spindle rotation

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larryl
Posts: 5
Joined: Tue May 03, 2016 12:18 pm
Allin1DC CNC Controller: No
CNC Control System Serial Number: a900508
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CNC11: Yes
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spindle rotation

Post by larryl »

i would like to invert the spindle signal -+ for m3 m4 using dac out lug78 dac com lug79 is this possible thank you. ( -10 cw +10 ccw, instead of 0 10 and inverter rev, inverter fwd.)
cncsnw
Posts: 3763
Joined: Wed Mar 24, 2010 5:48 pm

Re: spindle rotation

Post by cncsnw »

I do not know what "lug78" and "lug79" are.

The usual spindle DAC output on the GPIO4D (H6, terminals 11 and 12) cannot provide a bipolar (+/-) output. It can only provide a 0-10V output.

If you are not using all four axis outputs from the GPIO4D (H14 - H11), then you can use one of the spare axis outputs (typically the fourth one, on H11) for your spindle analog output instead.

This requires custom PLC programming, to calculate the appropriate bipolar DAC value based on speed and direction; to write it to the correct address for the axis analog output; and to turn on that axis enable whenever the spindle is enabled.
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