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Tension Adjustment - Dewalt 788

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Forum topic by Mordi posted 02-14-2015 02:14 AM 1703 views 0 times favorited 9 replies Add to Favorites Watch
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Mordi

34 posts in 778 days


02-14-2015 02:14 AM

I can’t seem to get enough tension on the blade on my Dewalt 788. Is there a simple way to adjust the tension?

I see an allen screw in the upper blade holder. Does that have something to do with the blade adjustment? Wondering if the screw backed out a little over time from tightening and loosening? And, if I turned the screw, would I get more tension from the blade…

Thanks,
Mordi


9 replies so far

View distrbd's profile

distrbd

2228 posts in 1913 days


#1 posted 02-14-2015 02:31 AM

Push the upper head down slightly ,then tighten the clamping knob,then dial it to #4 or #5.
click on Dewalt tune up ,there’s tons of good info there.
http://www.scrollsaws.com/

-- Ken from Ontario, Canada

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Mordi

34 posts in 778 days


#2 posted 02-14-2015 02:49 AM

I am doing as you prescribed, but the blade does not tighten enough, even with the tension all the way to the right.
Thanks for the link. Will check it out.
Mordi

View MrUnix's profile

MrUnix

4244 posts in 1666 days


#3 posted 02-14-2015 07:47 AM

Doesn’t moving the lever to the left increase the tension?

I don’t have the dewalt, but i’ve used them before.. when installing the blade, move the tension lever all the way to the right, push down slightly on the upper arm and then clamp the blade. After that, you move the lever to the left to get the correct tension.

Cheers,
Brad

-- Brad in FL - To be old and wise, you must first be young and stupid

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Mordi

34 posts in 778 days


#4 posted 02-14-2015 04:09 PM

Sorry, but I meant to say with the tension adjusted all the way to number 5 (which means moving the lever to the left) there is still not enough tension.
Mordi

View distrbd's profile

distrbd

2228 posts in 1913 days


#5 posted 02-14-2015 04:58 PM

I have not done this myself but have read that if you take apart the tension knob/switch assembly you can re adjust the bolt that holds the tension lever on.
http://www.scrollsawer.com/forum/www.scrollsawer.com/forum/general-scroll-saw/55313.htm

-- Ken from Ontario, Canada

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Mordi

34 posts in 778 days


#6 posted 02-15-2015 09:32 PM

Thanks to all that responded. I appreciate all the suggestions.

The article on the dewalt tuneup had a section on this very problem. Seems it is quite common. I tightened the tension lever one turn and that seemed to work. So far so good….

Mordi

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Mordi

34 posts in 778 days


#7 posted 02-15-2015 11:13 PM

ok – not so good after all. I checked the tension with the saw off….

When I turned on the saw, the speed control is not working. It is running at high speed and will not slow down.

Any ideas anyone?

Thanks,
Mordi

View distrbd's profile

distrbd

2228 posts in 1913 days


#8 posted 02-15-2015 11:59 PM

Blow some compressed air in and around the switch,then turn it on and check it out .
Most DW788 owners cover the on/off switch (leaving only the speed control exposed) with some clear packaging tape or a piece of rubber glove in order to stop saw dust creeping inside the switch .
you can then invest in a “dead man foot switch” to turn the saw on and off.

-- Ken from Ontario, Canada

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Mordi

34 posts in 778 days


#9 posted 02-16-2015 12:05 AM

Son of a @#$% – that worked! Thank You!!!

I did purchase a dead man foot pedal – I am going to wrap some shrink wrap around the switch and install the dead man. I guess I should stop looking at a replacement machine – The excalibur ex-21 sure seems nice….

Mordi

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