Thread: GMC PT330 - Grabbing and gouging

I'd have no faith in that tab you mention. It's probably fairer to call it the "any thicker than this and it won't go through" tab.

Besides, it sounds to me like it may be taking off too much in a pass.

I assume that you're already tried raising the heads well clear of the workpiece and then slowly lowering them back down to see exactly where the feed rollers start to grab and what clearance margins you actually have?

When changing the blades, did you take a good look at the condition of the feed rollers, etc? No foreign objects wrapped in awkward places?

The bearing blocks that the feed rollers rotate in do get worn in the bore so I am wondering if the drive rollers aren't pushing down properly on the timber and loosing their drive. Does the timber move consistently through the machine or is it jerking? If it's jerking it could also point to a fault in the gearbox.
Make sure the bottom platen is clean and apply some wax to make sure it is slippery as sticky tables can also cause a few issues.

Originally Posted by Skew ChiDAMN!!

I'd have no faith in that tab you mention. It's probably fairer to call it the "any thicker than this and it won't go through" tab.

Besides, it sounds to me like it may be taking off too much in a pass.

I assume that you're already tried raising the heads well clear of the workpiece and then slowly lowering them back down to see exactly where the feed rollers start to grab and what clearance margins you actually have?

When changing the blades, did you take a good look at the condition of the feed rollers, etc? No foreign objects wrapped in awkward places?

That's what I thought about that tab! Made no logical sense to me, but being a first time user of this type of tool, thought I might be missing something. It states that it takes 2mm per full rotation, so I do a quarter turn or less.

It only grabs on the one side - left - and appears to do it even at a 0.5mm pass.

I saw a vid advising to check the rollers for resin buildup. I might give that a go next. I'm regretting this purchase, should have just bought a new one. I can't even figure out how to level the feed tables. Instructions found online are no help at all. Very frustrating

Originally Posted by Treecycle

The bearing blocks that the feed rollers rotate in do get worn in the bore so I am wondering if the drive rollers aren't pushing down properly on the timber and loosing their drive. Does the timber move consistently through the machine or is it jerking? If it's jerking it could point to a fault in the gearbox.
Make sure the bottom platen is clean and apply some wax to make sure it is slippery as sticky tables can also cause a few issues.

It does move consistently and doesn't appear to jerk at all. I will check the bottom plate as well. Thanks