Hi there.
I’ve only had my 50w CO2 laser for about a month now (bought secondhand).
Its a chinese copy of the omtech 50w maker model, i believe. It has the KT332N controller.
After I tightened up the timing belts, I made a mistake and therefore the X-axis belt has been rolling into the bearing, causing it to floss in the downward facing side.
2 questions:
What belt do I buy for my machine? (lenght etc) (i’ve tried googling the “HTD 3M” with no luck.
is there a way to center the belt on the roller-bearing?
Hope that some of you are able to help out a newbie.
I’ve attached 2 pictures.
1 of the writing on the belt and 1 of the worn belt next to the roller causing problems. (i believe that i might have tightened it too much before and 1 hour job). In the picture, i just moved the belt up, so it didnt roll onto the edge of the roller.
A casual look says those are all specific-tooth closed belts, but you want a length of the stuff, but knowing what you want makes it easier to find the right item.
However, given that this is a second-hand machine, it may have the wrong belts for the pulleys: if the belt tooth profile doesn’t match the pulley tooth profile, the belt will never operate correctly. That Gates listing has a link to an invaluable design guide telling you far more than you want to know about belts, but pay attention to the Tooth Profiles section on page 177.
The idler pulley (on the far end of the belt from the motor) has a tracking adjustment, probably two screws through the frame pulling a saddle holding the pulley. Their intent is to tilt the idler pulley so that one edge of the belt rides tighter than the other: the belt will tend to move toward the tight side.
The adjustment should have the belt lightly touching one flange. Tweak the tracking while running the laser head back & forth until the belt rides in the center of both pulleys. After that, it will (uh, should) gently ease over to one side without trying to climb out.
That assumes the motor & idler pulleys are properly lined up, which may be wrong. Compare their position relative to the linear guide bearing: they should both sit at the same distance from it and the belt should be parallel to the bearing.
Thats a truly dedicated response. Thank you so very much!
Regarding the idler pulley, i’ve tried everything i could (and yes its 2 darn screws) but for some reason i couldnt keep the belt straight. I seriously considered to drill a hole on top, tap it, and put a bolt down to “pressure” the pulley downwards.
But maybe with the new belt it will work, we will see.
I got so far to find out that i need the 3m belt and 1500 mm long and 15 mm wide. sooo… lets see what Temu can offer