OK, I’ve been beating my head against a wall and could use some suggestions. (Yes, I already considered “beat harder” and “drink heavily.”)
I’ve assembled my #CobbleBot , compiled and uploaded Marlin. Seems to power up fine, and the LCD display goes live. I’m getting no movement at all on any axes, whether through computer control (e.g. MatterControl) or through the LCD display/control. (I’ve tried taping down my limit switches, just in case the logic is inverted in my settings somewhere - nothing.)
I have a couple of reasons for thinking it’s a power issue, maybe a bad RAMPS board. The first time I powered it up, one of the 8825 drivers (the one on the X axis) burned out in a little puff of smoke. I’ve ordered a whole new set of 8825’s, but in the meantime I swapped the one from the second extruder onto the X axis. (To date, no more smoke puffs.)
Still no movement, though, and, I’m getting the display gradually fading out and becoming unresponsive. I tried pulling off all the drivers and disconnecting all the steppers, and the fading problem went away. I then reconnected a couple of drivers and steppers (the dual Z’s) and the problem didn’t seem to return. Unfortunately, I still have no control over the connected steppers. Connecting one more driver and stepper (in this case, the X) makes the fading problem return, but it takes longer to start fading, and takes longer to fade away.
So? Any suggestions? Bad RAMPS board, or something else going on?
