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Vard
12-03-2012, 04:42 PM
Hi everybody. I am beginner at CNC and EMC2 and need some help.
My CNC kit is Probotix and it works with EMC2. But in the kit's documentation there is no home switch configuration, only limit switch is there. Here is the links of the kits documentations:

PBX-2 CNC Parallel Port Breakout Board User Manual (http://probotix.com/manuals/PBX-2_manual.htm)
http://www.probotix.com/diagrams/4-A...ng_diagram.pdf (http://www.probotix.com/diagrams/4-Axis_ProboStep_wiring_diagram.pdf)

Please help me how to configure to get home switching. Thanks in advance.

Swarfing
12-03-2012, 10:37 PM
You decide if the switch is a home or limit by selecting what it is in the control software config.

Vard
13-03-2012, 05:04 AM
You decide if the switch is a home or limit by selecting what it is in the control software config.


Thanks for advising.

NB70
13-03-2012, 07:42 AM
You can also use switches as both home and limit, that is how I have mine set up.

Vard
13-03-2012, 08:57 AM
You can also use switches as both home and limit, that is how I have mine set up.

Ok. Can you show/tell me how to wire your mode?

NB70
14-03-2012, 05:32 PM
Just wire it as shown in the pdf diagram in post#1.
Then set input pins 11 as "Both Limit and home Z", 12 as "Both Limit and home Y" and 13 as "Both Limit and home X" in the parallel port page of the EMC2-stepconf program.

When the EMC2 (its now called linuxcnc) is in homing mode it will move each axis in turn in its specified homing direction until it trips the limit switch and then slowly back off the switch until it opens again. Be careful to set the direction of home search velocity as negative if your home switches are located at the axis minimum, & make sure your emergency stop is working before you test the homing procedure!



Ok. Can you show/tell me how to wire your mode?

Vard
14-03-2012, 07:32 PM
Just wire it as shown in the pdf diagram in post#1.
Then set input pins 11 as "Both Limit and home Z", 12 as "Both Limit and home Y" and 13 as "Both Limit and home X" in the parallel port page of the EMC2-stepconf program.

When the EMC2 (its now called linuxcnc) is in homing mode it will move each axis in turn in its specified homing direction until it trips the limit switch and then slowly back off the switch until it opens again. Be careful to set the direction of home search velocity as negative if your home switches are located at the axis minimum, & make sure your emergency stop is working before you test the homing procedure!


Thank you very much. Your explanation really works!