15. Configure motors, encoders and limit switches in software
8. Configuring backlash compensation
A note on backlash and backlash compensation:
Before configuring the backlash compensation in the control, every effort should be made to
reduce the mechanical lash in your machine to less than .001”. The “electronic” backlash
compensation provided by the control will help, especially in point to point moves, but the
overall accuracy of your machine is determined purely by the amount mechanical lash in the
machine.
NOTE: Before measuring backlash, make sure any existing backlash compensation is
removed. As shown below, always use MDI and slow feedrates when measuring
backlash. If you jog or use faster feedrates, your measurements may be inconsistent
due to the inertia of the table.
To enter backlash compensation values:
Press F1 -Setup
→
F3 Config, password = 137, Press enter
→
F2 Mach
→
F2 Motor
9. Configuring limit switches
Double check to confirm that all axes now move in the
correct directions, if any do not, perform the procedures in section 15.5 again. When all
axes are moving in the correct directions, jog all axes to the middle of their physical travel
and press the “alt” and “i” keys simultaneously to display the real-time I/O screen.
For each axis:
Trip a limit on an axis -if you tripped the + limit, it should only let you move the opposite
(minus). If it lets you move positive while the plus limit is tripped - your limit is setup
incorrectly in software. If the limit is setup incorrectly in software, switch the limit and
home inputs for that axis in motor configuration:
F1 -Setup ->F3 Config (pw=137)->F2- Mach-> F2 Motor
For instance, if the limits and home for the axis in question are currently 1 for – and
2 for +, change it to 1 for + and 2 for – under limits and home.
When you have done this for all axes and confirmed that the limit switches are configured
correctly in software, motion and limit configuration is complete
Power off the control
Spindle
1. Zero indicator and axis
2. MDI G1 X- .025 F.5
3. MDI G1 X0 F.5
4. Read indicator to measure
backlash
5. Enter backlash amount
Содержание GPIO4D
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