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Printing in the air
Posted: Fri Feb 13, 2015 4:53 am
by McSlappy
So this has happened to me on 2 separate Rostocks this week. I press print and it drops to about halfway down the arms and begins printing in the air.
I've just plugged this machine into a USB hub, I don't suppose that could be the issue? MC seems to be printing on the Taz through the hub without issue...
Thoughts?
**EDIT**
Looks like even without the hub it's now still printing in the air...
The previous machine this happened to was plugged into the monitor's usb port so it was essentially a hub as well. I ended up reloading the firmware to get it to work again.
Do hubs mess with the firmware?
Re: Printing in the air
Posted: Fri Feb 13, 2015 8:08 am
by Jimustanguitar
You mean everybody can't print in the air like me?
[youtube]
http://www.youtube.com/watch?v=nppfLRESX0A[/youtube]
Re: Printing in the air
Posted: Fri Feb 13, 2015 8:53 am
by geneb
Sounds to me like either your Z zero point is screwy or your steps per mm in the firmware is wrong.
g.
Re: Printing in the air
Posted: Fri Feb 13, 2015 4:37 pm
by McSlappy
Yes it's true that the z=0 position was set to 240mm for some reason. Still confused how this could happen just by using a usb hub.
I re-zeroed it and it's working fine. I'll test the hub again later...
Re: Printing in the air
Posted: Fri Feb 13, 2015 5:31 pm
by Tonkabot
McSlappy wrote:So this has happened to me on 2 separate Rostocks this week. I press print and it drops to about halfway down the arms and begins printing in the air.
I've just plugged this machine into a USB hub, I don't suppose that could be the issue? MC seems to be printing on the Taz through the hub without issue...
Thoughts?
**EDIT**
Looks like even without the hub it's now still printing in the air...
The previous machine this happened to was plugged into the monitor's usb port so it was essentially a hub as well. I ended up reloading the firmware to get it to work again.
Do hubs mess with the firmware?
I have had this happen 3 times now, and I believe it is a bug in mattercontrol.
It seems to happen whenever I get excited and try changing the temps a lot on the manual control screen (to preheat for a print). Then my USB comm locks up and I have to reboot the Rambo. after that, My Z-height has been changed to that nice round number of 240.00mm or whatever (maybe the starting point for an Orion? - I have a Max)
As long as I don't impatiently send lots of stuff down the usb port - like hitting 60c for bed temp, changing my mind and hitting 85c, then hitting 85c again when nothing happens...
At least I think it has to do with glomming up the USB link. I don't know for certain.
Re: Printing in the air
Posted: Fri Feb 13, 2015 9:56 pm
by forrie
Has happened to me in the past as well....
No idea what caused it though...I don't use a usb hub.
Re: Printing in the air
Posted: Sun Feb 15, 2015 3:48 pm
by geneb
Are you folks using the current 1.2.2 version of MatterControl?
g.
Re: Printing in the air
Posted: Sun Feb 15, 2015 5:38 pm
by McSlappy
Yes... And come to think of it, it's only happened on the 1.2.2 version...
And Tonka - I think this is what I was doing. Extruding lots of 10mm lengths of filament. Probably bombing the queue with commands....
Re: Printing in the air
Posted: Mon Feb 16, 2015 12:27 am
by Tonkabot
geneb wrote:Are you folks using the current 1.2.2 version of MatterControl?
g.
I have had it happen on 1.2, and also 1.2.1. I am more patient now and don't press a lot of buttons that send USB stuff rapidly anymore - I have not yet seen it happen in 1.2.2
Oh, and I don't have a USB hub involved - straight connection from the printer to my laptop.
Re: Printing in the air
Posted: Mon Feb 16, 2015 4:06 am
by McSlappy
Yeah I'll be patient for a bit until I figure out what happened :/
Re: Printing in the air
Posted: Mon Feb 23, 2015 1:40 pm
by WildWill
Happened to me after an unrelated computer crash. MatterControl 1.2.2
Just a minor nuisance. Much better than crashing into the bed.
Re: Printing in the air
Posted: Mon Feb 23, 2015 2:02 pm
by Tincho85
The title reminded me of this cool project:
WirePrint. It prints 3D models as wireframe previews. By extruding filament directly into 3D space instead of printing layer-wise.
[youtube]
http://www.youtube.com/watch?v=Ea4V7kb2VsY[/youtube]
Re: Printing in the air
Posted: Mon Feb 23, 2015 5:00 pm
by RocketMagnet
I was getting this also, I just assumed for some reason it was using the Build Height value and not the Z height from the Eeprom.
RH always uses the Eeprom value as far as I can tell.
Re: Printing in the air
Posted: Mon Feb 23, 2015 5:26 pm
by KAS
Happens to me as-well with MC when the connection was set to auto. It would stop the print from the SD card and occasionally change the z height.
Re: Printing in the air
Posted: Tue Aug 18, 2015 3:44 pm
by dajay23D
this also happens to me. Only at times, it not only prints in air, the hot end will ram/plunge itself to one of the axis tubes before it prints in midair. I had to emergency stop on a few occasions. I disconnect, reload gcode and i'ts fine again.