Error in calibration X motor

Hi,

i finished to assembly the printer, I updated the firmware at the last version uploading the following firmware:

1_75mm_MK2-MultiMaterial-RAMBo13a-E3Dv6full.hex

and during the selftest I saw the x motor sobbing and have difficulties, it doesn't move fluently and made mini step ahead and back continuously and a lot of noise too. if it helps I catch a video.

After a short time the printer shows me an error message:

Selftest error !

Please check :

Endstop not hit

Motor X

How can I solve It?

Thanks

Massimiliano

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Hi Jakub,

today I replaced the MiniRambo board with the new one received from your support team.

Unfortunately I still have the same issue, I think it depends from the X motor, I made a test releasing two teeth of the belt and I broke the x-carriage, photo added.

After this accident I disassembled the x motor from the placement, I removed the GT2-16 pulley, I connected the X motor at the Y socket, then I connected the Y motor at the X socket and I tried to move the axis (see video added).

As you can see the shaft of the X motor it doesn't rotate.

Now I have two questions for you:

1) how can I block the belt with the broken x-carriage or how should be possible to receive a new x-carriage

2) Do you agree with me that the problem is generate from the X-motor? Could you substitute It?[video|36][image|10225][video|37]

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6 Answers

Hi Massimiliano,

isn't the belt on X-axis too tight? You can try to release the belt by a two or three teeth and see if it helps. If not, please record the video.

Thank you

Jakub

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Hi Jakub,

was one of the first things I tried, this is the result.

With the printer off the movement of the motor looks fine, free, and the extruder move with few efforts if I move the axe of the motor or the belt

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Hi Massimiliano,

This can be caused by two things:

First try to check if the endstop is working properly. With printer turned off, set the extruder in the middle of the printer, turn the printer on and head to the Menu -> Calibration -> Show end stops

You should see following:

Block Image

Value 0 means endstop isn't triggered, value 1 is for pressed (triggered). Therefore you should see 0 and you can also check the endstop by pressing the button on it with a finger, the value must change to 1. If this is not working, check the wiring including proper connection. If the issue persists, contact our support.

Second thing to check is the motor wiring, it can happen it is partly broken or the pins inside connector aren't plugged correctly. Check the cable, check the connector and you can also try to replug X motor to Y motor socket to see if it behaves the same. If the issue persists, contact our support.

Please let me know if you have solved it ;)

Jakub

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I made both the tests.

The endstop works properly, the motor Y plugged in the X socket presents the same issues, the motor X plugged in the Y socket works properly.

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Hi Massimiliano,

I discussed your issue with our support team and the suggestion is to try if you can move with the motors using printer's menu.

Go to: Settings -> Move axis

If not, the hardware might be faulty. In such case please contact our support at info@prusa3d.com, include this link and ask for our technician Tom. He knows what to do ;)

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Hi Jakub,

today I replaced the MiniRambo board with the new one received from your support team.

Unfortunately I still have the same issue, I think it depends from the X motor, I made a test releasing two teeth of the belt and I broke the x-carriage, photo added.

After this accident I disassembled the x motor from the placement, I removed the GT2-16 pulley, I connected the X motor at the Y socket, then I connected the Y motor at the X socket and I tried to move the axis (see video added).

As you can see the shaft of the X motor it doesn't rotate.

Now I have two questions for you:

1) how can I block the belt with the broken x-carriage or how should be possible to receive a new x-carriage

2) Do you agree with me that the problem is generate from the X-motor? Could you substitute It?

Block Image

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Hi Massimiliano,

as I wrote earlier, this seems to be beyond repairable just by firmware flashing or correct cable connection. Please write to support once more, I assume the motor wiring or the motor itself are somehow damaged.

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Hello. I'm having the identical problem.

Can you please advise.

Update (08/20/2017)

Ah, solved it: wiring issue!

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Massimiliano will be eternally grateful.
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