bot wrote:That is super awesome. I hope the Rambo doesn't hiccup with the added steps on larger prints. (Are you still running a rambo?)
I read that it might be an issue on the Rambo, but I wanted to test it before installing the smoothieboard. That print was at 40mm/s, I'll try a larger print at 40 then start bumping up the speed.
3D-Print wrote:Awesome. That looks great!!! I agree it will be interesting to see a larger print.
So it really does appear to be the steppers..... such that each step results in an amplified yet slight non-linear movement at the end of the arms. This non-linear movement, or vertical banding, is greatly impacted by calibration and print speed clearly as noted in this thread.
KAS, how much of the improvement do you think was due the steppers vs. the 16 tooth pulley size? With the standard pulley, how close can you get to 200 steps/mm without getting into trouble by adjusting the microsteps or etc? Just personally, not sure about those adjustments.
Just changing the pulley to a 16t would be 100mm/s. The .9 degree stepper on 20t is 160mm/s. Granted that's all on the Rambo so it's capped at 1/16 microstepping without going to external drivers. I plan on running this setup on the smoothie at 1/32 microstepping which is 400mm/s.
Honestly, if I can run 80mm/s towards the perimeter without issues, I might just stick with Rambo. Although curiosity is getting to me.