PWM control for single AC motor?

[Ger21]

So how do I control such an AC motor via PWM? Figured someone on here must have experience with this!

Many thanks :)

With a Super PID. But it's really not worth it for a cheap router. For a little more money, you can get a chinese spindle and VFD.

[AcrimoniousMirth]

Looked that thing up before, looks pretty awesome! But yeah, this is just an entry level machine and I’m working my way up as budget/use allows.
I considered a spindle but they’re about 300W for the same price as the 710W router and the VFD is a lot more of the cheap ones just use a potentiometer, so manual control.
As I plan to allow the motherboard to handle speed I needed to do t somewhat differently but as in my other reply I think I have the solution.
An interesting investigation for me to do would be to check the possibility of integrating a speed sensor to PID control it.

[Desertboy]

If going the Arduino route you're better off with grbl and a uno/cncshield combo, they're super cheap I paid <£10 for mine on ebay from UK seller.

https://blog.protoneer.co.nz/grbls-p...speed-spindle/

You could also use a variac to control the speed.

Good luck with your build.

[AcrimoniousMirth]

If going the Arduino route you're better off with grbl and a uno/cncshield combo, they're super cheap I paid <£10 for mine on ebay from UK seller.

https://blog.protoneer.co.nz/grbls-p...speed-spindle/

You could also use a variac to control the speed.

Good luck with your build.

I've actually already got one of those for about £4. It seems very... lacking. With the RAMPS1.4 I can add LCD and SD control, better processing and a tonne more peripheral pins if I need them. As Marlin is based on grbl it holds a lot of the functionality and holds a CNC configuration option anyway. So overall it looks like the better option.
Yes, a variac, but see, I'm trying to control the speed automatically. If I wanted to manually control it I'd just move the existing control box to a remote location. I've since solved this issue (run motor as DC via bridge rectifier).
Nevertheless, thanks and thanks again for the good wishes, I'm sure I'll come across a few issues along the way :)