Some new developments. The motors I had wired up to the tinyg were 0.9 400 step per revolution steppers. They were moving pretty well, but I wanted to ensure that they were always powered during my tests. Somewhere along the way in tinkering with them they overheated and melted almost entirely through the 1/4" delrin mount. So, I had to build new mounts, haha.

At any rate, the 400 step steppers I had just didnt have enough torque to hit the target rapids I was looking to achieve (250mm per second) So, after building new mounts I installed 1.8 (200 step) steppers from my old shapeoko which seem to pair very nicely with the tinyg and hit the target speed no sweat.

I am in the process of formalizing a test suite to use, but I have done some preliminary tests and was pretty surprised at what appeared to be very favorable results. I even moved all the weight of the gantry out near the passive rail and still had near perfect results. If that is the case, these tests may be fairly boring as I am only able to test to about 50 microns, and if the cheap chinese rails are testing consistently within 100 microns I dont know how much more perfect I would expect to find. I still intend on working my way through all the rails with actual repeatable test cases. Not too far off.