Slow start with the head stock.

godavid2 · Post by **godavid2** » Thu Dec 13, 2012 7:06 pm

I was using my sanding disk to sand some wood and the head stock was slow to start. Is that a pretty common characteristic of the motors? The head stock is a 95'. thanks

beeg · Post by **beeg** » Thu Dec 13, 2012 7:33 pm

No it's knot. WHEN was the last time ya did maintenance?

JPG · Post by **JPG** » Thu Dec 13, 2012 7:52 pm

The steel sanding disk presents considerable inertia to get it up to speed. That inertia will expose any start up issues.
The relatively slow speed for disc sanding should however prevent slow start ups.
Are the belts slipping?
Are you 'fully powered'? Good power source with adequate 'ampacity'?

garys · Post by **garys** » Thu Dec 13, 2012 9:34 pm

Before you shut down, crank the speed down. Then, the heavy disc sander should spin up fast and you can crank the speed to whatever you want.
It all comes down to 7th grade science class. Mechanical advantage, pulleys, etc.

godavid2 · Post by **godavid2** » Fri Dec 14, 2012 9:02 am

Thanks for the replies guys. I will check the belts. I'm not sure I paid too attention in my seventh grade science class so I might be in trouble

godavid2 · Post by **godavid2** » Thu Dec 20, 2012 6:34 pm

I checked the Poly V belt and it was loose. So I loosened the lock screw on the idler shaft and turned the eccentric bushing clock wise until it stopped and then tightened the bushing bolt. The book said don't over tighten. The bushing makes a clicking sound when tighten down. When I back it off the belt tension does not hold. Is the bushing bad and is it hard to replace? thanks

JPG · Post by **JPG** » Thu Dec 20, 2012 7:47 pm

godavid2 wrote:I checked the Poly V belt and it was loose. So I loosened the lock screw on the idler shaft and turned the eccentric bushing clock wise until it stopped and then tightened the bushing bolt. The book said don't over tighten. The bushing makes a clicking sound when tighten down. When I back it off the belt tension does not hold. Is the bushing bad and is it hard to replace? thanks

Lock Screw

Bushing Bolt

The Lock screw(set screw only accessible from only one rotational position) should be snugged down only.

The bushing bolt(screw/split lock washer/nut) needs to be tightened only enough to fully compress the lock washer.

The eccentric should be rotated til the poly-v belt is taught(about 1/4" deflection when pressed with finger).

Make sure the main shaft pulley set screw is tight and on the shaft flat.

godavid2 · Post by **godavid2** » Thu Dec 20, 2012 8:13 pm

Check, Check and Check! I took some tension off the belt and tighten the bolt down till the lock washer was almost flat and it is still making the click noise.

JPG · Post by **JPG** » Thu Dec 20, 2012 8:18 pm

godavid2 wrote:Check, Check and Check! I took some tension off the belt and tighten the bolt down till the lock washer was almost flat and it is still making the click noise.

OK! What is clicking? Could it be the lockwasher 'ends'?

You are trying to get good tension, why are you relieving it?

Clicking when tightening?

godavid2 · Post by **godavid2** » Thu Dec 20, 2012 8:37 pm

It seems when I tighten the bolt down and tension the belt I get this clicking from the area of the eccentric bushing. I can push the belt in a good 1/4 in. if not more.