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Question on a AC/DC Electric motor
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larrybl:
Working on a 110V AC/DC motor for a vintage sewing machine, and got mixed results when operating it on ~30V AC and DC. As this has a 2 prong non grounded AC plug, should I modify this to run off of ~100 V DC? I don't think the hi-tech speed controller will care.

https://www.youtube.com/watch?v=aale0_4ke7w&feature=youtu.be
 
Benta:
It's just a universal motor. Run it on AC or DC as you want. If you're concerned about safety, add an earth connection to the case.

larrybl:
Thanks! I am worried more about safety.
Zero999:

--- Quote from: Benta on May 23, 2020, 10:13:00 pm ---It's just a universal motor. Run it on AC or DC as you want. If you're concerned about safety, add an earth connection to the case.

--- End quote ---
This. Run it from the mains, earth the case and use a GFCI.
larrybl:
Ordered a new drive wheel for the motor. Lots of sanding and varnish in the future.
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