- Joined
- Feb 13, 2017
- Messages
- 2,138
Since a VFD cannot be used on a capacitor start motor, there are only two choices: Find a 6 pole motor to run 1200 RPM range. Or rig larger/smaller pulleys to lower speed. Going to a three phase motor and a VFD is an option, but quite costly when compared to another level of belt reduction.
There is one other option, but it requires a little(?) machine work. A while back I built a 3:1 reduction gear for a Chinese lathe.
http://www.hudsontelcom.com/9X20Gear.html
It would involve changing the belts and sheaves to a smaller profile. No biggie but added costs for a proper sized belt. Sheaves can be made from 1/4 inch plates. 3:1 would allow use of a faster motor, 2 pole, 3600 RPM class if that is a option. Going to an existing size belt with a larger pulley looks, to what I see, like it is not really a simple solution. My solution is crude but easy to do.
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There is one other option, but it requires a little(?) machine work. A while back I built a 3:1 reduction gear for a Chinese lathe.
http://www.hudsontelcom.com/9X20Gear.html
It would involve changing the belts and sheaves to a smaller profile. No biggie but added costs for a proper sized belt. Sheaves can be made from 1/4 inch plates. 3:1 would allow use of a faster motor, 2 pole, 3600 RPM class if that is a option. Going to an existing size belt with a larger pulley looks, to what I see, like it is not really a simple solution. My solution is crude but easy to do.
.
