Spindle encoder ideas needed

[EddyCurrent]

I'm assuming you want to measure speed ?

Your VFD may have an analogue output that can be set proportional to the speed.

Or a motor similar to this should act like a generator if it is driven by the spindle. I don't know if it is possible to attach it to the spindle shaft though on your machine.
http://www.amazon.com/20000RPM-1-5-3.../dp/B00D0W6W5M
The ouput would be proportional to speed. If you could find a 5v or 24v that would be ideal.

But maybe you are just looking for an index pulse for each revolution ?

[Jonathan]

If you actually need an encoder, then look in the first post on my build log as you can see in the photo the encoder I used and how I mounted it to the 24000rpm spindle:

http://www.mycncuk.com/threads/6484-...strong-machine

If you just want a measurement of the spindle speed, then fashioning a single pulse is probably easier. Be careful not to add anything which could imbalance the spindle...

[Boyan Silyavski]

Hi,
Jonathan, i remeber your build, i looked around and the encoder was around 60-70euro. I was thinking of something like :

http://www.ebay.es/itm/Photoelectric...3984c5d&_uhb=1


http://www.ebay.es/itm/Arduino-Photo...51f752c&_uhb=1


or to fashion something from these:

http://www.aliexpress.com/item/DC-10...723604177.html



One interesting i found was there very cheap magnetic sensors encoders /~10.000rpm max/ that count the teeth of a pulley, just an idea for a cheap closed loop.

[vre]

http://members.shaw.ca/swstuff/spindle-encoder.html