B Axis homing
01 Jun 2021 02:18 #210844
by vedatech
B Axis homing was created by vedatech
I'm in the planning stage for the limit switches and homing sequence for my ZBCW four axis machine. The Z, C and W axes seem straight forward but B is causing me to scratch my head. The problem is that the B travel is +/-60 degrees from a vertical home position. I cannot use one of the end points as home because the X position cannot be homed unless B is vertical and if X is unknown then sending B to an endpoint may cause it to crash.
I still need limit switches at +/-60 degrees for safety so I can't turn them off.
I could possibly have a +/- signal to show which side I'm on.
Any suggestions?
I still need limit switches at +/-60 degrees for safety so I can't turn them off.
I could possibly have a +/- signal to show which side I'm on.
Any suggestions?
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01 Jun 2021 05:37 #210858
by scotth
Replied by scotth on topic B Axis homing
Home at approximate "0" with a long cam covering 60 degrees of your travel one side or the other from 0. If you are off the home switch, travel + to home. If on the switch, travel - to clear and home at first marker pulse. A standard home sequence should work.
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01 Jun 2021 14:34 #210896
by vedatech
Replied by vedatech on topic B Axis homing
I like that solution. I'll use a precision optical switch and a custom encoder disk as the 'cam'.
Thank you.
Thank you.
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