GB911131A - Improvements relating to servo-controlled drives - Google Patents

Improvements relating to servo-controlled drives

Info

Publication number
GB911131A
GB911131A GB3850859A GB3850859A GB911131A GB 911131 A GB911131 A GB 911131A GB 3850859 A GB3850859 A GB 3850859A GB 3850859 A GB3850859 A GB 3850859A GB 911131 A GB911131 A GB 911131A
Authority
GB
United Kingdom
Prior art keywords
piston
error signal
actuator
valve
switch
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
GB3850859A
Inventor
David Theodore Nels Williamson
Donald Ferguson Walker
Richard Samuel Jonathan Good
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ferranti International PLC
Original Assignee
Ferranti PLC
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Ferranti PLC filed Critical Ferranti PLC
Priority to GB3850859A priority Critical patent/GB911131A/en
Priority to DE19601427114 priority patent/DE1427114A1/en
Publication of GB911131A publication Critical patent/GB911131A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
    • B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
    • B23Q5/00—Driving or feeding mechanisms; Control arrangements therefor
    • B23Q5/22—Feeding members carrying tools or work
    • B23Q5/34—Feeding other members supporting tools or work, e.g. saddles, tool-slides, through mechanical transmission
    • B23Q5/50—Feeding other members supporting tools or work, e.g. saddles, tool-slides, through mechanical transmission feeding step-by-step
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B19/00—Programme-control systems
    • G05B19/02—Programme-control systems electric
    • G05B19/18—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form
    • G05B19/19—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by positioning or contouring control systems, e.g. to control position from one programmed point to another or to control movement along a programmed continuous path
    • G05B19/39—Numerical control [NC], i.e. automatically operating machines, in particular machine tools, e.g. in a manufacturing environment, so as to execute positioning, movement or co-ordinated operations by means of programme data in numerical form characterised by positioning or contouring control systems, e.g. to control position from one programmed point to another or to control movement along a programmed continuous path using a combination of the means covered by at least two of the preceding groups G05B19/21, G05B19/27 and G05B19/33
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/30—Nc systems
    • G05B2219/37—Measurements
    • G05B2219/37462—Resistor, potentiometers
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/30—Nc systems
    • G05B2219/41—Servomotor, servo controller till figures
    • G05B2219/41309—Hydraulic or pneumatic drive
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/30—Nc systems
    • G05B2219/41—Servomotor, servo controller till figures
    • G05B2219/41352—Alternative clamping dilation of piezo, caterpillar motion, inchworm
    • G—PHYSICS
    • G05—CONTROLLING; REGULATING
    • G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
    • G05B2219/00—Program-control systems
    • G05B2219/30—Nc systems
    • G05B2219/42—Servomotor, servo controller kind till VSS
    • G05B2219/42199—Fine position with gauge, coarse with limit switch, transducer

Landscapes

  • Engineering & Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Manufacturing & Machinery (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Automation & Control Theory (AREA)
  • Mechanical Engineering (AREA)
  • Control Of Position Or Direction (AREA)
  • Inking, Control Or Cleaning Of Printing Machines (AREA)

Abstract

911,131. Automatic speed and acceleration control. FERRANTI Ltd. Nov. 9, 1960 [Nov. 13, 1959], No. 38508/59. Class 38 (4). The work-table 10 of a machine tool is driven to the right at a steady velocity in response to a control signal applied over line 32 to a device 31 which compares the control signal with one provided by pick-off 23 and affords an error signal over line .34. Short-range hydraulic actuators A, B, C are adapted to operate cyclically in sequence to drive the table. When the piston of actuator C closes switch RC, relay XB/4 is energized so that the error signal on line 34 is applied to valve 15B, thereby starting piston 13B on its rightward movement. The output from comparator 24B is also applied to valve 15B to afford an additional control voltage, proportional to the difference between the velocities of the table and the piston, which acts as a starting boost to the piston. The movement of the piston operates switch PB-SB in turn, and when the piston has reached the speed demanded by the error signal, clutch 16B is engaged by switch QB so that actuator B shares the load with actuator C. When piston 13B reaches and closes contacts RB it energizes relay XA/4 to start actuator A by applying the error signal to valve 15A. Actuation of switch SB de-energizes relay XB/4 to remove the error signal from valve 15B and to disengage the clutch 16B. The idle piston 13B is then restored to its rest position, relay YB/3 being energized so that a return signal is applied to valve 15B from terminal 35. In a modification, the table is driven in either direction by an error signal which varies in sense, each actuator being provided with a further group of switches, similar to the group PB-SB, which are operated sequentially as the piston makes an active stroke in the opposite direction, Fig. 6 (not shown). A changeover switch responsive to the sense of the error signal connects the relays to the group appropriate to that sense. In some cases, an oncoming actuator may receive a starting signal before its idle piston has been transferred to its rest position from its previous active stroke, so causing the piston to lose station over the subsequent cycles of operation. To prevent such misoperation, a supplementary starting boost is provided under these circumstances. Where the control signal represents the required position or acceleration of the table rather than its velocity, the pick-off 23 is replaced by a device responsive to the quantity controlled.
GB3850859A 1959-11-13 1959-11-13 Improvements relating to servo-controlled drives Expired GB911131A (en)

Priority Applications (2)

Application Number Priority Date Filing Date Title
GB3850859A GB911131A (en) 1959-11-13 1959-11-13 Improvements relating to servo-controlled drives
DE19601427114 DE1427114A1 (en) 1959-11-13 1960-11-12 Hydraulically operated feed device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3850859A GB911131A (en) 1959-11-13 1959-11-13 Improvements relating to servo-controlled drives

Publications (1)

Publication Number Publication Date
GB911131A true GB911131A (en) 1962-11-21

Family

ID=10403931

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3850859A Expired GB911131A (en) 1959-11-13 1959-11-13 Improvements relating to servo-controlled drives

Country Status (2)

Country Link
DE (1) DE1427114A1 (en)
GB (1) GB911131A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4136302A (en) * 1977-01-10 1979-01-23 Fellows Corporation Control system for machine tool with hydraulically stroked cutter

Also Published As

Publication number Publication date
DE1427114A1 (en) 1969-03-27

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