[UM2 Extrusion Upgrade killed main PCB motor drivers!?]

Hi..i am new user here. As per my knowledge the motors won't move because of the stop switch. There's lots of possiblities. The most likely is that something fell in the hole where the stop switch is - lift your Z bed with 2 hands and look under it - there is a screw sticking very far down. Look where that screw will go - jiggle that stop switch - make sure you hear it click. Often a piece of plastic gets in there. If nothing obvious yet, take the cover off the PCB again and trace that cable.

 

Thats a really bad idea.

As I said already, I've measured the switch opening and closing from the mainboard. The microswitch is fine.

In fact, Its the act of moving the stage up and down manually that causes the back voltage that blows up the driver IC.

If you're going to manipulate the stage, make sure you unplug the motor first!!!

[UM2 Extrusion Upgrade killed main PCB motor drivers!?]

 

Nope - it was the A4988 motor driver chips on the main board.  The stop switches were fine.  I replaced the main board ($349!) and everything works again.

Anybody want to take a look at my old board?

 

Faaark! Exactly the same thing here, only it only one motor dead.

After installing the Kit, I get er05 or er06 depending on the location of the build platform. The switch is working and has continuity right through to the main board.

The instructions should tell you to disconnect the stepper motors before moving the platform and head.

This is terrible! I think Ultimaker should accept responsibility for the omission.

Bugger.

 

When simply moving the stage, I measured 16 volts peak to peak across the motor!

Theres a video here:

Looks like the the A4988 ic has no protection for voltage coming back from the motor.

I'd say there is a very real risk of blowing up the motor driver ic's when moving the motors.

Lindsay Robertson

Senior Technician (EAS) (NZCE)

Departmental Health and Safety Officer

Department of Psychology, University of Otago

Te Tari Whakamātau Hinekaro, Te Whare Wānanga o Otāgo

Godard Laboratories, Level 2, 95a Union Plc East

PO Box 56, Dunedin 9054, NEW ZEALAND

Tel 64 3 479 7668 Fax 64 3 479 8335

Website: www.otago.ac.nz/psychology

[UM2 Extrusion Upgrade killed main PCB motor drivers!?]

Nope - it was the A4988 motor driver chips on the main board.  The stop switches were fine.  I replaced the main board ($349!) and everything works again.

Anybody want to take a look at my old board?

 

Faaark! Exactly the same thing here, only it only one motor dead.

After installing the Kit, I get er05 or er06 depending on the location of the build platform. The switch is working and has continuity right through to the main board.

The instructions should tell you to disconnect the stepper motors before moving the platform and head.

This is terrible! I think Ultimaker should accept responsibility for the omission.

Bugger.