steven.w24
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MK3S Kit Z Calibration Not Moving

Feb 18, 2019 12:43 pm

Hi

I'm new to prusa so if i say something wrong, please let me know.
But today i just finish building the MK3S and when it started the Z calibration, what was meant to be a moving up till the top of the frame, stood still and making some normal machine noises. Although when i do the move axis, it moves like normal.

Any ideas of how to solve this problem?

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tim.m30
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Re: MK3S Kit Z Calibration Not Moving

Feb 18, 2019 11:41 pm

Make sure those black dust covers on the two Z screws are loose and well above the motors. If they are tight they can stall the motors.

Make sure there is a gap of a mm or so.

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robin.a
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Re: MK3S Kit Z Calibration Not Moving

Feb 19, 2019 1:50 am

steven.w24 wrote:
Feb 18, 2019 12:43 pm
Hi

I'm new to prusa so if i say something wrong, please let me know.
But today i just finish building the MK3S and when it started the Z calibration, what was meant to be a moving up till the top of the frame, stood still and making some normal machine noises. Although when i do the move axis, it moves like normal.

Any ideas of how to solve this problem?
My new mk3 did this when i finished it last week and set the xyz cal away. All i did was to manually screw the x axis up a few cm then tried again. It ran to the top and finished the calibration

steven.w24
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Re: MK3S Kit Z Calibration Not Moving

Feb 22, 2019 6:16 am

Well the Z Axis can move freely and it's just when i do the Z calibration that the z axis not moving

peter.m26
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Re: MK3S Kit Z Calibration Not Moving

Feb 23, 2019 5:10 pm

Try this,
move the z axis to almost the top,(in the menu)
the start de z calibration.
Or do this 2 times also helps.

adrian.w7
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Re: MK3S Kit Z Calibration Not Moving

Feb 24, 2019 7:30 pm

peter.m26 wrote:
Feb 23, 2019 5:10 pm
Try this,
move the z axis to almost the top,(in the menu)
the start de z calibration.
Or do this 2 times also helps.
Having a similar problem to @steven.w24 where I just completed the MK3Skit and during calibration the Z axis does not move but there is a buzzing noise. It fails calibration. Tried the this suggestion by @peter.m26 and noticed that only one of the two Z axis motors appears to be moving (right hand side only). I checked again the connections and confirmed the Z axis motors are connected to the proper locations on the ENSIY motherboard but the results are the same. I am reaching out to the support team as well at info@prusa3d.com about this. What other recommended troubleshooting steps are there?

Olef
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Re: MK3S Kit Z Calibration Not Moving

Feb 24, 2019 7:53 pm

Support are inundated at the moment due to the recent releases so an email reply will take some days. Go to https://shop.prusa3d.com/en/ and open the chat window bottom right. You will get assisted right away there.

adrian.w7
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Re: MK3S Kit Z Calibration Not Moving

Feb 24, 2019 8:01 pm

Olef wrote:
Feb 24, 2019 7:53 pm
Support are inundated at the moment due to the recent releases so an email reply will take some days. Go to https://shop.prusa3d.com/en/ and open the chat window bottom right. You will get assisted right away there.
@Olaf thank you for the reply. I started with a chat first and the person I chatted with told me to send an e-mail to info@prusa3d.com as they were unable to help me resolve the issue. They also indicated that they'd be able to reply very soon - sounds like the live chat team does not know e-mail support may take some days. :?

Update on troubleshooting this issue - I found that the left Z axis motor does indeed move. I removed the the trapezoidal nut from the X-end, went to settings and manually moved the Z axis, and the Z axis motor does operate! That is good, now trying to figure out why it does not move when assembled with the trapezoidal nut.

adrian.w7
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Re: MK3S Kit Z Calibration Not Moving

Feb 24, 2019 8:28 pm

Update again - Z axis seems to work properly up and down but the Wizard fails XYZ calibration quickly with the message, "Calibration failed! Check the axes and run again." and the paper is pinched during this process. Should note that this is using the current firmware is current at v.3.5.3 (the kit shipped with this version).

Olef
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Re: MK3S Kit Z Calibration Not Moving

Feb 24, 2019 8:59 pm

Interesting. I'm surprised support chat sent you off to email - they must be very busy.

Anyway you now have movement. Good. I suspect one of your trapezoid nuts was binding. Seems to occur quite frequently on new builds.

Question - have you set up your Pinda as per the instructions i.e. the thickness of a cable tie higher than the nozzle?

If so is the Pinda working correctly? You should see a red led on the top end around the cable when it is at rest, and when you bring a metallic object such as a screwdriver within a millimetre or so of the grey end the LED should turn off.

Finally, when you start the xyz calibration the x axis should move right to the top of the frame and actually collide with it. There should be a second or so of buzzing from the steppers as it does this. This is how the machine knows the x axis is at the top of its travel and equally importantly that it is level - from that it calculates the height where the bed should be.

Good luck :)

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