Author Topic: Error on engraving  (Read 9492 times)

Zax

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Re: Error on engraving
« Reply #30 on: May 10, 2017, 07:43:47 AM »
I don't see how, it's an open loop system so Grbl has no idea the steppers didn't move when instructed to do so.

The "error" you were getting is an actual code back from Grbl telling T2Laser there was a problem, which means it must have detected something wrong. I can only assume that's a USB data error or something failing with the microcontroller.

nottingham82

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Re: Error on engraving
« Reply #31 on: May 10, 2017, 10:18:06 PM »
was it grounding out causing a surge in the board when the broken wire was moving around?
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fvuichard

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Re: Error on engraving
« Reply #32 on: May 11, 2017, 02:01:35 AM »
I do not know, but the end of some wire look naked and the red one is broken

In any way I have to change it. So I will see if this eliminates the problem.
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Zax

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Re: Error on engraving
« Reply #33 on: May 11, 2017, 04:29:37 AM »
@nottingham82 That would likely cause it, good call, perhaps it does make sense.

wild.bill

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Re: Error on engraving
« Reply #34 on: May 11, 2017, 10:26:33 AM »
I think that bouncing broken motor wires will cause a surge that will cause GRBL to report an error.
Both times I have had broken motor wires I saw a string of errors which is what got me to go looking for a break.

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Stonemull

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Re: Error on engraving
« Reply #35 on: May 11, 2017, 12:47:44 PM »
The pololus carry a warning in that disconnecting a motor while it is in use can destroy the pololu driver, I think high voltage inductive spikes would be the likely culprit in that case blowing the mosfets.
(think car coil .. )
It is quite possibly putting out a lot of RF interference as it will be arcing at some point, very tiny probably invisible arcs, but they are probably enough to upset a USB in close proximity.
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fvuichard

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Re: Error on engraving
« Reply #36 on: May 23, 2017, 01:33:03 AM »
So, I just received my new cable, but that does not change anything. I managed to send an engraving of more than 18 hours but I had an error after one hour on the second try. :-[
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Zax

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Re: Error on engraving
« Reply #37 on: May 23, 2017, 04:14:24 AM »
Can you recap what you've tried?

USB cable, Nano, run the g-code in Check mode, run without motors and laser connected (just the board) etc.


fvuichard

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Re: Error on engraving
« Reply #38 on: May 23, 2017, 06:46:24 AM »
I have test without the laser connected but not without the motors.

I will test this before to change my Nano board.
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Zax

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Re: Error on engraving
« Reply #39 on: May 23, 2017, 09:31:31 AM »
You can also select Check Mode (Settings menu on the Laser Control screen), this just runs the Grbl interpreter and does not send any signals out of the Nano.

fvuichard

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Re: Error on engraving
« Reply #40 on: May 29, 2017, 07:48:55 AM »
I carried several test with the motors (or motors and laser) unplug, with the motor (or motor and laser) plugged but not powered. Also test  in check mode.

In check mode, I have no problem .. all process is ok.
But impossible to finish an engraving with the motor (or motor and laser) disconnect or not powered.

I have always this error. :'( :'( :'(
« Last Edit: May 29, 2017, 07:49:48 AM by fvuichard »
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Stonemull

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Re: Error on engraving
« Reply #41 on: May 29, 2017, 08:35:31 AM »
Havevyou trued another Nano ?
Perhaps it has a random reboot issue.

I think if check mode is fine then there is no issue with the gcode. I assume it is very fast to check though.

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Zax

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Re: Error on engraving
« Reply #42 on: May 29, 2017, 10:49:41 AM »
Check mode processes the g-code the same except no motor output. Sounds like it could be electrical noise causing an error in the Nano.

mrehmus

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Re: Error on engraving
« Reply #43 on: May 29, 2017, 12:44:42 PM »
I am starting to think that a UPS is a good idea with the lasers as well as with 3D printers. Especially if making long runs where power glitches or loss will mess up the work. Since most decent UPS units also do a fairly good job of filtering the power, it may make some sense.

Don't know if these products will work on a simulated sine wave power or if they need a pure sine wave.
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Zax

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Re: Error on engraving
« Reply #44 on: May 29, 2017, 01:13:00 PM »
Since power for the Nano comes from the USB it will be OK, and the motors / laser run from the DC power supply so even a cheap smoothed square wave would be fine.