April 14, 2019 at 3:57 pm #96997
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 , JoeApril 14, 2019 at 9:57 pm #97007
I know this is not likely the case. Have you checked the gcode to see if the z changes are in there?April 15, 2019 at 9:06 am #97034
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?April 15, 2019 at 12:09 pm #97058
Ryan , I switched the Z and Y axis — the Y just muttered abt — the Z started to slowly rise above the work pieceApril 15, 2019 at 12:14 pm #97059
That is really a new one to me. You are sure it is not your Gcode? Does it rise with my Crown code?April 15, 2019 at 2:14 pm #97076
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?April 15, 2019 at 11:00 pm #97137
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 behaviorApril 18, 2019 at 11:19 am #97513
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:April 18, 2019 at 11:55 am #97518
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.April 18, 2019 at 3:53 pm #97530
Loose coupler causing slipage when going down (pushing into workpiece) and success when going up?April 21, 2019 at 9:11 am #97700
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” JoeApril 21, 2019 at 9:48 am #97707
No worries, we all make simple mistakes (all the time), it makes total sense now. I will remember that.
1 user thanked author for this post.April 21, 2019 at 9:54 am #97708
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!
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