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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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reversing AC motors?
Hi,
I'm looking around motor for a grinder. someone pointed out that compressor-duty motors are non-reversible. I didn't think this an issue previously, but it occurs to me that if I build a buffing wheel opposite the grinder, off the same motor, for each to run in the proper rotation I would have to reverse the rotation of the motors. Assuming a conventional, reversible motor (I'm not on the question of compressor motor or not here), does this involve rewiring the motor each time? Even if just 10 minutes of work, it would be a nuisance; since it would not just be a one-time rewiring, but every time I want to switch between machines. Could I build a simple device that would rewire it by flipping a switch, if this is the case? btw, how much more efficient is 3 phase over 2? It seems a converter is affordable off of ebay, and it looks like it would make every subsequent motor cheaper, and/or more efficient and smoother-running? thanks! -Bernard Arnest |
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