Appendix 1.20.2 Setting Compensation Data - Mitsubishi Electric M700VS Series Setup Manual

MITSUBISHI CNC
Appendix 1 Explanation of Parameters

Appendix 1.20.2 Setting Compensation Data

There are two systems for setting the compensation data: absolute system and increment system.
"#4000 Pinc" 0: Absolute system
1: Incremental system
(1) Absolute system
In feeding from the reference position to each division point as in Fig. 2.1,
the difference between a commanded position and an actual machine position is multiplied by 2, and the result (in
unit of output) will be a compensation amount.
For example, when the machine is actually positioned at 99.990mm while commanded to +100mm,
the difference between 100000 and 99990 is multiplied by 2, then the result, 20 pulses, will be set as a
compensation amount at the +100mm position.
When the machine is actually positioned at -99.990mm while commanded to -100mm,
the difference between -100000 and -99990 is multiplied by 2, then the result, -20 pulses, will be set as a
compensation amount at the -100mm position.
+99.990
(2) Incremental system
In feeding from division n-1 to n when the machine is in the positive direction from the reference position, as shown
in Fig. 2.2,
"division interval - actual movement amount" is multiplied by 2, and the result (in unit of output) will be set as a
compensation amount.
(3) In feeding from division n+1 to n when the machine is in the negative direction from the reference position, as
shown in Fig. 2.3,
"division interval + actual movement amount" is multiplied by 2, and the result (in unit of output) will be set as a
compensation amount.
n- 1
l
Fig. 2.2
Unit : Unit of output
Range : -128 to 127
(Note) The unit of output is used as the unit of setting.
The actual unit of compensation pulses depends on the compensation
488
- 100
Compensation
amount:
20 pulses
(10um) Compensation
amount:
-20 pulses
(-10um)
+100
Fig. 2.1
n
n
Fig. 2.3
- 99.990
l
n+1
n: Division point
compensation number
l: Division interval