Dewalt scroll saw

  • Advertise with us

« back to Power Tools, Hardware and Accessories forum

Forum topic by Betsy posted 02-16-2014 09:29 PM 2180 views 0 times favorited 10 replies Add to Favorites Watch
View Betsy's profile


3391 posts in 3865 days

02-16-2014 09:29 PM

Okay, so my lack of mechanical know-how will be on full display again. My scroll saw has popped the fuse button. Ive pushed it back in and the machine comes on for a millisecond and pops again. On most things when the fuse pops, you push it back in and you go on your merry way. The electic outlet happens to be the only thing on the particular breaker so I know there is not an overload on the breaker (I’m actually pretty amazed I thought to check that!) The machine is proabably 10 years old and has set unused for probably 2 years in the unheated garage.

Any thoughts on what could be wrong?

Thanks in advance.

-- "Our past judges our present." JFK - 1962; American Heritage Magazine

10 replies so far

View MalcolmLaurel's profile


298 posts in 1592 days

#1 posted 02-16-2014 09:46 PM

Unless saw is too big for the breaker (what size breaker, and how many amps does the saw draw?) you’ve got a short somewhere. First make sure it’s not in the line to the outlet by seeing if the breaker pops when the saw isn’t plugged in. If it doesn’t, try it with the saw plugged in but not turned on. If the breaker pops then the short’s in the cord, if not it’s somewhere inside the saw.

-- Malcolm Laurel -

View lew's profile


12019 posts in 3725 days

#2 posted 02-16-2014 10:53 PM

Try the saw on another circuit (one controlled by a different circuit breaker). Sometimes breakers get “weak”. Maybe the breaker is a GFI (keeps you from getting electrocuted) and there is a grounding problem.

-- Lew- Time traveler. Purveyor of the Universe's finest custom rolling pins.

View scrollingmom's profile


1161 posts in 2433 days

#3 posted 02-17-2014 03:10 AM

I’m not sure where you live, but it something sits here for very long mud-dobers will build a nest in anything. The other thing is that there maybe some dust or dirt buildup and is creating an ark.

-- Kelly, Allen,KS

View HerbC's profile


1744 posts in 2829 days

#4 posted 02-17-2014 05:50 AM


Assumption: you have a Dewalt DW788 scroll saw. If any other model this may not be applicable.

If I’m reading your description correctly, the “fuse button” that you say is “popping” is the overload protection fuse, located in a fuse holder in the right rear of the unit, under the motor. It should be a 3 amp fast blow fuse. If it’s blowing the motor is trying to draw more that 3 amps. Check the mechanical linkages and make sure everything moves freely and is not binding up. Also lubricate any points that normally need lubrication. Pull the brushes on the motor and check them for wear and to ensure they are not jammed. Make sure the motor shaft turns freely.

The fuse is “popping” instead of the circuit breaker in your panel tripping because the fuse is designed to protect the motor by opening the circuit when the current exceeds 3 amps. Your circuit breaker is designed to protect the circuit wiring between the outlet and the panel by opening the circuit when the current exceeds 15 amps (or 20 amps in some circuits)...


Be Careful!


-- Herb, Florida - Here's why I close most messages with "Be Careful!"

View Betsy's profile


3391 posts in 3865 days

#5 posted 02-17-2014 07:35 AM

The saw for sure does not pull more than the 20 amp breaker should be able to handle.I’ve plugged several other things into the outlet with no problem. I did a careful look at my cord and found no breaks, cuts or abasions and the plug itself is tight as is the connection to the unit.

I tried the saw on 3 adfitional outlets that I know are on different circuits, same thing happens.

Herb, I’ll start to give the machine a good cleaning and will dig out the manual to see about the brushes. Thanks for the help.

-- "Our past judges our present." JFK - 1962; American Heritage Magazine

View Loren's profile (online now)


10283 posts in 3617 days

#6 posted 02-17-2014 09:01 AM

Dust maybe. Open the casing and clean it out with compressed
air if needed, or a little brush.

Modern low voltage electrical switches are pretty robust. I’ve
owned 50 or more machines and while I like the clean attitude
of “replace” as a pragmatic matter I find I can usually get
things going. You could have oxidized copper contacts.

Those saws have a variable speed thing and I think that
means a DC motor. That speed dial apparatus may be a
weak link in any motor control that has one.

View Jim Finn's profile

Jim Finn

2648 posts in 2891 days

#7 posted 02-17-2014 01:20 PM

Check out the switch. DeWalt in known for switches that fail.

-- Website is

View jerrells's profile


918 posts in 2854 days

#8 posted 02-17-2014 01:52 PM

One last suggestion to add to the excellent ones above. See if you have a “scrollers club” near you. There are always very well trained persons in those clubs. Give it a try.

-- Just learning the craft my Lord and Savior Jesus Christ practiced.

View Betsy's profile


3391 posts in 3865 days

#9 posted 02-18-2014 05:03 AM

Thanks for the suggestions. I’ve been so busy this week I’ve not had a chance to revisit the isdue except to check the breaker and the outlet itself. I’ll be spending time on this over the weekend when I can put more than a couple of minutes into it. I’ll let you all know how I make out.

Thanks again.

-- "Our past judges our present." JFK - 1962; American Heritage Magazine

View WildmanJack's profile


33 posts in 1555 days

#10 posted 02-18-2014 11:42 PM

I have had the same problem but my 788 uses the old glass fuses. I found that it only popped the fuse when I used a foot pedal! Took the foot pedal off and the saw hasn’t stopped yet. Why??? I have no idea. The foot switch was just a simple micro switch By the way, I used the exact same foot switch on my Excalibur Scroll saw and it worked just like it was supposed to. Tried it on about 4 other tools and had no problem but man that 788 sure didn’t like it. I checked the micro switch with a volt meter and it didn’t have a short, took the saw to the local service center and they said there was nothing wrong with it. It’s still a mystery to me but now I don’t use a foot switch on the 788 anymore…

-- Just an old banjo player tryin my hand at woodworking.

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