Thread: New 72x2 Grinder WIP in Aus.

With the ability to drive the motor so fast, I think a small drive wheel would be the ticket.

Originally Posted by bluesman7

With the ability to drive the motor so fast, I think a small drive wheel would be the ticket.

Not really required mate, now I have the potentiometer and the settings set right I have it maxing out at 3000 rpm & can control it down to nothing until I reset my lowest limit to about 300rpm which should be about right for the Belt surface speeds

Potentiometer installed, tool rest completed today & the external run & kill switches are half sorted ready.

Originally Posted by Substance

Not really required mate, now I have the potentiometer and the settings set right I have it maxing out at 3000 rpm & can control it down to nothing until I reset my lowest limit to about 300rpm which should be about right for the Belt surface speeds

Yeah but.... The hp that the motor can deliver without overheating is directly linear with the speed, probably a little worse than that since the motor is fan cooled by a fan that runs at motor speed. So if your motor is rated at 2 hp at 50hz, it would be 1 hp at 25hz. For a given load, the motor will run cooler when at higher rpms for the same hp load. (lower torque)

That said, the load on my motor seems very low at low belt speeds so you may be just fine as is.

realized I forgot to take some completed works photos
so unfortunately it looks second hand already even with the nice flash (ah hack) paint job I gave

Restoring a Mini I see there Dion?

Yeh mate it's the only car small enough for the misses (4'11") that she feels comfortable in,
Another joy to play with in the back ground.