3rd try is the charm Mach3 Controllable PWM Spindle Motor Controller

[DaOne]

What frequency are you able to use with this circuit on the PWM setting in mach? I made a similar setup for a buddy using a DC SSR. The problem with the SSR is the frequency. and lower speeds you notice the lower frequency. Wondering how this performs.

[Zero Cool]

I will have to double check but i believe it is around 400hz. the higher in freq you go, the more motor heating you experiance due to the inductance of the motors coils. so there is a limit to how high of freq you can run. higher the freq, more power but higher temps also. so you have to play with it a bit. i think when i started i was around 100hz but i cant remember what the final number was i settled on.


Zc

[Jamuto]

Hi guys , im trying to set Mach3 to control Super PID, so far i have it running,but cant find the way to control the speed nor read it on Mach3. Ive been doing trial and error for over 8 hours now, and i ran out of options...my head hurts..
thanks for any help or tip on the matter.
Javi

[Sly]

 I plan on using a modified Dremel 395 as my spindle motor. I have removed the Dremels internal Triac based speed
control as the internal motor is a universal motor that will run on AC or DC. I added a IR LED and a Phototransistor to
the dremel motor to send a speed pulse back to Mach3. I removed the AC power cord and added a 5pin CB radio type
connector on the rear for the 2 wires for the motor and 3 for the speed sensor system(details on that later...thats next).

Hi Zero Cool!
Thanks to share this with us.
This is a really great schematic, I have looked for during 3 days before finding something interesting,
so do you have more info about the IR LED and the phototransistor?
I am ready to order at Digi-key but I don't want to send my order before be sure about the ir led and phototransistor.

I see that the post is almost 1 year old but I wish to have some news soon
Thank you  and have a great time
Sly