Best Rotational Speed for a home made watch parts cleaning machine.

[Paul80]

Hi all

A quick question I hope 

I am building a small watch parts cleaning machine, I have a controller that does time and rotation direction but does not do speed control so it will be fixed by the motor I buy.

So the question is whats the best RPM to sellect for the motor, 60 rpm, 120 rpm or something else.

Thanks for any input on this.

Paul

[SwissSeiko]

What is the motor you are using to drive it? Brushless? Stepper? I think 60rpm is too low. 300rpm would be a good start

[valleyguy]

Someone's  posted a table of speeds and  times for wash and rinse cycles in this forum, i can't find  the post but from memory i think it was 200 rpm.

You should include a dc speed controller to your set up i have one of these in my homemade cleaner,  inexpensive and you have more choice of 12v motors as it lets you adjust the motor speed to get the best results in your set up.

This as a switch for manual forward  and reverse, i have the output of this that goes to the relay input of an automatic forward reverse circuit set at ten seconds, the forward reverse module can be swithched out with a DPDT switch so you can control the motor directly for spinning excess fluids off at the end of a cycle.

 

Edited December 6, 2024 by valleyguy

[Neverenoughwatches]

Honestly the adjustment of speed is so useful, in that wash, spin and drying cycle speeds  can vary. Handy when you're making something that may not be as stable as a commercial machine. If you have a wobble somewhere thats proving difficult to cure and a slower speed can address that problem, so then an addition of speed control can give you that fix.

[praezis]

You also could use such simple speed adjustment as Elma did: A variable resistor (rheostat) in series with the dc motor: slow speed in the fluid, high speed over the fluid for spinning, without further adjusting.

Frank

[Malocchio]

2 hours ago, valleyguy said:

Someone's  posted a table of speeds and  times for wash and rinse cycles in this forum, i can't find  the post but from memory i think it was 200 rpm

JohnR posted this somewhere else

[valleyguy]

Thanks Malocchio, That's the chart i remember.