JPH06332533A - Marker type original point return controlling device and method - Google Patents

Abstract

PURPOSE:To easily control the original point of a machine by calculating the distance between the position of a shift marker and the position of the nearest 1-rotation signal, calculating the shifted amount caused between the present original point of the machine and the position of the shift marker, and setting again the shifted amount as a new parameter. CONSTITUTION:A marker shifted amount arithmetic means calculates the distance F between a 1-rotation signal and the original point of a machine by adding a 1st marker shifted variable C and a 1st original point shifted amount B. The distance between the OFF position of a deceleration signal and the 1-rotation signal is calculated from the difference between both distances F and A. And, a 2nd marker shifted variable E is calculated from the difference between the distance set between the OFF position of the deceleration signal and the 1-rotation signal and the distance C set from a 2nd shift marker. Meanwhile, a 2nd original point shifted variable arithmetic means calculates a 2nd original point shifted amount D from the difference between the first 1-rotation signal and the machine original point by using the variable E. Then, both amounts E and D are used as the new parameters set between the first 1-rotation signal and the machine original point, and the original point of the machine is set again.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a marker-type home position return adjusting device and method in which the position of a dog for home position return deceleration can be easily adjusted and home position return parameters can be automatically set.

[0002]

2. Description of the Related Art When a machine tool is turned on, it usually
Origin return operation is started regardless of the position of the movable part of the machine.
It Then, when processing, the NC device
Command value, the command value and home position
Based on the offset value between the
Perform processing. Therefore, the machine origin position on the machining program
If the position of the actual moving part of the machine does not match, it is high.
Precision processing cannot be performed. In addition, the mechanical moving part
When stopping at the machine origin, set a deceleration signal near the machine origin.
Means for outputting (eg deceleration dogs and limits)
Switch combination) is installed, and limit switches etc. decelerate
It is turned on by the dog, and the deceleration signal output when this is turned on.
Adjust so that it stops at the first one-turn signal after the signal turns off.
Be adjusted. Such adjustment work is performed when assembling the machine. Toko
In the past, this adjustment of the origin position was performed once for the rotary shaft.
The turning signal is determined by the specifications of the ball screw.
Since it is not possible to adjust, the origin position is set at a position other than one rotation signal.
We are doing work to adjust the position. That is, (a) Deceleration signal is output
Adjust the position of the deceleration dog to
H is turned on by the deceleration dog, and output when this is turned on.
Stop at the first one-turn signal after the deceleration signal is turned off.
Position the deceleration dog so that Or (a)
If the first rotation signal does not stop exactly, the first 1
The origin shift is the distance when it stops after passing the rotation signal.
Parameter is set as
Adjust the machine origin by adding. And so on
However, in any case, (a) adjustment of the deceleration dog position,
(B) Parameter for the origin shift amount from the first one rotation signal
It becomes necessary to set the data. Further conventional adjustment method
A concrete example of the method will be described. For example, as shown in FIG.
The deceleration dog's OFF position S₁1 rotation signal (mark
Mosquito P₁, P₂) In the middle (position of C dimension),
First one revolution signal P after the deceleration signal is turned off₂Through
Machine origin G past₀Distance to (B₁Dimension distance)
Measure this B₁Parameter is the dimension distance as the origin shift amount.
The machine origin is adjusted by setting the data. So
Position S where the deceleration signal is OFF₁From the first one turn signal
Issue P₂Up to (distance C dimension) and the first rotation signal P₂Or
From the position of the origin shift amount (B₁Dimensional distance)
Distance (C + B₁), The movable part of the machine can be stopped at the machine origin.
It The deceleration dog OFF position S₁1 rotation signal
(Marker, P₁, P₂) The reason for adjusting to the middle is
Adjusting the position of the high speed dog is a difficult task, and
Since the position of the ring is determined by the relationship with the position of one rotation signal,
Deceleration dog OFF position S₁1 rotation signal P₁, P₂
If you set it in the middle of the interval, the deceleration dog will be a little later
This is because the machine origin cannot be displaced even if it shifts. Also, in FIG.
As shown, the first 1-speed transmission after the deceleration signal turns off.
Issue P₂Machine origin G that stopped after passing through₀Shift position
Marker position (from one rotation signal to B ₂Shift dimension distance
Marker amount), and the shift marker position M₂Reduced based on
Another shift mark is provided at the interval of one rotation signal on the OFF side of the speed signal.
CAM M₁, M₀The shift marker is provided based on these shift markers.
Tomarker M₁, M₂In the middle of the space (position of dimension C)
OFF position S of the bag₁And readjust. like this
OFF position S of deceleration dog₁By readjusting
Position S when the deceleration signal turned off₁To shift marker M
₂Machine moving part within a short distance to the position (distance C)
Can be stopped.

[0003]

However, the method of aligning the OFF position of the deceleration dog in the middle of one rotation signal (marker) in FIG. 4 is also the middle (C) between the shift markers in FIG.
Both the deceleration dog OFF position S ₁ and the readjustment position must be adjusted to the middle of one rotation signal or between the shift markers. It was very troublesome to adjust the position of. From the above, the present invention was devised in view of the above problems, and it is easy to adjust the position of the dog for home position return deceleration and the home position return parameter can be set automatically.
It is an object of the present invention to provide a marker-type origin return adjusting device and a method thereof that can easily perform mechanical origin adjusting work as a whole.

[0004]

In order to solve the above-mentioned problems, the marker-type home position return adjusting device of the present invention has one unit for each rotation of the feed shaft when moving the machine movable part from a predetermined position to the machine home position. A feed axis drive motor that outputs a rotation signal,
When the machine moving part is stopped at the machine origin, a deceleration signal is output in the vicinity of the machine origin and deceleration signal output means for turning off the deceleration signal and a distance A from the deceleration signal off position to the machine origin are detected. The deceleration signal OFF position detecting means for storing the distance A as the deceleration signal OFF position and the position C which is half the distance between the one rotation signal and the one rotation signal are provided, and the distance from the one rotation signal is provisionally set. Tentative first shift marker parameterized as the first marker shift amount C, the tentative first origin shift amount B parameterized as the distance from the first shift marker to the machine origin, and the deceleration signal OFF A second shift marker set at a position of a distance C that is half the distance between one rotation signals with the position as the center;
The distance F from the one rotation signal to the machine origin is obtained by adding the first marker shift amount C and the first origin shift amount B, and the distance from the deceleration signal off position to the one rotation signal is the distance F and the distance A. From the deceleration signal off position to the first rotation signal and the deceleration signal off position from the deceleration signal off position to the second position.
Marker shift amount calculating means for obtaining a second marker shift amount E which is a distance between the second shift marker and the first one rotation signal from the deceleration signal off position, based on the difference from the distance C to the shift marker. Second origin shift amount calculating means for obtaining a second origin shift amount D from the difference from the distance from the first one rotation signal to the mechanical origin using the second marker shift amount E, and the first marker shift amount C. And the first origin shift amount B are stored, and the calculated second marker shift amount E is stored.
And a storage means for storing the second origin shift amount D as a new parameter from the first one rotation signal to the machine origin. Further, the marker-type home position return adjusting method of the present invention is a procedure for detecting and storing the distance A from the off position after the output of the deceleration signal to the machine origin near the machine origin when the machine moving part is stopped at the machine origin. When,
The temporary first marker shift amount C parameterized to one rotation signal output for each rotation of the feed shaft that moves the machine movable part and half the distance between the one rotation signal, and the machine from the first shift marker A procedure of adding a temporary first origin shift amount B parameterized as a distance to the origin and obtaining and storing a distance F to the mechanical origin from the one rotation signal;
From the difference between the distance F and the distance A, the distance from the deceleration signal off position to the one rotation signal is obtained, and the distance from the deceleration signal off position to the one rotation signal and the half between the deceleration signal off position and the one rotation signal. The second marker shift amount, which is the distance between the second shift marker and the first one rotation signal from the deceleration signal OFF position, based on the difference from the distance C to the second shift marker set at the distance C of A procedure for obtaining and storing E, and a procedure for obtaining and storing the second origin shift amount D from the difference between the distance from the first one rotation signal to the machine origin using the second marker shift amount E, 2 Marker shift amount E
And a procedure for storing the second origin shift amount D as a new parameter from the first one rotation signal to the machine origin.

[0005]

[Operation] Between one rotation signal (P in FIG. 1)₁, P₂In the middle of
The first shift to the position (from 1 rotation signal to C dimension position)
Tomarker M₁, M₂Is provided, and this first shift
Tomarker M₂Position away from the origin shift amount (B dimension amount)
Machine origin G₀There is. In addition, one rotation signal P
₂From machine origin G₀The distance to is the F dimension. Now
OFF position S of deceleration dog₁Is one rotation signal P₂In the vicinity of
OFF position S of the deceleration dog by setting₁To
Use as a reference position for adjustment. So this deceleration dog
OFF position S₁Second shift marker centered on
L₁, L₂(Deceleration dog OFF position S₁From first
2 shift marker L₂The distance to is C dimension), 1
Rotation signal P₂To the second shift marker L₂Marker up to
The shift amount E is calculated. That is, the deceleration dog OFF position S
₁From machine origin G₀To the distance (A dimension amount) to
It By detecting this A dimension, the deceleration dog is in the OFF position.
Setting S ₁To 1 rotation signal P₂Distance (A-F) to
It Next, the deceleration dog OFF position S₁To the second shift
Tomarker L₂From the difference between the distance C and the distance (A-F)
The marker shift amount E is obtained and parameters are set. Just
Then, one rotation signal P₂From machine origin G₀Distance to F and Ma
The first shift after the deceleration dog is turned off using the marker shift amount E.
2 shift marker L₂To a new machine origin G₁Distance to
The distance D is calculated and the machine origin shift amount D is set as a parameter.
Set the final machine origin G₁Reset. For the above operations
This eliminates the troublesome adjustment of the dog position for deceleration to return to origin.
The machine origin adjustment work is easy in general.
It

[0006]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The principle of the present invention will be described with reference to FIG. In the figure, (a) shows a state in which the limit switch or the like is turned on by the deceleration dog (S ₀ position), and the deceleration signal output when this is turned on is turned off (S ₁ position). (b) shows one rotation signal P ₀ , which is output every one rotation of the ball screw when the mechanical moving part axially moves through the ball screw.
P _1, illustrates the position of P _2, (c) is a diagram showing the location of the first shift markers M _1, M ₂ or the second shift marker _{L 1, L 2, (d} ) the mechanical origin G ₀ (or G ₁₎ is a diagram showing the location of. In the machine origin adjustment work of the present invention, the first shift markers M ₁ and M ₂ are located at a position in the middle of one rotation signal (between P ₁ and P _{2 in} FIG. 1) (one rotation signal P ₂ to C dimension position). Is provided, and the machine origin G ₀ is located at a position away from the first shift marker M ₂ by the origin shift amount (B dimension amount). The distance from one rotation signal P ₂ to the machine origin G ₀ is defined as F dimension. Now, by setting the OFF position S ₁ of the deceleration dog near the one-rotation signal P ₂ , the OFF position S ₁ of the deceleration dog becomes the reference position for adjustment. Therefore, OF of this deceleration dog
Second shift markers L ₁ and L ₂ centered on the F position S ₁
Is provided (the distance from the deceleration dog OFF position S ₁ to the second shift marker L ₂ is C dimension), one rotation signal P
Marker shift amount E from ₂ to the second shift marker L ₂
Ask for. That is, the distance (A dimension amount) from the OFF position S ₁ of the deceleration dog to the machine origin G ₀ is detected. The deceleration dog's OFF position S ₁ to 1
The distance to the rotation signal P ₂ (A-F) is obtained. Next, from the OFF position S ₁ of the deceleration dog to the second shift marker L ₂
The marker shift amount E is obtained from the difference between the distance C to the distance C and the distance (AF), and the parameter is set. Then, the distance F from the one rotation signal P ₂ to the machine origin G ₀ and the marker shift amount E
Using, the distance D from the first second shift marker L ₂ after deceleration dog OFF to the new machine origin G ₁ is obtained, the parameter is set as the machine origin shift amount D, and the final machine origin G ₁ is set. Reset. By the above operation, it is possible to eliminate the troublesome position adjustment of the dog for origin return deceleration, and the machine origin adjustment work can be generally facilitated.

Next, an embodiment of the marker type origin return adjusting device of the present invention will be described with reference to the drawings. Figure 2
FIG. 3 is a block diagram of a marker type origin return adjusting device of the present invention. 1 is a central processing unit (CPU), 2 is a ROM for storing a control program, 3 is a RAM for storing data being processed, origin return parameters, etc., 4 is an NC program memory for storing an NC program, and 5 is an NC program. Axis control means for controlling the machine axis based on the instruction, 6
Is an amplifier, M is a servo motor, PG is a detection means for detecting a pulse signal or one rotation signal of the servo motor M and feeding it back to the axis control means 5, 7 is an input / output means, and CPU 1 is provided via an interface I / F. Connected with. Reference numeral 7a is a keyboard (KB), and 7b is a display (DPL). Reference numeral 8 is a calculation means, and this calculation means 8 comprises a marker shift amount calculation means and a second origin shift amount calculation means. The marker shift amount calculation means calculates the distance F from the one rotation signal to the mechanical origin as the first marker shift amount C and the first marker shift amount C.
The origin shift amount B is added to obtain the distance from the deceleration signal off position to the one rotation signal from the difference between the distance F and the distance A. The distance from the deceleration signal off position to the one rotation signal and deceleration A second marker shift amount E, which is the distance between the second shift marker and the first one rotation signal from the deceleration signal off position, is obtained from the difference from the distance C from the signal off position to the second shift marker. Is. Also, the second
The origin shift amount calculation means uses the second marker shift amount E to obtain the second origin shift amount D from the difference from the distance from the first one rotation signal to the mechanical origin. 9 is a current value counter for reading and counting the command pulse clock, which is the distance A from the deceleration signal off position to the machine origin.
Is detected and this distance A is output as the deceleration signal OFF position. A deceleration limit switch (LS) 10 is provided with a means (for example, a combination of a deceleration dog and a deceleration limit switch) for outputting a deceleration signal in the vicinity of the machine origin when the movable part of the machine is stopped at the machine origin. Then, the limit switch or the like is turned on by the deceleration dog, and it is detected when the deceleration signal output when this is turned on is turned off.

FIG. 3 shows the marker system origin return adjustment of the present invention.
It is a flow chart of processing. The flow chart of this invention
The marker type home position return adjustment processing will be described. CPU1 is a machine
It is judged whether or not there is a request for changing the origin (step 10
1) If there is a change request, output a deceleration signal near the machine origin
The distance A from the later off position to the machine origin is detected and recorded.
Remember (step 102). That is, the deceleration dog is turned off
Position S₁From machine origin G₀Up to the distance (dimension A)
Put out. Next, the CPU 1 controls the feed shaft that moves the movable part of the machine.
One rotation signal output for each rotation and half of the one rotation signal
Temporary first marker shift amount C parameterized by distance
And the distance from the first shift marker to the mechanical origin
The temporary first origin shift amount B parameterized by
Calculate the distance F from the one rotation signal to the machine origin
It is stored (step 103). And of the slowdown dog
OFF position S₁To the second shift marker L₂Distance to
From the deceleration signal off position to the front from the difference between C and the distance (A-F)
Find the distance to one rotation signal and set the deceleration signal off position
To the one rotation signal and the deceleration signal off position
The second shift set at half the distance C between one rotation signal
From the difference from the distance C to the marker, the second shift marker
Between the deceleration signal off position and the first one revolution signal
The second marker shift amount E, which is the distance, is calculated and stored (
Step 104). Then, one rotation signal P₂From machine origin
G₀Using the distance F to the
First second shift marker L after switching off ₂New from
Machine origin G₁To the second origin shift amount D
(Step 105). Second marker shift amount E and
When the 2 origin shift amount D is calculated, the second marker shift amount is calculated.
E and the second origin shift amount D are calculated from the first one rotation signal.
It is stored as a new parameter up to the machine origin (step
106), machine origin G₁Reset the process of this invention
finish.

[0009]

As described above, according to the present invention,
Position and parameterize at the current machine origin that has passed and stopped from the first one rotation signal after the deceleration signal turned OFF, set the parameter, and find the distance from this current machine origin to the deceleration signal OFF position. Find the position of the nearest single rotation signal from the distance to and the position of the machine origin,
Then, the shift marker position is set so that the deceleration signal OFF position is in the middle, and the distance between this shift marker position and the position of the nearest one rotation signal is obtained, and the origin shift between the current mechanical origin and the shift marker position is performed. Since it is configured to find the amount and reset the shift marker amount and the home shift amount as new parameters, the home return parameter can be set automatically, eliminating the troublesome dog position adjustment for home return deceleration. This also has the effect of facilitating the machine origin adjustment work as a whole.

[Brief description of drawings]

FIG. 1 is a diagram illustrating the principle of the present invention.

FIG. 2 is a block diagram of a numerical controller according to the present invention.

FIG. 3 is a flowchart of an origin return adjustment process of the present invention.

FIG. 4 is an explanatory diagram of a conventional origin return adjustment.

FIG. 5 is an explanatory diagram of a conventional origin return adjustment.

[Explanation of symbols]

 1 ... CPU 2 ... ROM 3 ... RAM 4 ... NC program memory 5 ... Axis control means 7 ... Input / output means 8 ... Calculation means 9 ... Present value counter 10 ... Limit switch for deceleration

Claims (2)

[Claims] 1. A feed shaft drive motor that outputs a single rotation signal for each rotation of the feed shaft when moving the machine movable part from a predetermined position to the machine origin, and when stopping the machine movable part at the machine origin, Deceleration signal output means for outputting a deceleration signal in the vicinity of the machine origin and turning off this deceleration signal, and distance A from the position where the deceleration signal is off to the machine origin is detected, and this distance A is stored as the deceleration signal off position. The signal-off position detection means is provided at a position of a distance C that is half the distance between the one rotation signal and the one rotation signal, and the distance from the one rotation signal is a first temporary value.
The temporary first parameterized as the marker shift amount C
A shift marker, a temporary first origin shift amount B parameterized as a distance from the first shift marker to the mechanical origin, and a distance C that is half the distance between one rotation signals centered on the deceleration signal OFF position. The second shift marker set to the position and the distance F from the one rotation signal to the machine origin are obtained by adding the first marker shift amount C and the first origin shift amount B, and the one rotation from the deceleration signal off position. The distance to the signal is obtained from the difference between the distance F and the distance A, and the distance from the deceleration signal off position to the one rotation signal and the deceleration signal off position is set to the second position.
Marker shift amount calculating means for obtaining a second marker shift amount E which is a distance between the second shift marker and the first one rotation signal from the deceleration signal off position, based on the difference from the distance C to the shift marker. Second origin shift amount calculating means for obtaining a second origin shift amount D from the difference from the distance from the first one rotation signal to the mechanical origin using the second marker shift amount E; and the first marker shift amount C. And a first origin shift amount B, and a storage means for storing the calculated second marker shift amount E and second origin shift amount D as new parameters from the first one rotation signal to the mechanical origin. A marker-type origin return adjusting device characterized by having. 2. When stopping the movable part of the machine at the machine origin,
A procedure for detecting and storing the distance A from the off position after the deceleration signal is output to the machine origin near the machine origin, and one rotation signal and one rotation signal output for each rotation of the feed shaft that moves the machine movable part. The temporary first marker shift amount C parameterized to half the distance and the temporary first origin shift amount B parameterized as the distance from the first shift marker to the machine origin are added to obtain the above. A procedure for obtaining and storing the distance F from the one rotation signal to the machine origin, and obtaining the distance from the deceleration signal off position to the one rotation signal from the difference between the distance F and the distance A, and from the deceleration signal off position to the above The second shift marker and the deceleration signal off position are calculated from the difference between the distance to the one rotation signal and the distance C from the deceleration signal off position to the half shift distance C between the one rotation signals to the second shift marker. Or A procedure for obtaining and storing a second marker shift amount E, which is a distance from the first one rotation signal, and a distance from the first one rotation signal to the machine origin, using the second marker shift amount E. From the procedure of obtaining and storing the second origin shift amount D from the difference and the procedure of storing the second marker shift amount E and the second origin shift amount D as new parameters from the first one rotation signal to the mechanical origin. The marker-based return-to-origin adjustment method characterized in that