Or just a “Jump to” option and select near the % of failure. Since the Nomad has a log anyway, would there be a way to tap that in a “Recover Last Job” manner or something of the sort?
It’s not hard to keep track of the last line sent. The difficulty is was the line executed or not.
In the general case, the line might be compound (G code allow multiple commands on a line), or might be defining a zero (G 54… G59). Any uncertainty could lead to a crash or serious problem.
While I agree there should be a way to take off again from a good point, doing so after a hang or crash isn’t that safe a things to do automatically.
The number of reports of hangs - particularly on the Mac - is becoming alarming. We should find the root cause and fix that!
Anyone having Mac hangs, please get a ground/neutral tester (if you don’t already have one) and check all your outlets. Any problems can potentially be fatal and can easily cause untold problems.
Power is often the source of many problems. I documented things to try here:
mark
I have a dedicated Socket for my machines and a massive UPS making sure the power stays steady. 24k gold USB to Nomad and both Lulzbots.
The hangs I’m getting are odd; sometimes the spindle just stops @ XYZ and keeps spinning, other times it just stops. In all instances CM stays responsive. I’m near 100% it isn’t a power or interference issue.
-Hank
I have a dedicated Socket for my machines and a massive UPS making sure the power stays steady. 24k gold USB to Nomad and both Lulzbots.
You run things like I do. Your UPS would be complaining about ground/neutral so I’m reasonable sure you’re OK on that front.
The hangs I’m getting are odd; sometimes the spindle just stops @ XYZ and keeps spinning, other times it just stops. In all instances CM stays responsive. I’m near 100% it isn’t a power or interference issue.
I’m writing for the general case. You data tends to point to something funky with the Nomad itself. I would ask for a support ticket and see what C3D can do. Off the cuff, it sounds like it might be noise problems due to bad connectors or solders, or a wire harness problem. YMMV.
mark
Oh we’re deep in troubleshooting already. Haha. I’m on the improvise until it’s resolved train. 
-Hank
I had connection issues but it was a simple fix for me.
I used a 1000uf 50v cap on pad c49 and everything is hunkydory now,no drops or stalls.
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I had connection issues but it was a simple fix for me.
I used a 1000uf 50v cap on pad c49 and everything is hunkydory now,no drops or stalls.
This is important information! How long has it been in place? No problems since?
Could you please describe your setup - Mac or Windows, What version of the OS?
Do you have an pictures of the board edit?
mark
Win 7,been in place for around 3 weeks. Run 14 jobs now with no issues.
That and grounding the spindle clamp has eliminated all my issues.
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Thanks for posting this information! C3D can jump on this - maybe talk with you - and see if the data is relevant to the hangs and stales others are reporting.
Why did you add the cap? Did you have 'scope or other data? Where did you run the ground from the spindle clamp to?
Grounding the spindle clamp. Interesting… I wonder if the spindle is generating or picking up charge from the cutting. Sufficient charge and weird things could start happening to signals.
Did you try one of the changes first or do both at the same time? If the former, did things improve?
mark
I definitely have to agree with the Home button. That would make things so much easier. Also a feature that would allow you to run the same job again in case something happened and you needed to make another pass.
The fix was discovered by aspurgeon on the SO3 forum in this thread. http://www.shapeoko.com/forum/viewtopic.php?f=4&t=6545
The spindle clamp is wired to the GND pin of a household plug.
And +1 to the home button,bCNC caters well in this regard…
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Just ordered some capacitors. Thank you for sharing this info!
50v Capacitor Gotta love Prime.
-Hank
Im not telling you how to suck eggs but make sure the polarity of the cap matches the polarity shown on the board. Its…interesting if you dont.
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Capacitors arrived today: can you post a clean shot of that install please?
Instant difference in overall *operating volume of the machine. Homing, measuring, cutting. All smoother and noticeably quieter.
I’ll post pics after I test an .nc file that failed every time @ 8% …I’m already at 11%.
If a mod or Admin can break this thread into 2 threads that would rock…I don’t want to hijack the Features with this fix, but it seems to be working incredibly well.
-Hank
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Good stuff and yes,its that pad.
The electrical noise is noticeably quieter as you have discovered.
That fix was for the 2.3 and 2.3 boards,anyone with something else needs to be wary of where they put it.
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Last question; where did you link in to ground your machine? @B_NEGATIVE
and: running through a UPS, should I ground to that source or wall outlet? #edit
I grounded the spindle clamp to the Z then the X/Y/Z to a single point then off to a GND pin on a domestic 3 pin plug with the live and neutral pins pulled out. All on the same power strip with the machine,PC,Spindle and Vac.
Still running like a champ,finished a 5 hour job with Alu yesterday…shame I had to scrap it as I got the tool offset wrong and drove the chamfer tool 1mm deeper than I wanted. 3 stage,2 tool changes and not a blip.
I am getting to the stage where its case closed on the glitches,just fitting a shielded enclosure to keep the swarf out and she is done,I even leave the machine unattended for short periods now,unthinkable before.
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