drayson
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Posts posted by drayson
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@ Sander,
I absolutely understand why it is important that the parts have a press fit. I will investigate further and keep you informed latest next week - thank you for offering your support.
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Hi Sander,
regarding print head alignment - this was the initiatior for my investigation.
During alignment I recognized that I had to push the right front edge of the print head upwards. For this I used additional washers between spring and the z-table to get it aligned with the head - result is a twisted bed...
With this setup I worked a few weeks but not satisfacting as I started thinking of an heated bed.
First I thought that it is an ussue of the z-table so I thought of an 3 point leveling. This was the reason I tried to level with the glass plate and then put it also onto the axes ==> issue recognized...
As gr5 and you suggested, today I asked my neighbor to assist, unfortunately without success - we tried two approaches:
- untightened the screws, put pressure on it (he´s a 95kg guy) and bolted it. It bends back as soon as the "heavy guy" steps back
- untightened the screws, used two clamps to screw down UM onto the glas table, tighten, release the clamps - same result...
Within the next days I hopefully find time to disassamble at least the side pannels and try to align the back and front with top and bottom to try to find the root.
Hoestly I don´t think that it´s just the right side pannel. I fear that the noses/holes in the pannels might be the root cause for this kind of twisting the whole body as they are very tight and without any space for "adjusting".
Have you ever had such behavior in your "production"?
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Yes, that´s true... electical engineering is not my favorite... :-)
As you said, cutting the cables is not the issue, put some small connectors on for the small leads should be feasible also for me :-)
But I have concerns about the heater cable as it is specially covered. Also I have concerns that the connector might get too hot as I assume that the heater needs a few amperes...
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@ gr5, thank you, good idea, I will try this on weekend.
another suggeston from a friend of mine is to take away the side pannels and align the front and back using a big "right angle". He mentioned that maybe the noses initiate tension because they sitting very tight...
So if your suggestion will not work I will try this next...
Nevertheless, it would be great if somebody from the ultimaker team could also give me a hint as they built them regularly...
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Hi Sander,
just as additional/summarized information - I think, I mixed up left and right in my initial description so here briefly again:
- glass plate sits flat on left axis
- glass plate sits flat on right axis near front pulley
- glass plate has gap on right axis near back pulley of app. 0,7mm/0,2°
- right front foot shows a gap to my glass table, remaining 3 feet touch table
- all corners show no gaps, front/side/top/bottom plates are well screwed to each other
- print bed vs. nozzle shows a wider distance on the front right edge when on all ther edges of the print bed are well aligned with the nozzle
I hope that this additional summary helps a bit to understand my issue.
b.r.
christian aka drayson
- glass plate sits flat on left axis
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Hi Sander,
here are the pictures - one from the right axis near the rear pulley, glass plate is flat on left axis and near the right front pulley, but has a gap of app. 0,7mm is the back.
I put the whole UM onto my glass table and it seems that the whole body is twisted as the right front leg is also "up in the air".
Any suggestions?
b.r.
christian
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Hi all,
recently I put a glass plate onto the left and right axis (don´t ask why...) and I recognized that the front right bearing sit's a bit lower than the other ones (glass plate not touching the axis).
I found out that my l left axis has a vertical missalignment of app. 0.2° (measured with digital pitch gauge).
This leads to problems at print bed horizontal alignment. (3 leveling points the same hight, the right front one app. 0,7mm lower..) and stress in the movement of the print head.
Has anybody else recognizes something like this?
Has anybody an advice how to fix it?
I honestly thought about disassambling the axis and rework/sand the bearing seat in the front plate but then the bearing would not sit as fixed as it should...
Your assist/advice is appreciated...
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@ amano,
Ich wollte mir auch so eine Variante wie in deinem Bild bauen, aber mit 2 kleinen 25mm Lüftern. Wie zufrieden bist du mit deiner Version?
lg aus Graz
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Hello everybody!
Honestly, I´m late with my post.
Got my Ultimaker nearly three month ago, building went straight, was a good decision to buy the kit.
Now I´m playing arround and try to modify it to get some small issues fixed :-)
So finally, there´s a new Ultimaker in Austria, exactly, GRAZ
Would be nice to get in touch with other owners especially from that region for networking.
by
chris aka drayson
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Hi all!
I often take my ultimaker with me. Unfortunately the feeder part is not really comfortable in terms of a simple box :-)
Therefor I´m thinking of applying some connectors on the back plate to seperate the cables between the PCB and the print head (fan, heater, sensor) below the feeder so that I can uncoupple the whole bowden/cable/feeder part and place it safely inside the ultimaker while transportation.
I´m not an electician so I would like to ask the community if anyone could give me an advice if this additional seperation point could lead to problems (for the black multi-cable I guess not, but what about the heater lead??).
What do you thingk about?
X/Y-Axis vertical (dis)alignment
in Coffee corner
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@ gr5, I took a look onto the side parts and if I'm correct it wont be possible to enlarge all holes to be in line.
Will try tomorrow to take apart the box...
Nevertheless thank you for this suggestion.