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As some of you know, I have wanted to stop managing H-M for some time.
It's a tremendous strain on my personal life. I want to set up my own shop.
In September, September 15, to be exact, it will be 8 years that Hobby-Machinist has been in existence.
I have been training VTCNC to run things here. Dabbler is going to learn too.
I feel that they are ready to start taking over the operation.
I will be here to help in case they need, but I don't think they will.
Tony Wells is and will be here also to consult with.
I will be doing backups, upgrades, and installing addons.
Other than that, I will not be around.
I am leaving this place in good operating condition, and financial condition.
Thanks for letting me know. Just tried it and it works for me, but will list the data here. Toshiba 3 phase, TEFC, 60 HZ, 1175 rpm, 230/460 V, 57/28.5 amps, 6 poles, max ambient temp 40 deg C, time rating-continuous, frame 286T, service factor 1.15
Never heard of a 6 pole motor being used for a RPC, but I don't know why it wouldn't work. I suspect the reason that they are not used is because they are not very common, and more expensive than a 4 pole motor.
I've built RPCs with both 3450 and 1725 rpm motors, and they worked exactly the same. A slower speed motor develops higher torque to deliver the same power as a higher speed motor, so the rotor will be heavier. I think that accelerating the heavier rotor puts more stress on the starter capacitor and that the heavier rotating mass helps when starting a run motor under load like a compressor or hoist. That's seat of the pants observation, not the opinion of a trained electrical engineer.