Xinje DS5F-43P0-PTA - Appendix 7. Application Example

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Appendix 7. Application example
Mode 6: Pulse instruction position mode
1
23
A
B
E
F
G
H
D
C
Equipment introduction:
This is a welder. Workpiece 1, 2, 3 are the object to be operated. 2 and 3 is fixed on B and A
individually. A and B can whole move and be pushed by ball screw E and F. The screw pitch is 5mm.
C and D is servo motor. G and H is reducer. The deceleration ratio is 40.
It needs to adjust the machine with standard dimension workpiece and find the origin of A and B.
Workpiece 1 lies on the worktable and moves left and right. Its dimension is positive tolerance, cannot
shorter than standard workpiece. The process to put the workpiece is random. It requires that the left
and right soldering is symmetrical.
A and B move toward 1 with 3 and 2 at the same speed. Whatever the position of 1, 2 or 3 will touch 1
at first and push 1 to another side until 2 and 3 all touch 1. The result is the motor torque will increase.
At this time, 1 will at the symmetrical position.
A and B will return to the origin position after soldering is finished.
Analysis
1. Make sure the work mode: 6
2. It needs to judge whether 2 and 3 touch 1 when finding the symmetrical point first time. The sign is
servo output torque will increase. It needs to use torque limit (P3-28, P3-29) and torque limit output
signal /CLT.
3. As the dimension of workpiece 1 is larger than standard, offset pulse will remain in servo when the
symmetrical point is found. /CLR signal can clear the pulse. The servo motor running distance is
different from PLC pulse number. If it needs to know the actual distance, servo encoder feedback
/A+, /A-, /B+, /B- and AB phase count are needed.
4. The machine motion direction of A and B.
Signal and terminal
/COIN positioning finished signal: SO1
/CLT torque up to upper limit output: SO2
/CLR pulse offset clear input: SI1
Encoder feedback signal /A+, /A-, /B+, /B-
Calculate the electronic gear ratio
Step
Explanation
Ball screw
1
Confirm the mechanical specification
Ball screw pitch: 5mm
Reduction ratio: 40/1
2
Confirm the encoder pulse number
131072
3
Decide the command unit
1 command unit: 0.001mm
4
Calculate the motion value of load
shaft rotate 1 circle
5mm/0.001mm=5000
5
Calculate the electronic gear ratio
625
16384
5000
2
17

A
B
6
Set the user parameters
P0-13=16384 P0-14=625
P: pitch
P
1 rotation =
Command unit
P
Load shaft