Spindle speed control pictures. This is the speed control that comes with the 600W spindle from Aliexpress. Trying to figure out if it’s capable of being controlled by PWM or at minimum on/off from software.
Does this unit work? That cap above that TO-220 power component looks puffed up to me. It is tough to tell from the top though. I’d bet dollars to donuts that part is beat. I circled it in red here
Might just be the angle of the photo. I’ll take a look next time I’m out there, but it does work…or did the last time it was hooked up.
I just looked at your picture with the circle to be sure I was looking at the same thing. I think it’s just a reflection of the lighting on one of the facets.If not, it’s an easy swap.
@Carl_Fisher
Yeah I could not be positive from the angle of the picture, but from what I am seeing it sure looks bad so far to me. The plastic sheath is looking like it is coming up along with the can. Sitting next to that TO-220 power package I’d say that cap is right in the line of fire in that circuit too. So it is going to see more stress. If you have an ESR meter that is the final word on the matter. To me any puffy cap is crap though.
The cap could be bad and the unit still working. It would just allow more ripple through that could cause problems for other components in the circuit. Such issues would be worst at max load. I would change it.
On the label it says “10V speed” so I would guess it can control the speed via that input - but I also guess that it’s a 0 -10v signal, not PWM.
… so a DAC is needed.
You can RC low pass filter the PWM to get a DC control voltage, but it will max out at your logic supply voltage (3.3 or 5V). Still, it will let you test with PWM.
@Henrik_Larsen
You’re right. That part is just a high ESR component now.