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could use some help with a diy belt grinder

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Neubert1975:
Hi all
I have made my self a belt grinder, and after the build i found out that i needet a larger drive wheel, wich i made.
But i have a problem, when i start the motor the belt pulls to the motor side, and when i turn it off it wants to run of the grinder  :bugeye:.
Belt is 3x72" mortor 2 Hp drive wheel 190mm

Any idears what wrong here ?

Arbalist:
Crowning the wheels will help but you'll probably need some kind of tracking adjuster as well.

Neubert1975:
Hi
Thank you for the reply.
There is an adjuster wheel the one hanging near the motor, it is crowned some, but i dont know if its enough ?

bertie_bassett:
from looking at the pic, it seems tht your tension adjuster isn't parallel to you other wheels,( looks like its drooping from here)
that would easily make the belt run uphill towards the motor whilst running.

with regard to crowning, I think Arbalist was meaning the main drive wheels, not the adjuster. though while it may help the belt stay centralised, I think it would also ruin the flat surface I assume you require for a belt grinder.

as Arbalist also recommended, a tracking adjuster may well be what is required to actively hold the belt in the right place.
maby 2 rollers would be best, one each side of the belt, possibly fabricated into your tension adjuster?

trapper:
Normally theres two rollers one has adjustment so after you have put a new belt on you can start it then adjust the roller until the belt goes central-if your is doing what you say it is the rollers

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