2+2+3 More Plasma builds, double the joy ! 3X2M and 2.5X1.5M cnc plasma build.

that is definitely moving. Nice

tommylight wrote:

Yup i did think about doing just that, but i have not belt to do both sides for now.
And the ringing was there because the belts were very loose, now they are tight as a drum, so no ringing, and no vibration.

Tommy - in the middle of working out belt tensions and measuring real travel v”s requested travel to tune step scale.  Can you give anymore guidance on what “tight as a drum” means? Eg no more than X mm’s droop with a 1kg weight? 

Also on your pulleys did you loctite them on to help avoid any shift?

thanks - J

Exactly, at 3.3 meters i had it so it does sag 10mm with 5kg load.
That was more of a "feeling" thing than any math or static calculation.
Be aware that my belts were of very good quality made by PowGe, China, 15mm wide HTD3 type, stainless steel reinforced, so they can withstand huge amounts of tension.

Thanks. I'm running the same 15mm PowGe steel reinforced belts. My runs are much shorter. 1.3m on X and ~650-700mm on Y.

For that short length, no worries, not much flex there even when not tightened much.
Have you tested the belt yet? I did hang my full weight on it, could not feel it stretching at all.
That is two belts holding 86Kg. Was scared to try just one!

Did a test last night and had 22m of sag. Having to come up with a way to get significant pretension on the belt before clamping it into the tensioning system. But i have a plan to try today. Will try and post a pic if I can manage it with only 2 hands.