AZSMZ Mini, LCD, and Stepper Woes...
Posted: Tue Mar 15, 2016 2:24 pm
Pulled from another thread for more exposure. I nearly have 626Pilot's fork of Smoothieware working for my ex-Micromake Kossel Mini. Here are my remaining issues:
1. About 10 seconds into a print, my LCD screen (viki2 compatible - shipped with AZSMZ Mini) goes completely blank. I need to do a complete power cycle on the board to restore any graphics on the screen. A simple reset won't do...
2. My extruder stepper motor is acting very "jerky" or "jittery". Its movement is not smooth, and my prints appear very under extruded. they look a lot like this: http://d33v4339jhl8k0.cloudfront.net/do ... 1Ah4bz.jpg" onclick="window.open(this.href);return false;. I worry that the 1/32 microstepping on the DRV8825s is the potential culprit. Any idea how I may change microstepping on only one motor on my AZSMZ Mini? Is there code I can put into my config to change microstepping for individual motors? As far as I can tell the DRV8825 needs pins M0, M1, M2 drawn high or low to engage a specific microstepping mode. See here http://reprap.org/mediawiki/images/c/c3/AZSMZ_2.1.png" onclick="window.open(this.href);return false;, looks like all the M pins are hard-wired to be drawn high, which based on this https://www.pololu.com/product/2132" onclick="window.open(this.href);return false; indicates 1/32 microstepping. Guess I might have to do some rewiring for the extruder. What else could be the problem here?
FYI, all 4 of my stepper drivers have VREF set to 0.5V which should correspond to 1A to the steppers.
1. About 10 seconds into a print, my LCD screen (viki2 compatible - shipped with AZSMZ Mini) goes completely blank. I need to do a complete power cycle on the board to restore any graphics on the screen. A simple reset won't do...
2. My extruder stepper motor is acting very "jerky" or "jittery". Its movement is not smooth, and my prints appear very under extruded. they look a lot like this: http://d33v4339jhl8k0.cloudfront.net/do ... 1Ah4bz.jpg" onclick="window.open(this.href);return false;. I worry that the 1/32 microstepping on the DRV8825s is the potential culprit. Any idea how I may change microstepping on only one motor on my AZSMZ Mini? Is there code I can put into my config to change microstepping for individual motors? As far as I can tell the DRV8825 needs pins M0, M1, M2 drawn high or low to engage a specific microstepping mode. See here http://reprap.org/mediawiki/images/c/c3/AZSMZ_2.1.png" onclick="window.open(this.href);return false;, looks like all the M pins are hard-wired to be drawn high, which based on this https://www.pololu.com/product/2132" onclick="window.open(this.href);return false; indicates 1/32 microstepping. Guess I might have to do some rewiring for the extruder. What else could be the problem here?
FYI, all 4 of my stepper drivers have VREF set to 0.5V which should correspond to 1A to the steppers.