Gantry Leveling Fail and Prints partially sticking to the BED

[Inderpreet SIngh @ipv1 My Robox is a Blue Commercial Version]

I won a Cel Robox at element 14 in the IoT Holiday Lights Challenge and got the unit a month back. My first print was at draft settings and was a Phone stand and worked pretty well.

From there on, things went to hell. I made some stuff and tried printing them and found a problem. The Gantry was no longer level and the auto-levelling did not work. The parts of my print that were near the right side of the bed were thin to non-existence and the parts on the left did not touch the surface.

I tried Gantry Level but did not work. I tried nozzle calibration with all the info on how paper should just move and have just enough space for the PLA blah blah. No Go!

I checked the bed and its as flat as they get. No warping of any kind.

Next I tried to fool the gantry leveling thingy and put the warranty and getting started guide under the nozzle on the right side and things got a bit better. However I still cannot use the entire bed.

Anyone have any Ideas as to what is going on and how it can be rectified?

https://lh4.googleusercontent.com/-xPILHh-MXU8/VQ2brZWRYtI/AAAAAAAALBg/ONTpWQ72Id8/w1185-h889-no/20150319_111901.jpg

[click @click My Robox is a Green Kickstarter Limited Edition]

Sorry for not being of much more help than this (I didn’t experience problem you’re talking about) - but at least there are things you can go through:

https://robox.freshdesk.com/support/home - there are some articles there. If everything else fails - log a support ticket

http://roboxing.com/ - extra source of information regarding Robox

Also, I am sure that there are still some people here who had similar problem and levelling of gantry had been mentioned before…

 

 

 

[Aimdy @mistsoul My Robox is a Blue Commercial Version]

@ipv1 are you sure that the issue is with your gantry? the photo you provided did not show the gantry being out of place so I was curious, however it clearly shows that you have good adhesion on one side and not on another side, which smells like either the PEI bed is not evenly flat or perfectly clipped to the heat bed, or your height calibration needs to be redone. First check how flat your PEI bed is when taken out of robox. You can try to flex it in a smile and reinsert it our you can flip it around to see if that helps. Also you are printing with ABS, which is more sensitive to the ambient temperature within the robox, double check to make sure that you are printing when the ambient is around 45 degree c.

Moh

[BHudson @bhudson I have several Robox units Kickstarter and Commercial]

@ipv1

Please check that the gantry structure has not been damaged in transit. I have seen this occur on another machine. To test this, push the gantry bars up on either side, close to the wall of the print area. They should move up not more than about 3/16 of an inch. More movement than that means you have a problem with the gantry structure that will have to be fixed. This can be the cause of the gantry level not working.

Also, when you say that it “did not work” and it was “No go”, please explain exactly what happened. Did you get an error that it could not complete? Why did you get that error? Did it complete but the gantry was still not level? Please describe in detail exactly what happened and what went wrong.

I operate two Betas and one Production Robox.

[poju @poju My Robox is a Blue Commercial Version]

Seems like your whole bed is tilted a bit like mine. Right side little higher than left. Ive only been printing rather little footprint parts so it dont matter if i print somewhat middle or little to the right. If i print too much to right nozzle scrapes pei if too much left nothing will stuck. I have checked there is no rubish under bed.

I made 140*190*0.2 plane that i can check how is my bed Printing it now.

I attach it here so you can also diagnose your bed

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[Inderpreet SIngh @ipv1 My Robox is a Blue Commercial Version]

Hi all & thanks for the inputs,

Aimdy

The bed seems flat and so does the PEI. I am using pla.

BHudson

I tried to push and its fairly fixed. More on the left and less on the right but I think within parameters. I am not getting any errors in software but the print just does not stick!

Poju,

I tried printing a 1mm thick rectangle the size of the area and the result is attached.

Thanks again all

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[poju @poju My Robox is a Blue Commercial Version]

Seems that you can lower ur nozzle a bit. Advansed setting head Z 0,05 step lower at time.

Heres pic of my plane print, i cleaned it and flipped it and im printing to other side, pic of it follows soon

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[poju @poju My Robox is a Blue Commercial Version]

This i got after cleaning and flipping bed

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[poju @poju My Robox is a Blue Commercial Version]

Thats weird coz i usually print on middle and first layer is fine (so i assume that prints optimal first layer hight is calculated and it wont work with multiple objects)

Second thing is that my bed must be warped coz flipping pei didnt affect that thin area. Should i make ticket @pete ?

• This reply was modified 9 months, 1 week ago by  poju.

[click @click My Robox is a Green Kickstarter Limited Edition]

@poju try to let bed heat up and before it start printing push hot bed in (use kitchen towel folded a few times - so you don’t burn your fingers). It helped me a few times when I had similar issue as you - when almost like a ‘bubbles’ appeared on PEI and pushing it in helped.

@ipv1 - sorry - your doesn’t look like such problem

[Aimdy @mistsoul My Robox is a Blue Commercial Version]

@ipv1 it seems to me that this is a bed and calibration issue as opposed to a gantry leveling issue.

For the bed: Several members on this forum have bed adhesion issues in some areas of the pei due to warpage, the thing is it is hard to see with the naked eye or without tools when the pei is attached to the bed. It could also be the actual heat bed that is slightly out of level. When you place your pei on a flat surface like a table, does it concave up or down at all?

Also when the PEI is installed, try pressing down slightly with one finger at each corners and observe whether the pei is driven down or not, if it is then at the area that moves down and its vicinity there is space between the PEI and the bed which would hinder the heat distribution of the bed when you are trying to print.

You could try flipping the PEI as @Poju showed above, so that you are printing on the side that was facing the heat bed and see if that helps. The advice from Cel was actually to insert the bed in a smile, but for me it did not work, bizarrely enough the opposite, a frown produced much better results.

For the calibration: I know you went through this several times, but could you go through it once more after reading the info on the roboxing website if you have not done so already? see links below, once you go through onces more you can tweak the z value in increment of .05 as suggested above to see if that helps:

Calibrate Nozzle Opening - http://roboxing.com/calibrate_nozzle_opening

Calibrate Nozzle Height- http://roboxing.com/calibrate_nozzle_height

First-Print Nozzle Height Calibration - http://roboxing.com/getting_started

Moh

[Pete @pete My Robox is a Blue Commercial Version]

@poju yes create a ticket, you might have a bed which has a lump on the bottom. In your photo I can see there are some scuff marks on the stainless frame behind the bed. Are these marks also in front of the bed?

If there is a lump on the bottom you will see the bed bump up as it passes over the edges of the hole in the middle of the stainless frame.

@ipv1 I can see you have lots of great suggestions from the forum guys. As Bhudson said, check for damage to the X gantry (2 horizontal rails) . it should push up a few mm but it should not be able to push down at all.
Apart from that, cleaning the bed, calibration and checking for “bounce” in the print surface are the best things to do.

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