LumberJocks

Electric motor hums when I plug it in, before I start the switch, but runs fine when I start it

  • Advertise with us

« back to Power Tools, Hardware and Accessories forum

Forum topic by SteveHaf posted 12-01-2017 01:52 PM 334 views 0 times favorited 4 replies Add to Favorites Watch
View SteveHaf's profile

SteveHaf

6 posts in 260 days


12-01-2017 01:52 PM

Topic tags/keywords: scroll saw motor

I have a Delta 40-440 24” Scroll Saw. When I plug it in, the motor hums, before I hit the start switch. When I do hit the start switch, it seems to run fine. Any thoughts on what the cause is and how to troubleshoot and repair?


4 replies so far

View verdesardog's profile

verdesardog

167 posts in 2694 days


#1 posted 12-01-2017 02:20 PM

Could be a bad start switch….

-- .. heyoka ..

View WhyMe's profile

WhyMe

1034 posts in 1644 days


#2 posted 12-01-2017 03:09 PM

I don’t believe the motor should be humming before power is turned on. Has it just started doing this?

View Dustin's profile

Dustin

541 posts in 823 days


#3 posted 12-01-2017 03:14 PM

Ground loop?

-- "Ladies, if your husband says he'll get to it, he'll get to it. No need to remind him about it every 6 months."

View SteveHaf's profile

SteveHaf

6 posts in 260 days


#4 posted 12-02-2017 04:12 PM

I grounded the green wire in the start switch’s box. If it’s a bad start switch, could I use a simple light switch to test it? If yes, I’m not sure how to wire it – there’s a black, red, white and green wire coming into the box

Have your say...

You must be signed in to reply.

DISCLAIMER: Any posts on LJ are posted by individuals acting in their own right and do not necessarily reflect the views of LJ. LJ will not be held liable for the actions of any user.

Latest Projects | Latest Blog Entries | Latest Forum Topics

HomeRefurbers.com