Bed leveling issue - how is this even possible? June 28, 2014 06:32PM |
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Re: Bed leveling issue - how is this even possible? June 28, 2014 09:03PM |
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Re: Bed leveling issue - how is this even possible? June 29, 2014 03:57AM |
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Re: Bed leveling issue - how is this even possible? June 29, 2014 04:08AM |
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Re: Bed leveling issue - how is this even possible? June 29, 2014 04:12AM |
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jstck
What I meant was that even the slight pressure from the hotend nozzle on the paper can be enough to slightly move the bed.
Re: Bed leveling issue - how is this even possible? June 29, 2014 04:14AM |
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Re: Bed leveling issue - how is this even possible? June 29, 2014 04:20AM |
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dc42
Even if the x-plate is initially flat, the bowden tube exerts a horizontal force on the head that varies with x-position. If you have the extruder hung on the middle slot, then this force is greatest near the middle of the x-axis, which causes the effect you observe.
Re: Bed leveling issue - how is this even possible? June 29, 2014 04:23AM |
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Re: Bed leveling issue - how is this even possible? June 29, 2014 04:29AM |
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Re: Bed leveling issue - how is this even possible? June 29, 2014 05:03AM |
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Re: Bed leveling issue - how is this even possible? June 29, 2014 08:01AM |
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Re: Bed leveling issue - how is this even possible? June 29, 2014 08:53AM |
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Re: Bed leveling issue - how is this even possible? June 29, 2014 10:19AM |
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Re: Bed leveling issue - how is this even possible? June 29, 2014 10:42AM |
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Sardi
...I have a friend that works with wood, and he had an idea to make the bed out of MDA but at least 0.5cm thick, and also thicker Y axis cross rib, this is what he brought me today:
Re: Bed leveling issue - how is this even possible? June 29, 2014 10:49AM |
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Re: Bed leveling issue - how is this even possible? June 29, 2014 11:13AM |
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ormerod168
Notice how the force of the tube is at its hight in the middle of the bed
X25 Z0.0
X50 Z0.1
X75 Z0.1
X100 Z0.2
X125 Z0.2
X150 Z0.1
X175 Z0.05
X200 Z0.0
So my starting point is no longer to make the bed stable and flat, it is to make the x-axis ditto
..or to rewrite spoon-boys Matrix quote:
"Then you'll see, that it is not the glass that bends, it is only your x-axis."
Erik
Re: Bed leveling issue - how is this even possible? June 29, 2014 11:42AM |
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Re: Bed leveling issue - how is this even possible? June 29, 2014 02:53PM |
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Sardi
Exactly my problem! I never believed that the glass warped or something.
So does this mean the X-axis needs replacement?
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Maybe it could go ok if I center the Z in the middle (x100 y100) now that I am sure that the bed is level, and that the whole bed section is more massive and rigid.
Re: Bed leveling issue - how is this even possible? June 29, 2014 03:04PM |
Registered: 9 years ago Posts: 138 |
Re: Bed leveling issue - how is this even possible? June 29, 2014 03:33PM |
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muggi
Hi ormerod168,
nice alu y-rib and Y-cross rib.
I want these...... any hint where to get this?
Re: Bed leveling issue - how is this even possible? June 29, 2014 10:38PM |
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Re: Bed leveling issue - how is this even possible? June 30, 2014 04:06AM |
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ormerod168
My choice would be to change the acrylic rib for the alu one
Re: Bed leveling issue - how is this even possible? June 30, 2014 09:14AM |
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Re: Bed leveling issue - how is this even possible? June 30, 2014 01:25PM |
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Sardi
..I find it very hard to belive that this long piece of acryl would bend only in the middle. I find it more logical for it to bend on the far end and downwards, but only in the middle? That is what confuses me.
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Couldnt it be that the smooth rod, on wich the whole weight of the hot end sits, gets bent in the middle?
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ps my extruder is hooked on the last slot, near the far end.
Re: Bed leveling issue - how is this even possible? June 30, 2014 01:34PM |
Registered: 10 years ago Posts: 1,230 |
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jstck
..The rod _could_ be bent, but those are usually machined with pretty high precision, and darned stiff. It won't move anywhere near 0.2mm under the weight of the hotend, for sure. If it is not quite straight, you could test that by rolling it on a flat surface, or just rotating it 180 degrees in place and see if the error gets "inverted". I'm willing to bet it won't...
Re: Bed leveling issue - how is this even possible? June 30, 2014 02:09PM |
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Re: Bed leveling issue - how is this even possible? June 30, 2014 03:04PM |
Registered: 10 years ago Posts: 1,230 |
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Davek0974
..The good thing with the aluminium arm is that if care is taken to carefully fine tune fit of the rib to the arm, it can be assembled in a very straight fashion..
Re: Bed leveling issue - how is this even possible? July 08, 2014 05:15PM |
Registered: 10 years ago Posts: 466 |
Re: Bed leveling issue - how is this even possible? July 09, 2014 07:33AM |
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Re: Bed leveling issue - how is this even possible? June 12, 2015 07:27PM |
Registered: 11 years ago Posts: 1,277 |
Same here and I have tried everything but after 1.5 years and thousands of hours to get this thing to work I give it up today. Just too many issues to have fun with it imo and I don't care if it is PEBKAC or there really are issues in the printer I haven't printed enough to actually have fun. All aluminum I3 Rework with mods galore and nothing fixed the 4 corner ball buster so it isn't just the Ormerod that has these issues.Quote
Sardi
It seems to me that this printer is a lot of work. Ive bought it for home fun, but must admit Ive spent more time tuning it then printing. I already have DC42s sensor, modified heat sinks, Z rod gears, extruder gears.. and now I need an aluminium bed plane and maybe aluminium X rib... Does this ever end?
I know this is a kit, but when you need to purchase and print a bunch of additional parts for it to work properly, than it just isnt worth the money or the time. Will think about daveks aluminium plate, but then I can just hope that this is the last update Ill need.
Ive literllay spent more time fixing this machine than enjoying the prints.
OT:
I have zeroed the Z in the middle (x100 y100) and it seems to do just fine. For now at least.