Craftsman 2x42 platen problems

[JG Custom Metal Works]

I have the ceramic glass platen attached and there was no problem with that. The problem is that the actual platen arms aren't stiff enough to hold the platen even with the belt. I bent it to the point where it was lined up great but then after grinding it pushed back to being uneven. I wasn't pressing terrible hard either.

I was trying to think of a way I could brace the non-supported side of the platen, possibly a length of lumber wedged in there. It wouldn't be precise but if it would work it doesn't really matter. I ruined my first knife due to a failure in my jig setup but this one is purely mechanical(which is very frustrating since I thought I had corrected everything).


Anyway, you guys haven't let me down yet with great advice so I figured I'd dump another doozy on ya. Would really appreciate help fellas.

 

[KUNTZI66]

I've had the same problem. I'm looking for some angle and a way to make a new platen . The way I manage now is, I don't lean on it so hard go slow and work on my technique. I'm almost ready to upgrade so Im not to stressed with it.

 

[JG Custom Metal Works]

Unfortunately I don't have the option to upgrade as I'm just getting setup.

 

[Jeremy Barnard]

I just used it as it was when I had the 2 x 42. If you freehand you can move with the flex.

 

[JG Custom Metal Works]

I just used it as it was when I had the 2 x 42. If you freehand you can move with the flex.

I don't think I could "move with the flex" the way this is becoming uneven. What happens is that the blade only pushes the belt to the platen on the left side of it. In order to have the belt reach the platen on the right(as to "move with the flex") I would need to push harder which would cause unevenness in the grind as well. Urghhh... shit just never works the way it's suppose to. I'm about ready to throw the whole damn thing against the wall.

 

[Jeremy Barnard]

I don't think I could "move with the flex" the way this is becoming uneven. What happens is that the blade only pushes the belt to the platen on the left side of it. In order to have the belt reach the platen on the right I would need to push harder which would cause unevenness in the grind as well. Urghhh... shit just never works the way it's suppose to. I'm about ready to throw the whole damn thing against the wall.

To be fair those machines aren't meant for grinding metal. My unit has some flex but never bent as you describe.

 

[JG Custom Metal Works]

To be fair those machines aren't meant for grinding metal. My unit has some flex but never bent as you describe.

I understand that but this is all I have to work with at the moment. Just wondering if others have run into this issue and if so what they did to remedy the problem.

 

[KUNTZI66]

All I can think of is weld or jb weld some square stock, make a triangle on the platen instead of an L. if that makes sense or make a new heavy platen from 3 in angle.

 

[JG Custom Metal Works]

That sir is a great idea. Thank you!

 

[redd1981]

Im just curios how you are able to push the workpiece hard enough to bend the platen and not completely stall the belt?

 

[Omega Leather Works]

All I can think of is weld or jb weld some square stock, make a triangle on the platen instead of an L. if that makes sense or make a new heavy platen from 3 in angle.

When you say triangle, are you referring to a support gusset? I'm trying to figure out in my head how the platen on that machine is set up. Is it like a 1x30 where the platen is basically an "L" where the bottom is simply bolted to the machine, or some other way...?

I guess when I buy one I'll find out, but it couldn't hurt to try fixing the problem in my head before I run across it.

 

[JG Custom Metal Works]

Im just curios how you are able to push the workpiece hard enough to bend the platen and not completely stall the belt?

It doesn't happen all at once but over time. At first I noticed my blade grind starting to be off so I concentrated on my technique and it got worse. That's when I found that the platen was no longer true.

 

[KUNTZI66]

Also what works is I used I think 2 - 3/4 thick ceramic tiles glued to the platen, that pushes the platen further back on the bolt in turn giving it more stability. These platens do have play, they are far from stout.

 

[Omega Leather Works]

I think that tells me all I need to know. Creatch, if you get it figured out, let me know what you did.

 

[JG Custom Metal Works]

Well what I've done has been to straighten the platen out as best as possible and just press on it very lightly. I also pay close attention to the grind lines and check to see if the platen is severely crooked every now and then.

There is another thing I will aware you about with this grinder. When you attach the ceramic platen be sure to line it up with the belt. Also, if you're using a jig that will index off of the metal platen make sure and attach the glass one so that it evens up with the same spot on either side of the blade. It's kind of hard to describe and I will take pictures later if you want. If you don't plan on using a jig then you won't have to worry about it.

I hate being the guy that has to ask for help. My expertise lies with reloading, casting lead bullets, long range rifle shooting, NFA items, and other gun stuff. This whole knife making thing is new to me and I definitely appreciate the help. We all have to start somewhere I suppose....

 

[Omega Leather Works]

I totally understand. I have a lot of knowledge on certain topics, and can help people with those, but I often feel like a knuckle head here. I at least bring the perspective of a collector to the table, but you're right, you gotta start somewhere. It's okay though because I think we all enjoy learning. Otherwise we probably wouldn't be here.

Thanks for the tips on the platen. Pics would be fantastic if you get the time.