macua85
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Posts posted by macua85
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I redigned the hangers and made them smaller, full print area is now useable as the parked heads no longer interfere with the gantry. Also added a support/stiffener. Happy with this design now...although when I was printing it for the first time in a long time I got a blockage and under extrusion. Fixed now though...On to the dual extrusion tests!
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I'll just try changing the print bed size in cura, see what that does. Changing the home coordinates to negative i understand now, but not sure how to do it.
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Yea that's what I was hoping for. For standard umo, you can't place object too close to edges, as cura won't allow it. It knows the boundaries with reference to nozzle position. I'd like to do the same for this custom setup. Tell it that the front 40mm of bed are not part of printable area.
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Ultiarjan, was that Printed with simplify3d? Have you managed to properly set your print area and boundaries in that program? I wish I had as much luck printing abs...I always get it lifting off the bed.
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Height adjust works well. Just need to wire up the second head and test now. Also need to tweak the hangers so that the heads sit further to the side, too lazy to adjust limits to compensate and don't want to lose my print area!
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Damn, that's all sounding a little over my head. Is it simpler to set these kind of settings in Simplify3d?
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Printed the adjustable head last night, assemble it roughly and the mechanism is going to work nicely, all clearances good. The only cock up I made was to leave 'extensive stitching' option on, so all of my holes have been printed over! Nightmare, but i'll just drill them out instead tonight.
I do have a query though. With my setup the front portion of the machine lies in unprintable territory. How do I account for this in Cura so that my models sit in the right relative place when I prepare prints? I understand I can adjust the print area in the Y direction, but how does it adjust it? Will it make it smaller based on the centre line of the x axis, or will it just trim it off the front?
It would be nice if I was able to set the extruder 1 offset from the, for example, X gantry centre line and Y gantry centreline......and for cura to work out the printable area from that (and based on the second extruder offsets from the first).
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Yea I did the same too, all cables on mine are plug and play. Used RC xt batter connectors for the heaters, and smaller ones for fans etc.
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How did the parts turn out by the way for the above design?
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Ah yes, that is quite a difference! Looks like this design is for UMO only at the moment. If there is any interest, I can work at swapping the axis around on the design for it to suit UM2, but I have no way of testing it for other bugs.
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Hey Ultiarjan, i've got around to uploading the stl files to youmagine so that you can have a look at the main module design. Not uploaded the adjustable e3d holder yet as I want to test it first. Is the gantry geometry the same on the UM2 as the UMO? If so this design may work on yours too if you want to try it out.
Link: https://www.youmagine.com/designs/e3d-v6-modular-print-system-magnetic-final
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So the accuracy test turned out very well, with the exception of mad stringing due to my poor retraction settings and generally poor gcode. It's become clear that this is a big part of the project, not just the mechanical aspects.
And cleaned up:
So the xy layer accuracy looks good. I need to do a couple of tweaks to adjustable design, then I'll crack on with printing and installing that. Looks like a purchase of simplify3d is required here too.
And for ultiarjan, here's a robot I just printed with this setup with the integral fan. 0.1 layers, 65mm/s, no infill:
Sorry about orientation of photos, they are fine on phone but upload wrong.
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Thanks for the feedback guys. I'm trying the test print again now with the gcode supplied by tinkergnome. I had already written a command to slow the head down for the drop off and the pick-up as I thought that could be a problem. This test is 50 layers, will report back in 20 mins with the results!
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This is the adjustable unit. An allen wrench can be put through the hole in the top, and the bolt (shown installed) turned to make the whole unit move up and down in relation to the fixed portion (that houses the magnets.
The fixed part houses a nut in the slot (tight fit)
Slide up from the bottom to assemble. Although I've not printed and tested it yet, I can't see why it wouldn't work as long as its all a snug fit.
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Ultiarjan, the fan seems to work well. The hangar was printed with the new headsystem and came out really nicely. I'll print a robot tonight to show you guys. I also think the e3d prints much better than the OEM ultimaker nozzles, not sure why, maybe to do with the funky shoulder it has.
Neotko, i'll keep an eye out for that. The head is a pretty snug fit in the holder so hoping it wont be a problem. If it does seem to be, i'll put a slight angle on the holder (small enough that the magnets can still engage ok), to hold it in. The head for the other side will be slightly large as it has the height adjustment mechanism in it, an additional 6mm or so of depth.
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Wow, simplify3d isn't cheap! Did you guys all buy a copy of this?
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Hi Zoe,
Thanks for the heads up about the residue. I'm using light machine oil, not sure if it will also crease a residue, but i'll keep and eye out for it. This oil instruction should be made official by e3d, or at least to advise it if all else appears to be well and its clogging. I do have to say though, the support from e3d and Sanjay is impeccable. Despite the issues I have had, I would certainly recommend them. The print quality once I got it working was/is excellent. And the cheap and large range of nozzle options is definitely a major plus. I'm looking forward to tying to print nylon, and maybe some PEEK if I get around to ordering some. Does anyone know how to hack the UM firmware to print higher than 260 degrees?
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A quick photo of my (now tested and working!) setup with one extruder for now. I'm printing the height adjustable unit tonight which will sit on the back right of the machine.
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Thanks for the suggestions guys. Tinkergnome, i'll give that a go tonight. I did try using the G10 G11 commands, but for some reason they didn't work. Does the gcode need a reference in it somewhere for the standard retract length at the beginning for it to work?
All in all though, sounds like simplify3d is the way to go with this setup for full functionality, at least until Cura catches up (if the ultimaker team find these developments interesting enough). I'll start using simplify3d once i've confirmed the repeat accuracy.
Ultiarjan, what settings are you using for XT? I found layer adhesion wasn't very good until I started to print around 248 degrees. But yea, its a little more brittle. However I've printed flexible clip on parts without issue.
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If you read the info from ultiarjan or my pdf about how to insert the tool change I think you can get the picture of how to do it.
Cheers I had a look at that, but i'm using cura and just for now want to manually add the code with retraction, that the bit i'm super struggers with.
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Ok now I understand my mistake. It appears that the extrusion code is cumulative, so when it retracts for example by 2mm, it goes from 56mm (cumulative) to 54mm, then back to 56 after the X/Y steps have been completed. So the question is then, how on earth do you manually add retractions into gcode in cure?
Here is extract showing this retraction in action:
G1 X77.783 Y32.384 E7.86578
G1 F2400 E5.86578
G0 F9000 X81.183 Y35.784
;TYPE:WALL-OUTER
G1 F2400 E7.86578
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IM SO FRUSTRATED! So close, but i can't get this damn gcode right. So this is what I've written to test the head change accuracy, which works:
;LAYER
G92 E0
G1 E-2.5
G92 E0
G0 F9000 X100.000 Y180.000
G0 F9000 Y192.7
G0 F9000 X64.000
G0 F3000 X16.000
G0 F5000 Y100.000
G0 F5000 X100.000 Y100.000
G0 F5000 X16.000
G0 F9000 Y180.000
G0 F3000 Y192.700
G0 F3000 X64.000
G0 F9000 X100
G1 F200 E2.5
G92 E0
;FINISH
So in the gcode, I did a look up for ';LAYER', and inserted the above. This works fine too. However when it uses the above code, after going back to the print, it does a huge rapid retraction, maybe 20-40mm or something, its crazy. I can't work out why its doing it, can anyone here help?
This is the beginning few layers of the gcode :
M190 S70.000000
M109 S218.000000
;Sliced at: Mon 13-07-2015 17:37:18
;Basic settings: Layer height: 0.2 Walls: 0.4 Fill: 100
;Print time: 13 minutes
;Filament used: 0.305m 2.0g
;Filament cost: None
;M190 S70 ;Uncomment to add your own bed temperature line
;M109 S218 ;Uncomment to add your own temperature line
G21 ;metric values
G90 ;absolute positioning
M82 ;set extruder to absolute mode
M107 ;start with the fan off
G28 X0 Y0 ;move X/Y to min endstops
G28 Z0 ;move Z to min endstops
G1 Z15.0 F9000 ;move the platform down 15mm
G92 E0 ;zero the extruded length
G1 F200 E3 ;extrude 3mm of feed stock
G92 E0 ;zero the extruded length again
G1 F9000
;Put printing message on LCD screen
M117 Printing...
;Layer count: 50
;LAYER
G92 E0
G1 E-2.5
G92 E0
G0 F9000 X100.000 Y180.000
G0 F9000 Y192.7
G0 F9000 X64.000
G0 F3000 X16.000
G0 F5000 Y100.000
G0 F5000 X100.000 Y100.000
G0 F5000 X16.000
G0 F9000 Y180.000
G0 F3000 Y192.700
G0 F3000 X64.000
G0 F9000 X100
G1 F200 E2.5
G92 E0
;FINISH0
M107
G0 F9000 X67.588 Y29.055 Z0.300
;TYPE:SKIRT
G1 F1200 X85.228 Y29.055 E0.33182
G1 X85.228 Y9.055 E0.70803
G1 X92.128 Y9.055 E0.83782
G1 X92.128 Y29.055 E1.21403
G1 X105.727 Y29.055 E1.46984
G1 X105.727 Y9.055 E1.84605
G1 X112.627 Y9.055 E1.97584
G1 X112.627 Y29.055 E2.35205
G1 X132.627 Y29.055 E2.72826
G1 X132.627 Y35.955 E2.85806
G1 X112.627 Y35.955 E3.23427
G1 X112.627 Y48.555 E3.47128
G1 X132.627 Y48.555 E3.84749
G1 X132.627 Y55.455 E3.97729
G1 X112.627 Y55.455 E4.35350
G1 X112.627 Y75.455 E4.72971
G1 X105.727 Y75.455 E4.85950
G1 X105.727 Y55.455 E5.23571
G1 X92.128 Y55.455 E5.49152
G1 X92.128 Y75.455 E5.86773
G1 X85.228 Y75.455 E5.99752
G1 X85.228 Y55.455 E6.37373
G1 X67.588 Y55.455 E6.70555
G1 X67.588 Y48.555 E6.83534
G1 X85.228 Y48.555 E7.16716
G1 X85.228 Y35.955 E7.40417
G1 X67.588 Y35.955 E7.73599
G1 X67.588 Y29.055 E7.86578
G1 F2400 E5.86578
G0 F9000 X70.988 Y32.455
;TYPE:WALL-OUTER
G1 F2400 E7.86578
G1 F1200 X88.628 Y32.455 E8.19760
G1 X88.628 Y12.455 E8.57381
G1 X88.728 Y12.455 E8.57570
G1 X88.728 Y32.455 E8.95191
G1 X109.127 Y32.455 E9.33562
G1 X109.127 Y12.455 E9.71183
G1 X109.227 Y12.455 E9.71371
G1 X109.227 Y32.455 E10.08993
G1 X129.227 Y32.455 E10.46614
G1 X129.227 Y32.555 E10.46802
G1 X109.227 Y32.555 E10.84423
G1 X109.227 Y51.955 E11.20915
G1 X129.227 Y51.955 E11.58537
G1 X129.227 Y52.055 E11.58725
G1 X109.227 Y52.055 E11.96346
G1 X109.227 Y72.055 E12.33967
G1 X109.127 Y72.055 E12.34155
G1 X109.127 Y52.055 E12.71776
G1 X88.728 Y52.055 E13.10148
G1 X88.728 Y72.055 E13.47769
G1 X88.628 Y72.055 E13.47957
G1 X88.628 Y52.055 E13.85578
G1 X70.988 Y52.055 E14.18760
G1 X70.988 Y51.955 E14.18948
G1 X88.628 Y51.955 E14.52130
G1 X88.628 Y32.555 E14.88622
G1 X70.988 Y32.555 E15.21804
G1 X70.988 Y32.455 E15.21992
G1 F2400 E13.21992
G0 F9000 X88.728 Y32.555
G1 F2400 E15.21992
G1 F1200 X88.728 Y51.955 E15.58485
G1 X109.127 Y51.955 E15.96856
G1 X109.127 Y32.555 E16.33349
G1 X88.728 Y32.555 E16.71720
;LAYER
G92 E0
G1 E-2.5
G92 E0
G0 F9000 X100.000 Y180.000
G0 F9000 Y192.7
G0 F9000 X64.000
G0 F3000 X16.000
G0 F5000 Y100.000
G0 F5000 X100.000 Y100.000
G0 F5000 X16.000
G0 F9000 Y180.000
G0 F3000 Y192.700
G0 F3000 X64.000
G0 F9000 X100
G1 F200 E2.5
G92 E0
;FINISH1
M106 S153
G0 F9000 X88.728 Y32.555 Z0.500
;TYPE:WALL-OUTER
G1 F1320 X88.728 Y51.955 E16.96049
G1 X109.127 Y51.955 E17.21630
G1 X109.127 Y32.555 E17.45958
G1 X88.728 Y32.555 E17.71539
G0 F9000 X88.728 Y32.455
G1 F1320 X109.127 Y32.455 E17.97120
G1 X109.127 Y12.455 E18.22201
G1 X109.227 Y12.455 E18.22327
G1 X109.227 Y32.455 E18.47407
G1 X129.227 Y32.455 E18.72488
G1 X129.227 Y32.555 E18.72613
G1 X109.227 Y32.555 E18.97694
G1 X109.227 Y51.955 E19.22023
G1 X129.227 Y51.955 E19.47103
G1 X129.227 Y52.055 E19.47229
G1 X109.227 Y52.055 E19.72309
G1 X109.227 Y72.055 E19.97390
G1 X109.127 Y72.055 E19.97516
G1 X109.127 Y52.055 E20.22596
G1 X88.728 Y52.055 E20.48177
G1 X88.728 Y72.055 E20.73258
G1 X88.628 Y72.055 E20.73384
G1 X88.628 Y52.055 E20.98464
G1 X70.988 Y52.055 E21.20586
G1 X70.988 Y51.955 E21.20711
G1 X88.628 Y51.955 E21.42832
G1 X88.628 Y32.555 E21.67160
G1 X70.988 Y32.555 E21.89282
G1 X70.988 Y32.455 E21.89407
G1 X88.628 Y32.455 E22.11528
G1 X88.628 Y12.455 E22.36609
G1 X88.728 Y12.455 E22.36734
G1 X88.728 Y32.455 E22.61815
;LAYER
G92 E0
G1 E-2.5
G92 E0
G0 F9000 X100.000 Y180.000
G0 F9000 Y192.7
G0 F9000 X64.000
G0 F3000 X16.000
G0 F5000 Y100.000
G0 F5000 X100.000 Y100.000
G0 F5000 X16.000
G0 F9000 Y180.000
G0 F3000 Y192.700
G0 F3000 X64.000
G0 F9000 X100
G1 F200 E2.5
G92 E0
;FINISH2
G0 F9000 X88.728 Y32.455 Z0.700
;TYPE:WALL-OUTER
G1 F1500 X109.127 Y32.455 E22.87396
G1 X109.127 Y12.455 E23.12477
G1 X109.227 Y12.455 E23.12602
G1 X109.227 Y32.455 E23.37683
G1 X129.227 Y32.455 E23.62764
G1 X129.227 Y32.555 E23.62889
G1 X109.227 Y32.555 E23.87970
G1 X109.227 Y51.955 E24.12298
G1 X129.227 Y51.955 E24.37379
G1 X129.227 Y52.055 E24.37505
G1 X109.227 Y52.055 E24.62585
G1 X109.227 Y72.055 E24.87666
G1 X109.127 Y72.055 E24.87791
G1 X109.127 Y52.055 E25.12872
G1 X88.728 Y52.055 E25.38453
G1 X88.728 Y72.055 E25.63534
G1 X88.628 Y72.055 E25.63659
G1 X88.628 Y52.055 E25.88740
G1 X70.988 Y52.055 E26.10861
G1 X70.988 Y51.955 E26.10987
G1 X88.628 Y51.955 E26.33108
G1 X88.628 Y32.555 E26.57436
G1 X70.988 Y32.555 E26.79558
G1 X70.988 Y32.455 E26.79683
G1 X88.628 Y32.455 E27.01804
G1 X88.628 Y12.455 E27.26885
G1 X88.728 Y12.455 E27.27010
G1 X88.728 Y32.455 E27.52091
G0 F9000 X88.728 Y32.555
G1 F1500 X88.728 Y51.955 E27.76419
G1 X109.127 Y51.955 E28.02000
G1 X109.127 Y32.555 E28.26329
G1 X88.728 Y32.555 E28.51910
;LAYER
G92 E0
G1 E-2.5
G92 E0
G0 F9000 X100.000 Y180.000
G0 F9000 Y192.7
G0 F9000 X64.000
G0 F3000 X16.000
G0 F5000 Y100.000
G0 F5000 X100.000 Y100.000
G0 F5000 X16.000
G0 F9000 Y180.000
G0 F3000 Y192.700
G0 F3000 X64.000
G0 F9000 X100
G1 F200 E2.5
G92 E0
;FINISH3
G0 F9000 X88.728 Y32.555 Z0.900
;TYPE:WALL-OUTER
G1 F1620 X88.728 Y51.955 E28.76238
G1 X109.127 Y51.955 E29.01819
G1 X109.127 Y32.555 E29.26148
G1 X88.728 Y32.555 E29.51729
G0 F9000 X88.728 Y32.455
G1 F1620 X109.127 Y32.455 E29.77310
G1 X109.127 Y12.455 E30.02391
G1 X109.227 Y12.455 E30.02516
G1 X109.227 Y32.455 E30.27597
G1 X129.227 Y32.455 E30.52677
G1 X129.227 Y32.555 E30.52803
G1 X109.227 Y32.555 E30.77884
G1 X109.227 Y51.955 E31.02212
G1 X129.227 Y51.955 E31.27293
G1 X129.227 Y52.055 E31.27418
G1 X109.227 Y52.055 E31.52499
G1 X109.227 Y72.055 E31.77580
G1 X109.127 Y72.055 E31.77705
G1 X109.127 Y52.055 E32.02786
G1 X88.728 Y52.055 E32.28367
G1 X88.728 Y72.055 E32.53448
G1 X88.628 Y72.055 E32.53573
G1 X88.628 Y52.055 E32.78654
G1 X70.988 Y52.055 E33.00775
G1 X70.988 Y51.955 E33.00900
G1 X88.628 Y51.955 E33.23022
G1 X88.628 Y32.555 E33.47350
G1 X70.988 Y32.555 E33.69471
G1 X70.988 Y32.455 E33.69596
G1 X88.628 Y32.455 E33.91718
G1 X88.628 Y12.455 E34.16798
G1 X88.728 Y12.455 E34.16924
G1 X88.728 Y32.455 E34.42005
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So tonight I'm ready to do the repeat accuracy test with one head (park and resume). Can someone give me some instruction on how to edit the gcode? I know to do it in text edit with lookup and replace commands, but not sure where to insert etc. Also, how did you find the right coordinates for the head parking? From the ulticontroller? and finally, what is the 'F' command in the gcode before the XY coordinates?
Thanks
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Just to update this since my last post... I now have the e3d working. It turned out that adding a little oil to the e3d sorted everything out. Hope that snippet of info helps to save someone else a lot of time and headaches!
A different multi-extrusion approach - UM tool / printhead changer
in Third party products & modifications
Posted
First print! Calibration looks pretty good, should have printed at 0.1 really, 0.2 a bit coarse for such a small print. More challenging print coming tomorrow. Mechanism works very well.