Belt drive table

[Old Iron]

I thought this might help someone on their table.
I pulled some needed maintenance on my table day before yesterday and been having cut failures.
What happened was, I had the belts a little too tight and it changed the travel distance which I adjusted but still had problems.
After resetting the tension on the belts a little everything is back to cutting fine.

[Largemouthlou]

I have belt driven gear reduction, knock on metal I haven't had to mess with them in a while. At this point I figure if it ain't broke don't fix!! LOL

Thanks for the heads up though

[Bigdogbro1]

I also run 3:1 reduction to belt drive custom table design. All works well but you need to keep the belts adjusted to the proper span distance tension and if it's a double Y-axis drive system you need both belts adjusted so the gantry is square to the table. When you adjust the tension on only one y-axis belt you will throw off the straightness of the gantry to the table because the belt will stretch or shrink a bit on that one side. My belt tensioners are designed to control the tension and to allow the entire belt (gantry side) to be moved to square the gantry.

I designed and I am making a 38" long series10 80/20 extruded aluminum bar system with a 1" travel dial indicator on one end to setup my axis's the same. At 36.00" travel the dial indicator will read .500" on the dial. I will run the axis command to run 36.00" and measure the actual travel of the gantry for both X & Y. Travel adjustments will be done in the stepper motor axis tuning steps. Yeah it's overkill but it was a fun project and fairly inexpensive to build. Using a four foot metal ruler probably would have been okay but I wanted something with better precision.

I will post the drawings and pictures soon.

You can see my table and belt adjusters here.
https://www.youtube.com/watch?v=D-mfRaXM3Og