Question on a AC/DC Electric motor

[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]

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.

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.