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paulychr

stepper controller broken

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For about 15 months we were very happy with our Ultimaker2 printer, and amazed by the quality of the prints.

However, recently, it startet to make problems:

Sometimes the printtable moved down few cm during a print, with the print "hanging in the air" afterwards.

Sometimes, the table also moved very fast during init...

Very recently, also the y-axis started to make problems, with the printer suddenly making a larger step in Y, and the print afterwards "hanging in the air" again.

Today now, suddenly the extruder motor stopped working, and the controller-ic from extruder1 is getting very hot directly after poweron, independently wether the motor is connected or not.

Obviously, the controller board is broken :-)

How can one quickly get a new controller board, and is this maybe (after 15 months) still covered by warrenty ?

Would it otherwise make sense to try to change only the stepmotor ics (A4988) on the board ?

But so far i could find no vendor offering this chip with acceptable delivery times.

Any help or advice is very welcome, we need the printer back working as fast as possible :-)

Best regards,

Christian

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I do not think it is covered, you should also replace the stepper motors while your at it. But, before you do anything attempt to fix it like this:

1. Replace the A4988 stepper drivers

2. Replace the Stepper Motors

3. Replace the Control Board.

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One question. What's the room temperature? This started when the heat arrived or earlier?

Um2 boards have the stepper chips soldered, they can't be easily removed (unless you have the skills).

Also it seems you have two different problems. First the extruder skips. Does it make a hard 'toc-toc' noise when that happens?

The y problem. Did you made any firmware change? It's the room temperature higher than before? Just to remove the chance try to place air moving bellow the printer. Just in case.

The feeder. It might be skipping because the ptfe coupler life might have come to his end. That's a easy part to replace and if that's the problem it will come back to print just as good as before (it's a consumable that has X amount of life depending of the temperature used).

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