My all-metal i3 recently stopped accepting commands to move the X axis.

3D Printing
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1

My all-metal i3 recently stopped accepting commands to move the X axis. It started with a stuttering X and then nothing at all in any axis. The board is an MKS. It is made by SunHoKey. Could it be the motor (does one motor kill them all)? The board? Instantly dead drivers for all motors?

2

I would guess there’s something wrong with the board at the very least, and that something wrong may well have killed all the drivers as well.

It’s pretty tough to kill a stepper, and unless something inside the motor is shorting (which is unlikely) it’s probably not the motor itself that directly killed the board.

Do any of the FETs look damaged, or do they get incredibly hot when power is applied to the board but it is doing nothing? Have any of the capacitors popped their top? If so, you could try replacing the bad FET or cap, but if something in the power system has blown it’s likely that it killed the board as a whole on its way out.

3

Almost certainly the board, though perhaps you could try with just one motor connected (trying each one separately) to see if one of them is shorted out.

4

I am inclined to think its the board too. I will seemif SunHoKey will send a replacement. Otherwise it gets my Azteeg or another Smoothie. Bummer. I even custom cut a piece acrylic side panel to say ‘Najia I4’

5

It could be a driver. But it also might be a bad trace on the board.

6

1 short circuit due to 1 failed driver can easily kill all other drivers and the logic components on the board, but if it’s a swappable driver it could just be sucking up more current that will stop once it is replaced.

7

I pinged the vendor and asked for a replacement or to send it back for repair. What? Why? To make room for my new printers while it gets fixed.

8

Vendor won’t replace it…sigh…going to do it myself. Of course.

9

Check the 5v regulator - the steppers run on 3.3 v, so if your 5v is pulled a bit low the 3.3v regulator on the pololus will crap out. The knockoff pololus are especially bad, they skimp on the regulator

10

Either way I have to remove the bed and get to the board on the inside…groan…thanks Paul.