Open Source Spindle Control

[rcpilot82]

I am wondering if there are any open source schematics or board layouts for spindle speed controllers? I would like to be able to adjust the rpm of my 110 vac spindle (1/2" router). Anything out there? It would be even better if I can set the rpm through Mach 3.

Thanks in advance!
Rob

[rcpilot82]

anyone???

[rcpilot82]

I found this online, not sure if it would be a good start...
AC Motor Speed Controller

[Al_The_Man]

What type of motor? Universal?
Here is one, but not open source.
http://www.cnczone.com/forums/diy-cn...ter_speed.html
For accurate control, a Universal motor requires feedback of some kind.
Al.

[rcpilot82]

The motor is a regular wood router so I would assume it is a universal.

I saw the super pid but was looking at making something myself and for less cash.

[Al_The_Man]

The link you show is the basis for most router built in speed controls, the problem with a Universal motor it has poor speed regulation with load unless feedback is used.
Al.

[rcpilot82]

I have sent an E-mail to the Mfg. to get more information about the motor.

[RomanLini]

Most of the routers now come with internal speed controllers, and they do a decent enough job if you don't need top-level performance. If you are after low-cost that would be the way to go.

The Colt routers use a simple current feedback that gives a decent speed control. The Hitachi M12VC comes with an internal closed loop control that works better still.