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dw788 motor is bogging down

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Forum topic by JustLearning posted 04-29-2016 11:29 AM 626 views 0 times favorited 6 replies Add to Favorites Watch
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JustLearning

2 posts in 219 days


04-29-2016 11:29 AM

Topic tags/keywords: dw788 motor bogs down motor tension scroll saw question help learning new dewalt 788 dewalt blade tight

Purchased a supposedly nearly-new Dewalt 788 within the past year. We haven’t used it much at all yet. Noticing that the motor is bogging down when blade tension is increased. What do I need to know to overcome this motor bog down issue?

https://youtu.be/iXAdwGqY0YM

The above link is to a video of the saw bogging down when using tension control.


6 replies so far

View distrbd's profile

distrbd

2227 posts in 1908 days


#1 posted 04-29-2016 02:00 PM

Is that happening while you are cutting or it bogs down as soon as you increase the blade tension?
Increasing the tension should not cause the motor to bog down.
The speed control on the Dewalt 788 is known to be problematic, sawdust can creep in it and cause it to fail, maybe that’s the problem with yours, try blowing some compressed air in there and see if it changes anything.

Try scroll saw .com site,there are many members there who own that model of scroll saw ,maybe they’ll know what’s going on with yours:
http://forum.scrollsawer.com/

-- Ken from Ontario, Canada

View tomsteve's profile

tomsteve

393 posts in 680 days


#2 posted 04-29-2016 02:04 PM

welcome to the forum. im thinking a video of exactly what youre experiencing may be helpful. my old 788 would have a change of sound with different blade tensions, but never had a problem with speed slowing down. im thinking a video of what your experiencing may help.

only thingmi could think of causing what im picturing is a bearing problem, but id like to see and hear a video.

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JustLearning

2 posts in 219 days


#3 posted 04-29-2016 06:32 PM

https://youtu.be/iXAdwGqY0YM

https://youtu.be/iXAdwGqY0YM

Here’s a video of what is going on! I would appreciate all thoughts and considerations!

View distrbd's profile

distrbd

2227 posts in 1908 days


#4 posted 04-29-2016 08:52 PM

Does it bog down without the blade? I’m thinking maybe the bushings on the (upper or lower)blade holder are sticking?
Try to duplicate the problem without the blade.
I would try to contact Rick(if possible) and ask him what he thinks causing the problem:
http://www.scrollsaws.com/

-- Ken from Ontario, Canada

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tomsteve

393 posts in 680 days


#5 posted 04-30-2016 05:32 PM

huh! as ken said, check it without the blade.does it operate allright when cutting?
you have something binding somewhere.
rick would be the man to contact.
another forum to check is

http://www.scrollsawvillage.com/forum

View Mark_E's profile

Mark_E

1 post in 99 days


#6 posted 08-27-2016 03:58 AM

Also check the connector going to the speed control under the black cover. I’ve seen an instance where someone had a similar problem and the connector/wires was loose.

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