Stuck at the top of the Z Axis  

Re: Stuck at the top of the Z Axis

Not sure I understood your problem but when I got that error message, in my case it was because the PINDA was not "1 zip tie" away from the nozzle height. After I positioned the PINDA closer to the bed that error message went away.

Re: Stuck at the top of the Z Axis

Hi Karl,

if you use the endstop test option on the LCD. does the Z endstop change when you put metal near the Pinda probe.?

it's possible that the signal wire might be faulty between the pinda and the einsy board.
there are 4 wires in the Pinda cable, any one of these could break, in my case, it was one of the power wires,

regards Joan

Re: Stuck at the top of the Z Axis

Joan, I dont know the "Zend stop" can not find it in the menu, maybe it is a different name.

Posted a video as to what the machine is doing, fails any test except for self test.

Re: Stuck at the top of the Z Axis

Hi Karl,

in the Calibration menu, third item from bottom
Show End Stops

Shows status of X, Y, and Z endstops...

as this is a Mk3 with motor stall detection for X and Y, they will never change.
but Z should toggle between 0 and 1 when the pinda is in Mid Air and you present a piece of metal to the end of it!

if the LED goes out, but the 0 doesn't change to a 1 or is always one even with the LED on, then your signal is not getting through

regards Joan

Re: Stuck at the top of the Z Axis

in the Calibration menu, third item from bottom
Show End Stops

Shows status of X, Y, and Z endstops...

regards Joan

New MK3 firmware as of 3.2.1 does not have this option anymore. Explained on github (basically useless menu now that there are no physical endstops)

If the Z axis won't go down, at all, that usually means it cannot detect the Pinda, a safety feature baked into the firmware.

Try it this way; reset the printer, move both z axis down per hand, a few cm should suffice.
Rotate the knob on the display, and go up. Up always goes, even when there is no pinda connected.
Once completely up, then rote into the other direction.
-> Z axis goes down? you got a calibration/firmware problem.
-> Z axis won't go down? Pinda/Pinda cable/ connection on the motherboard not good try replugging.

Re: Stuck at the top of the Z Axis

Hi Devil hunter

maybe I have a faulty firmware

still works on mine!

regards, Joan

Re: Stuck at the top of the Z Axis

I can move the z axis up and down to the point where the printer was turned on, will not move past that point. This can be done with the PINDA plugged in or pulled out on the RAMBO board. No Change

I did find the End Point menu item and everything is a "1".

Karl

Re: Stuck at the top of the Z Axis

Hi Devil hunter

maybe I have a faulty firmware

still works on mine!

regards, Joan

dafuq.

This should have went away with one of the last commits in 3.2.1, i remember reading the commit.

Perhaps this is an old eeprom setting, i did a factory wipe (hold button during startup and select all data) after the 3.2.1 update, because so much got changed.

I don't have the menu for Endstops anymore, on any of my MK3's

Thanks for the heads up!

Re: Stuck at the top of the Z Axis

Hi devil hunter,

I usually do a factory reset before new firmware so the eprom should have been clean...

never a dull moment in this forum...

I will keep an eye out for this changing, is your firmware version from git hub, or prusa drivers and firmware page?

is it a different build to -576?

regards Joan

Re: Stuck at the top of the Z Axis

3.2.1 576

Downloaded from the Prusa site

Re: Stuck at the top of the Z Axis

Hi devil hunter,

I usually do a factory reset before new firmware so the eprom should have been clean...

never a dull moment in this forum...

I will keep an eye out for this changing, is your firmware version from git hub, or prusa drivers and firmware page?

is it a different build to -576?

regards Joan

Pulled mine for changes from github on 23.05.18 (still called 576)

Original on prusa drivers page was made on 18.05.18 (first 576)

can't find the commit now. do you know in which file the menu entries are?

edit: it's in ultralcd.cpp
gonna keep looking...

@karl

This should be something for the Prusa chat on the shop page.

I could suggest doing the factory reset if everything fails. (push X, then push and hold the rotating knob), then select 'all data' , but if my hunch is right, this will get rid of the endstop menu...

Re: Stuck at the top of the Z Axis

A factory reset is hold the rotating knob and power on

Re: Stuck at the top of the Z Axis

https://help.prusa3d.com/l/en/article/SYvbQ66IXF-factory-reset

@ joan

I give up, i can't find the commit anymore.
I retract what i said, if i can't back it up.
(I'm still missing the menu on both printers since updating to 3.2.1)

Re: Stuck at the top of the Z Axis

I did a Factory Reset and the printer calibration fails at the same point when requested to place a paper on the print bed a continue.

Pressing the rotating button after power on when the Prusa name appears also triggers the Factory Reset menu.

Point of interest, I still have the "Show End Stops" in the "Calibration" menu.

Guess I need a PINDA for my month old printer for which there are none to buy.

Karl

Re: Stuck at the top of the Z Axis

Hi Karl,
If your Pinda is faulty, have a chat with Support

the spares are visible on the eShop site, if you log in, and assuming prusa have tagged your account to say you have bought a printer...

if you log in, and you cannot see the pinda in printer spares... chat, should be able to sort you out!
regards Joan

Re: Stuck at the top of the Z Axis

I did contact Prusa chat, they are sending a replacement PINDA. We'll see if it works when it arrives.

Re: Stuck at the top of the Z Axis

Best wishes Karl,

regards Joan

Re: Stuck at the top of the Z Axis

Hi,

seems I have the absolut same problem like you. My printer MK3 with the newest firmware does the same like in your video! In fact, I could use your video to show the support what my problem is. So sad.

I have a print time of 30 days with this printer, never any problem. This morning a 15h print was finished, so i did put it of the print bed, and prepared it for the next print, did load the next file from the SD card, and started the print. The printer did, like yours, autohome X/Y, and then did run up in Z until the endstop, and did make the same noise like yours.

Important: My 15h did finish great, there was no sign of a error on this print, "only" the next one did not start.

So I did restart the printer, and did retry it. Same problem. Then I did a factory reset and did try the wizzard. As your printer, all checks are running fine, until the step where you have to put the paper on the bed.

Then I did load the firmware again and did install it on the printer, and then also did a factory resett and did try the wizzard. Same problem.

So, I did not check it while my printer was working: Should there be a light flashing if I go with a steel part near the PINDA probe?

I´m a bit confused that you have the exact same problem right now.

Re: Stuck at the top of the Z Axis

Hi Ramon

if the extruder is at the top, the Pinda probe LED should be lit,

if you place metal at the bottom of the print head, the LED should go dark,

if you can see the show endstops, item in the calibration menu,
the Z value should read 0 when the pinda is not near metal and
the Z value should read 1 when the pinda is near metal

if the led is off and Z = 0 at the same time, then something is wrong with your pinda
if the led is on and Z = 1 at the same time, then something is wrong with your pinda

regards Joan