Geeetech A10M belt tensioners (X and Y)

thingiverse

These X and Y axis belt tensioners will give users better control over their belt tension for example reducing artifacts like ringing or layer shifts. They are also much easier to print than some very fancy designs that require you to print screws sideways. This is a remix of two sources from different authors, so check the info. What I changed is adding screw holes that allow you to fixate the tensioners to the extrusions. You can reuse the original T-nuts as well as M4 and M5 screws used for the stock belt tensioners! I also remixed the 2020 / 2040 extrusion inserts with tighter tolerances and a better fit. You will need M5x25 (or longer) screws for the idlerslider, just like in the original designs. A hex head is ideal but mine with a round head work fine too. You might need a longer belt for the Y axis, but you might also be able to stretch it with the stock belt. It helps to loosen the Y axis stepper motor so that you can first wrap the belt around the front end then around the motor end. It works very well on my Geeetech A10M. I haven't tested it on the A20M, but it should be perfectly compatible. Print orientations are as saved for all files. If you want, you can add support to the brackets, however they should also print without if you want to save some time. Make sure to put a fat brim around the brackets to avoid them coming loose from the build plate. They are tall thin parts with little bottom surface area.