AZSMZ Mini, LCD, and Stepper Woes...

caall99
Plasticator
Posts: 13
Joined: Fri Mar 11, 2016 11:07 am

AZSMZ Mini, LCD, and Stepper Woes...

Postby caall99 » 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. 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, looks like all the M pins are hard-wired to be drawn high, which based on this https://www.pololu.com/product/2132 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.

WZ9V
Printmaster!
Posts: 65
Joined: Sat Jan 25, 2014 8:49 pm

Re: AZSMZ Mini, LCD, and Stepper Woes...

Postby WZ9V » Sun Mar 20, 2016 4:57 pm

That board is hardwired to 1/32 with 8825s and 1/16 with A4988 drivers.

The original Smoothie board uses A4982 which is the same family as the 4988 so you might try some of them before attempting to modify the board.


Return to “Smoothieboard and variants”

Who is online

Users browsing this forum: No registered users and 1 guest