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Messages - Don_L

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General Mach Discussion / Re: Maxnc
« on: October 31, 2005, 02:11:57 PM »
re: changing from PWM control of spindle to Step control
It works!
I already had step pin set to #1 ,but to keep motor from running all the time in PWM mode I had to turn step low active ON.  I ASSUMED (bad thing to do) that step control of spindle also needed it on too. After trying every combination possible I Finally turned step low active OFF and motor spins up and is adjustable.
Thanks
I left dir pin on 0 ??

2
General Mach Discussion / Maxnc
« on: October 28, 2005, 01:22:43 PM »
Mach3-setup: [Spindle Setup] [PWM Control]  setup for Maxnc CL
I am trying different PWM base frequencies  to control my Spindle motor speed. my 1/2 hp and 1/5 hp spindle motors seem to react the same to different settings. I don't know what minimum PWM% does so I left it at 0%. I don't know what anything else changes so no changes were made.  So far I have tried:
PWM Base freq               
5 Hz       motor surges  from such low frequency
25 Hz     motor not too shakey at low rpm -  good speed control
30 Hz     motor chirps like cricket at low rpms but ok- good speed control
50 Hz     motor  not very responsive to changing rpm setting  but very smooth

any suggestions for fine tuning for best motor life and control would be appreciated.
Also any other settings that fine tune for maxnc would be appreciated.

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