Replies

1. 
   jeff100 | Jul 04, 2007 09:13am | #1

   Bruce, I had the Jet Super Saw, the Jet version of the hybrid saw.  It has the same HP motor and the same 3/4" ribbed drive belt setup.  I can tell you this saw passed the 'nickel test'.  In case you don't know,the nickel test is standing a nickel on edge on the saw table, and starting the saw.  The nickel should stand on edge and not fall over during startup and not wobble while running.  As I said, my saw ran smoothly, easily pasing this informal test.  I had rewired my Jet saw to run on 220 volts instead of the 110 volts it came prewired for.  I'm sure you can rewire your Delta as well if you are running it on 110 volts.  The instructions for wiring it are usually inside the motor junction box cover where the cord goes into.

   I don't know that this makes the saw run any smoother, but it draws less amperage wired this way and startup is definitely easier.  My guess, and it's strictly speculation on my part without seeing your saw, is that your motor could be slightly out of alignment putting a slight twist or angle on the belt.  First, make sure the saw is level and well supported.  Check the motor and how it's mounted and make sure the motor pulley is in alignment with the arbor shaft pulley in all directions.  If it is, make sure the belt is not damaged, and make sure the belt is tensioned properly.  If those items are correct, try running the saw with a different blade, or no blade and make sure it's not the blade causing the vibration.  If all that is correct, then perhaps you have a bearing that's not well.  That's all I can suggest.

   Jeff

1. 
   BruceT999 | Jul 04, 2007 06:27pm | #6

   Thanks, I'd forgotten about the nickel test. Ran it last night and started and ran without the nickel falling, but knocked it down upon shut-off. I guess I just had an unreasonable expectation of no vibration at all.
   BruceT

1. 
   Knotscott | Jul 04, 2007 10:29pm | #7

   It's not uncommon for induction motors to have more vibration at shutdown due to "an occurance known as "regeneration" where the saw motor generates electricity when the switch is shut off. As the motor winds down it is actually a generator of sorts but can make enough current to trip the start/run capacitors and cause the shudder you describe. . As long as it's not vibrating alot during operation, and not vibrating grossly, I think I'd accept it as normal." (extracted from a post by Tom Hintz on Woodnet)Still a good idea to check belts and pulleys to be sure.

2. 
   tkbob | Jul 04, 2007 02:48pm | #2

   Hey Bruce, I have a delta hybrid and when I got it two years ago I did have a problem with vibration.  I had a delta rep come look at it and everything was ok but the belt needed to aligned, which he did for me.  I did end up tweaking it a bit more after he left.

   Now it runs nice and smooth.  I never tried the nickle test but I am going to have to try it when I get home :)

3. 
   wiskytango | Jul 04, 2007 04:18pm | #3

   bruce
   i have the same saw and have very little vibration.

4. 
   Vic Damone | Jul 04, 2007 05:34pm | #4

   When your done with the above tweeks remove the blade and start the saw. Any difference?

   Vic

1. 
   BruceT999 | Jul 04, 2007 06:22pm | #5

   Thanks, but it was the same with the original Delta blade.
   BruceT