All Replies on Delta Mortiser Running in Slow Motion

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Delta Mortiser Running in Slow Motion

by bruc101
posted 09-16-2018 06:30 PM

10 replies so far

View lumbering_on's profile


578 posts in 1336 days

#1 posted 09-16-2018 06:38 PM

Have you checked the tension on the belts? Or is this a direct drive?

View a1Jim's profile (online now)


118134 posts in 4423 days

#2 posted 09-16-2018 06:51 PM

Many times problems like this pops up it involves sawdust clogging things up.


View runswithscissors's profile


3110 posts in 2871 days

#3 posted 09-16-2018 10:48 PM

Could be a start capacitor, maybe?

-- I admit to being an adrenaline junky; fortunately, I'm very easily frightened

View GR8HUNTER's profile


7776 posts in 1558 days

#4 posted 09-17-2018 02:26 AM

not a start cap from what he describes :<((

maybe motor cant breathe if it got hot :<))

-- Tony---- Reinholds,Pa.------ REMEMBER TO ALWAYS HAVE FUN

View bruc101's profile


1384 posts in 4388 days

#5 posted 09-17-2018 05:20 AM

Thanks guys for your replies. I’m going to open up the motor today and see what I can find. I’ll let you know.

-- Bruce Free Plans

View bruc101's profile


1384 posts in 4388 days

#6 posted 09-17-2018 07:12 PM

I was able to get the fan off the top and blow some air down into the motor. It acted like it wanted to pick up and go and then there will be a little bump and it starts slowing down again. The motor also starts getting hot the longer I let it run.

-- Bruce Free Plans

View DBDesigns's profile


232 posts in 843 days

#7 posted 09-19-2018 07:20 PM

This is a blind guess but it sounds like a bearing or some kind of drag on the motor shaft.

-- I remember when Grateful wasn't Dead

View waho6o9's profile


8939 posts in 3423 days

#8 posted 09-19-2018 07:36 PM

That’s odd.

Technical Support
Product Assembly, User or Other Product-Related Questions


Good luck

View pintodeluxe's profile


6204 posts in 3659 days

#9 posted 09-19-2018 08:31 PM

Clogged or bent mortising bit? Remove bit to rule that out.

Bad Run Capacitor? If yes, replace both capacitors.

-- Willie, Washington "If You Choose Not To Decide, You Still Have Made a Choice" - Rush

View bigblockyeti's profile


6717 posts in 2567 days

#10 posted 09-19-2018 11:39 PM

I believe those have a single capacitor, check it and replace if bad. I can’t remember if they have a centrifugal switch for the start windings but having that fail would result in slow running and getting hot quickly.

-- "Lack of effort will result in failure with amazing predictability" - Me

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