Andrew Davie wrote:FlyMario wrote:smeezekitty wrote:It does sound like you would benefit from more torque (not more speed)
I have a new 2000 rpm motor. Ordered a 20 tooth and 50 tooth pully which should be in tomorrow. If I do my math right, that setup should give me 800rpm. Hopefully, I don't lose much torque by slowing the motor down to a resulting 750rpm.
The original motor is 1000rpm directly driving the disk down to 750rpm. That is quite a difference.
Peter
My experience/experiments with toothed belts (if I understand the use of your 20/50 tooth pulleys) is that they are *incredibly noisy* at the speeds for NBTV.
I pretty quickly abandoned toothed belts for smooth pulleys and an oversized O-ring as used for underwater sealing in submersibles. This worked extremely well.
Fascinating. I expected the exact same thing. But oddly enough my setup is actually nearly silent. Hopefully, I can post a video of it later.
Check out this hack of a test.
And the Drive...
A little frustrated because I am having to run the motor at over 12v (13.2) to get it near 750 rpm. I wanted the hole machine to run at 12vdc. Hoping that my RPM indicator in Arduino just doesn't have a good resolution. 1 pulse per second can make it appear 660rpm or 720rpm LOL.
May need to change the gear ratio later. Worrying too much about something I don't even have accurate info yet
Pete
Peter J. Fischel
Mechanical TV Fan, Programmer and Tinkerer.