CS-Lab CSMIO/IP-A

LIMIT and HOMING switches
On both – slave and master axes side – there should be separate LIMIT and HOME switches. The signals
should be properly set in Mach3 program („ConfigPorts and Pins”).
Before next steps it is necessary to verify if the signals are correctly configured (DIAGNOSTICS tab) Pay
special attention whether HOMING switches are not replaced. Pressing by hand the HOME switch on „X”
motor side the M1HOME should light up, presing HOME switch on „B” motor side - the M5HOME should
light up.
Axis direction settings
One of the most important issues is correct setting of movement directions for master and slave axes. In
our example drive is transmitted by toothed bars. In this case, usually there is need to change slave axis
direction. We can do it in „ConfigHoming/Limits” by setting „Reversed” at „B” axis. The direction can be
also changed in servo drive.
Manual feed test
When all the steps described above are already done, you can attempt to test the axis working in the man-
ual feed. A small note: At the beginning, the best is to set very low speed - even 0.5%. You should first
verify whether the motors are working on both sides and whether the feed goes in good directions.
Automatic reading of HOME switches position difference
Before we activate the mode slave axis with geometry correction, you should know what is position differ-
ence of HOME switches on master (“X”) and slave (“B”) side. Homing with geometry correction is about
that master axis always finishes homing at the moment it goes back off its HOME switch, and slave axis
goes to: [HOME switch back off position - correction]. If we gave zero correction initially and HOME
switches position on both sides differs by e.g. 10 mm - then there would be issues with gantry during hom-
ing.
To avoid this situation there is additional mode created - for HOME switches position difference measure-
ment.
In plugin configuration window for “X” axis in “Slave Axis Configuration” group enable the „Read Differ-
ence” mode and start homing. After homing is finished, open the plugin configuration window again and
in „Geometry correction” area there should be the value from the measurement.
CS- Lab s.c. – CSMIO/IP- A - CNC controller Page 108