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Delta Mortiser Running in Slow Motion

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Forum topic by bruc101 posted 09-16-2018 06:30 PM 443 views 0 times favorited 10 replies Add to Favorites Watch
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bruc101

1260 posts in 3743 days


09-16-2018 06:30 PM

I’ve got a Delta Mortiser that I bought several years ago. I’ve not used it in several months due to having a more powerful one.

Yesterday I started to use it, and when I switched it on, it ran in slow motion and kept getting slower. The motor also warmed up more than usual so I switched it off.

Anyone have any suggestions as to why and a fix for it?

I’ve got it set up to run only 3/8” mortises.

Thanks in advance.

-- Bruce Free Plans http://plans.sawmillvalley.org


10 replies so far

View lumbering_on's profile

lumbering_on

574 posts in 691 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

a1Jim

117328 posts in 3778 days


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

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

-- https://www.artisticwoodstudio.com/videos wood crafting & woodworking classes

View runswithscissors's profile

runswithscissors

2892 posts in 2226 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

GR8HUNTER

5124 posts in 913 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

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bruc101

1260 posts in 3743 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 http://plans.sawmillvalley.org

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bruc101

1260 posts in 3743 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 http://plans.sawmillvalley.org

View DBDesigns's profile

DBDesigns

183 posts in 198 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

waho6o9

8519 posts in 2778 days


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

That’s odd.

http://www.deltamachinery.com/support/customer-support

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

1-866-999-1499

Good luck

View pintodeluxe's profile

pintodeluxe

5798 posts in 3014 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

bigblockyeti

5285 posts in 1921 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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