macua85

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.

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!

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.

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.

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.

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!

Damn, that's all sounding a little over my head. Is it simpler to set these kind of settings in Simplify3d?

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).

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.

How did the parts turn out by the way for the above design?

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.

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

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.

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!

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.

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.

Wow, simplify3d isn't cheap! Did you guys all buy a copy of this?

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?

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.

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.

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.

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

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

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

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!