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General Category => General Scroll Saw Talk => Topic started by: txwoodrat on December 26, 2010, 10:38:28 pm

Title: Speed problem on 788
Post by: txwoodrat on December 26, 2010, 10:38:28 pm: :( Hi all, this is my first post and it is a little problem with my 788. It's not a year old yet and cut beautifully but I can't run it at full speed, the 8 setting. It vibrates and is very noisey. Runs perfect until I turn it up to 8. Any suggestions?
Title: Re: Speed problem on 788
Post by: Bill P on December 26, 2010, 11:58:33 pm: Has it always been like that, or is it a new development?

Bill
Title: Re: Speed problem on 788
Post by: scrollgirl on December 27, 2010, 08:22:06 am: I have had my DW for over 10 years and although I rarely run the saw that fast, it does tend to make more noise and vibrate a bit at that speed. I think it just reaches a certain frequency and resonance when it is at a high speed and it is the nature of the beast. I will be interested in what the other DW owners have to say about this too. As I said though, I never see a need to run the saw at full speed so I don't see it as a problem for myself.

I hope this helps. Sheila :)
Title: Re: Speed problem on 788
Post by: dgman on December 27, 2010, 10:31:10 am: I agree with Sheila, I never run mine at full speed. And yes, it does vibrate more at top speed. I'm on my second DW788, and I teach scroll saw at the local Woodcraft, and they all do the same thing.
I think if you have to run your saw at full speed, you may be using the wrong blade.
Title: Re: Speed problem on 788
Post by: GrayBeard on December 27, 2010, 10:32:41 am: Mine, though much more recent than Sheila's, does the same thing. Crank it wide open and it makes noise and shakes.
Same solution, NEVER run it wide open. When I have done so for a quick cutoff ot something it cuts OK, just sounds horrible!

~~~GB~~~
Title: Re: Speed problem on 788
Post by: Bill P on December 27, 2010, 10:56:39 am: I kind of wanted to say it's like that story where the patient tells his doctor, "It hurts when I do this" and the doctor say, "Don't do that."

I just wanted to be more P.C.

Bill
Title: Re: Speed problem on 788
Post by: edward on December 27, 2010, 02:33:06 pm: I have never run the saw at that high speed, really don't think it is necessary, I find that 1/2 that speed is good. Edward
Title: Re: Speed problem on 788
Post by: mrsn on December 27, 2010, 07:53:17 pm: I recently was moving things around in my shop and used my saw before it was totally bolted down. I was trying to see if it was at the right height since I got a new stool. The saw made a ton of noise and vibrated a lot, it all went away as soon as it was bolted secure to the table. That may help with your saw.
MrsN
Title: Re: Speed problem on 788
Post by: chief on December 28, 2010, 09:10:28 pm: Read here for the Dewalt tune-up and repairs. It explains some things that cause the knock and how to fix them.

http://scrollsaws.com/

Sorry bout that. Forgot the link.
Title: Re: Speed problem on 788
Post by: Crabbyboater on December 29, 2010, 12:18:56 am: Chief, you said "read here" in your last post. Did you mean to include a hyperlink in your message?