Z AXIS FAILURE

This topic contains 12 replies, has 6 voices, and was last updated by  Ralf 7 hours, 9 minutes ago.

Viewing 13 posts - 1 through 13 (of 13 total)
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  • #96997

    joe
    Participant

    Ryan — I have been cutting text and images in wood [ “signs” ] successfully with the MPCNC  until recently.Now , when I make a cut – the tool works fine for a short time – then the Z Axis begins to rise above the work pc making a “shadow” cut . I can not find any settings that I have changed accidentally . When I talked to Ryan at REPRAP 2018 , We determined that the Ramps board was included in my kit.  H e said if it works , use it [it’s been fine till now]. But, I am wondering if it is time for a change.  I have no hesitation abt buying a new board. I have been using Inkscape , Estlcam 7 Repetier .  THANKS  for any advice you can offer.

    Thanks Again , Joe

     

     

     

     

     

     

     

     

     

    #97007

    Aaryn
    Participant

    I know this is not likely the case.  Have you checked the gcode to see if the z changes are in there?

    #97034

    Ryan
    Keymaster

    That is a crazy error. Maybe try powering off, swap the Z driver with one of the other axis and see it that is still the case?

    #97058

    joe
    Participant

    Ryan , I switched the Z and Y axis — the Y just muttered abt — the Z started to slowly rise above the work piece

    #97059

    Ryan
    Keymaster

    That is really a new one to me. You are sure it is not your Gcode? Does it rise with my Crown code?

    #97076

    Guffy
    Participant

    1. Check z coordinate on your lcd. Does it change when that issue happens? In other words does the issue could be inspired by firmware.

    2. Do you use z probe? If so can you say that it works stable and hasn’t sometime triggering by EMI? Does endstops enabled for all the time or for homing time only?

     

    #97137

    Ralf
    Participant

    Hello Everyone, i encountered the same behaviour yesterday on my machine.

    motors in serial, tb6600, arduino nano with estcam firmware, estlcam.

    the problem occures not only in actual programs, when i drive my z up and down 10mm after a few cycles a deviation is occuring. an ~ 3 minute engraving results in z shifted nearly 2mm upwards. i changed the driver, the arduino, the motor, even the motor cable, nothing changed. i think ill try grbl on the nano today and use ugs to check if its estlcams fault.

    greetings from germany, ralf

     

     

    Edit video of the behavior

    • This reply was modified 5 days, 18 hours ago by  Ralf.
    • This reply was modified 5 days, 14 hours ago by  Ralf.
    #97513

    joe
    Participant

    RYAN – I am using gcode that I have used successfully in the past [ the crown included ] .  Recently, it starts out cutting just fine at the beginning , but as it continues – it rises above the work piece to complete  the image ! ??????

    Thanks for your time == Joe

     

    Attachments:
    #97518

    Ryan
    Keymaster

    Any information to go with that? Long LCD cables, or bundled with the stepper wires?

    I really have no idea this is the only place this has come up. Check for loose wires, static, swap cables, usb, SD cards. I can only guess. What have you tried, changed, anything.

    #97530

    Bill
    Participant

    Loose coupler causing slipage when going down (pushing into workpiece) and success when going up?

    #97700

    joe
    Participant

    First of all – THANKS to Ryan, Aeryn ,Guffy ,Ralf, Bill & everyone who tried to help. Now let me fess up to a DUMB action that appears to be the cause. Some time ago I experimented with a “Z” touch plate – I decided it wasn’t for me , so I rolled it up & put in in the far corner of my table -still attached to the circuit board [And FORGOT IT ] – Eventually it fell to the concrete floor – The wires never touching but they lay on the concrete. Maybe there was enough ‘bleed” thru the ground to cause a problem in the board ??? Way over my pay grade ! I removed the connector from the board and everything now works fine !

    Thanks again – ” Dummy” Joe

    #97707

    Ryan
    Keymaster

    No worries, we all make simple mistakes (all the time), it makes total sense now. I will remember that.

    #97708

    Ralf
    Participant

    Hey joe, glad you figured it out!

    also news from my end, it seems like my tb6600 drivers dont handle the microstepping well. i set my driver to 800 steps/rev and it works like a charm!

    greetings

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