said comparison means input signal.
13. CNC machine feedback chromacoder according to claim 12; It is characterized in that: said unsettled control circuit comprises the 4th resistance and the 5th resistance; One end of said the 4th resistance connects first reference voltage; The other end connects the CNC machine feedback signal input part of said comparison means; Said the 5th resistance one end connects the CNC machine feedback signal input part of said comparison means, other end ground connection.
14. according to claim 1 or 2 or 6 described CNC machine feedback chromacoders, it is characterized in that: said CNC machine feedback signal voltage value is first reference voltage level or 0 level.
15. CNC machine feedback chromacoder according to claim 1 is characterized in that: also comprise reverser, said reverser is connected said comparison means output terminal.
16. CNC machine tool control system; It is characterized in that: comprise that CNC control module and at least one are as weighing 1 to power 15 any described CNC machine feedback chromacoders; Said at least one CNC machine feedback chromacoder is connected with control module respectively, is used for respectively to the control module output feedback signal.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103488120A (en) * | 2013-10-10 | 2014-01-01 | 昆山纯柏精密五金有限公司 | Signal control method of CNC (Computerized Numerical Control) machine tool |
| CN103488121A (en) * | 2013-10-10 | 2014-01-01 | 昆山纯柏精密五金有限公司 | CNC (Computer Numerical Control) machine control signal conversion method |
| CN105634462A (en) * | 2016-02-19 | 2016-06-01 | 西安秦川数控系统工程有限公司 | Level compatibility processing circuit for input signals |
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| CN105634462A (en) * | 2016-02-19 | 2016-06-01 | 西安秦川数控系统工程有限公司 | Level compatibility processing circuit for input signals |
| CN105634462B (en) * | 2016-02-19 | 2018-09-28 | 西安秦川数控系统工程有限公司 | A kind of level compatibility processing circuit of input signal |
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Application publication date: 20120215 |