KMG questions - Noob Alert!

Forgot to post yesterday.

The volume only worked for the first 3 seconds so I couldn't hear the noise you were talking about.

Don't worry about the belt speed, you'll get used to it in no time.

-Josh
 
Total shot in the dark but that sounds metallic to me. I'll bet that oiling in fact took care of it.

At one speed there was a seconday sound that may have been comming from the belt and perhaps the belt needs to wear into the pulley a little ?????

Totally guessing, but I'd be CERTAIN the grinders bearings are properly lubricated before I ran it too much just to ensure you don't get premature wear on them.

Let us know how it goes.

-Josh
 
thanks a lot Josh, i did use A LOT of oil, i was cleaning it off the floor, the grinder, the table and myself!!

by wear in the pulley you mean like wedged bit more? on that new pulley its actually not flush, its about 2mm above the surface, needs to be flush?

thanks again :)
 
More trouble on the grinder front!! Trying the new pulley today, 3-4 minutes and the grinder stops, i check the inverter and its a 'motor overload' error, i dont get it and check the pulley and belt for contact and i discover THIS!!!
There is a smaller one at the other screw too!

Thank God i discovered it!!
20120804_115001.jpg

Josh, i think you were right(if i understood you correctly) there wasnt good contact between new oulley and belt, could that be the reason for the overload problem?
 
Should those be set screws instead of a hex bolt. I think the idea of a set screw is that one would likely twist the hex key before you would strip the threads on the pulley. Kind of a built in safety factor. I have been known to twist a few hex keys, so I speak from experience.
 
PT Doc said:
Should those be set screws instead of a hex bolt. I think the idea of a set screw is that one would likely twist the hex key before you would strip the threads on the pulley. Kind of a built in safety factor. I have been known to twist a few hex keys, so I speak from experience.
Click to expand...

i don't quite get what you mean about twisting the hex key
 
rhinoknives said:
Get some Link belt or Power Twist Plus from www.fennerdrives.com There are other makers too!

This stuff works great on any belt drive machine. Much smoother running and very quiet.
I use this on my Step pulley grinder, 6 x 48" Sander and Metal cutting bandsaw.


Laurence

www.rhinoknives.com
Click to expand...

thanks Laurence

i was actually thinking about buying them, the old belt was working fine, it was the new pulley that wasnt shaped right apparently
 
Glad you discovered those cracks before the pulley split in two !

FWIW- I think that pulley is too small of a diameter for that belt anyway. A linked belt like Laurence mentioned may be a good fix or replace both pulleys to larger sizes. If I remember right I think mine are about 7" on the motor and 3 1/2" on the driveshaft so the small one is big enough not to "pinch" the belt tighter than it wants to be.

The excessive belt tension needed for your current combination may very well be the cause of your overload problem. I've tripped the overload a few times on my VFD and it appears to happen when I have a situation where there's too much friction between the grinding belt and platen which puts "drag" on the motor. This type load in the grinders drivetrain added to the load from actually grinding will overload the VFD in just a few minutes of grinding.

Good luck with a replacement pulley !

-Josh
 
thanks a lot Laurence and Josh

i got a new one will have shaped slightly larger, what i also discovered that the pulley wasnt shaped correctly, the V was uneven, the belt wasnt flush, pretty much anything that could possibly go wrong with it happened i believe lol

IF the new pulley doesnt work, i'll either buy a new one online or pay extra and avoid the mental hassle and use the old pulleys and get motor with higher rpm, which i think would be slightly more costly than buying online

and i already plan on buying the twist belt, thanks for the tip :)
 
You must log in or register to reply here.
Back
Top