Troubleshooting a very strange Z-axis problem

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Polaris
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Joined: Wed Jun 29, 2011 2:48 pm

Troubleshooting a very strange Z-axis problem

Post by Polaris » Tue Sep 25, 2012 2:35 pm

Thought i'd post here before going to pp3dp support in case someone has already got the solution to this

Problem
---------
Z Axis is not functioning during printing
- raising to print head
- or under 3DPrint Menu>Maintenance "To:"[ 100 ] to move it up 100 mm say.


Current Status
-----------------
V1.16 = ROM 6.1 = Firmware 2.00 UP!2011 (4 mezzanine controller boards for steppers)
Initializes : check however need to do ** below first
Centers table : check X, Y axes fine
Move to/Zaxis : problem !!
Had just printed out a 4 hour job earlier that day without problem


Tried the following actions
---------------------------
Turned off UP! for 0.5hour to cool completely, restarted with same issue.
Software app closed and re-opened with UP! off/on <same issue all cases>

Swapped boards : swapped X and Z motor/switch cables - X now exhibits problem, Z axis normal operation

Test Motor :check (see above)

**positioning Z-axis then turning on UP : stepper motor holds position - but can't move it as initialization has to take place first. It then moves down to contact the limit switch and bounces back to home position (a few mm in the upward direction until limit switch in Normally Off position).

Not tried yet
-------------
reinstall of software, rom update/repatch

Testing Conclusion
------------------
Z Motor function ok (both directions),Z limit switch function ok

possible causes ( that I can think of )
------------------
: software corrupted
: main board/rom failed - not supplying controller board with appropriate signal.

Any one else experiencing this scenario ?
(my machine is out of warranty by a few months now... so not looking forward to a new main board if that's what's needed )

Regards Matt
|=Polaris D+sign =||= designing the bleeding obvious since 2005 =|

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wilsonj
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Location: Australia

Re: Troubleshooting a very strange Z-axis problem

Post by wilsonj » Tue Sep 25, 2012 8:47 pm

Hi Matt, when you powered off did you disconnect the power from the wall, or just turn off the switch at the back. When I had problems I found I needed to completely drain the motherboard of power completely to make it "reset".
Regards
Jamie
3DPrinterGear.com.au

Polaris
Posts: 19
Joined: Wed Jun 29, 2011 2:48 pm

Re: Troubleshooting a very strange Z-axis problem

Post by Polaris » Wed Sep 26, 2012 4:12 am

Hey Wilson

yup, my UP is the slightly older version ( no power switch ) so mains switch was off for 1/2 hour ( and have tried with being off overnight too )
& unplugged the unit too, in case there was any residual current from the power pack.
It's been in operation without fault for 5 months light use.

thanks for the input

Matt
|=Polaris D+sign =||= designing the bleeding obvious since 2005 =|

Polaris
Posts: 19
Joined: Wed Jun 29, 2011 2:48 pm

Re: Troubleshooting a very strange Z-axis problem

Post by Polaris » Wed Sep 26, 2012 5:08 am

Hey Wilson... Fixed it

The Z axis mezzanine controller boards was not seated down all the way - I'm guessing it worked it's way out just enough to stop working from the natural vibration when printing.

regards Matt
|=Polaris D+sign =||= designing the bleeding obvious since 2005 =|

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wilsonj
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Location: Australia

Re: Troubleshooting a very strange Z-axis problem

Post by wilsonj » Wed Sep 26, 2012 10:12 am

Hi Matt, glad you found the problem and got it sorted.
Regards
Jamie
3DPrinterGear.com.au

Polaris
Posts: 19
Joined: Wed Jun 29, 2011 2:48 pm

Re: Troubleshooting a very strange Z-axis problem

Post by Polaris » Wed Sep 26, 2012 1:55 pm

False positive / typed to soon
(one of those moments, sent the email off with a happy grin... 2 minutes later it was back to the grimace of discontent.)

It started off on a print and didn't get through printing the raft.

have been trouble shooting last 8 hours ... can only draw the conclusion
it is a failed main board/CPU.... if reset won't work mentioned below.
All the controller boards work - I have tested each one.

Anyone know : is this a reset microswitch ?
CPU_Board_90x90.jpg
CPU Board - reset button ?
CPU_Board_90x90.jpg (36.49 KiB) Viewed 6528 times
I pressed for 10 secs while On, then Off and also totally disconnected from power... no joy tho.
|=Polaris D+sign =||= designing the bleeding obvious since 2005 =|

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wackojacko
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Re: Troubleshooting a very strange Z-axis problem

Post by wackojacko » Wed Sep 26, 2012 8:45 pm

Try swapping the stepper boards then see if the same axis is at fault. You can purchase warranty extension within 24 months of invoice date!

www.3DPrintingSystems.com
Bruce
http://www.3DPrintingSystems.com

Need help with your printer, check out our Youtube channel.
https://www.youtube.com/user/3dprinting ... /playlists

Polaris
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Joined: Wed Jun 29, 2011 2:48 pm

Re: Troubleshooting a very strange Z-axis problem

Post by Polaris » Thu Sep 27, 2012 12:42 am

Thanks wj
that's really good to know !

I have tested each stepper board, they are functioning perfectly...

I had also tried to flash the rom back to earlier versions... [no change]
and back to the current rom v6.03
also tried re-installing the software

Regards Matt
|=Polaris D+sign =||= designing the bleeding obvious since 2005 =|

alton
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Joined: Thu Oct 11, 2012 7:49 am

Re: Troubleshooting a very strange Z-axis problem

Post by alton » Thu Oct 11, 2012 7:53 am

Nice post. I like it. Thanks for sharing these information. Keep it up. :lol: :P
FASL:

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