macua85
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Posts posted by macua85
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This is the last part, and then i'll hopefully have a working system...although I can't print it at the moment due to the e3d blocking continuously and under extruding. Not going to upload it until I have printed it and tweaked it to make sure its right. No glue required, mechanical fixings (normal 3mm ultimaker style screws).
Hope to resolve the blockage thing tomorrow....but if anyone has any suggestions they would be very welcome!
Thanks,
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So disappointed....the design works great, but I can't print any more than an hour before the e3d gets blocked...what to do!?maybe try with no retraction.
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The finished print head:
On the Printer:
First Print (as it came off the printer, XT, 0.2 layer height):
I've had a blocked e3d problem, hoping that doesn't continue to happen, as I don't know the cause.
I'm now printing the tool holder for the corners of the machine, fingers crossed it doesn't block half way through!
AS a note, 2 magnets are sufficient to hold the head firmly in place, as seen on the robot, layers are accurately positioned.
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Guys, Printed my design today and have to say it prints very well and fits the e3d perfectly. I'll fit it tomorrow and post videos. I'm probably going to re-use the original UMO bearings as i'm that confident in this design! Ive just installed 2 of the 6 magnets to start with. They seem to have pretty good holding power now I don't have the skin in front of them (12x6x3mm magnets), but test prints will determine whether this is enough for bowden tube setup.
Will report back soon!
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Neotko, where did you order the bearings from?
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Had some time to work on the this today. I've taken all of my other versions down, and uploaded version 5. I've probably said it before, but I think this is the one. I'm printing it now, will soon be able to tell if its going to work. I've added support for the main module to make printing easier...even with support mine was lifting in the corner.
https://www.youmagine.com/designs/e3d-v6-modular-print-system-magnetic
Purpose of redesign was to make magnets more efficient (removing the skin), and adding rigidity to the e3d carriage. I've incorporated somewhere to mount the thermocouple amplifier on the e3d module, and fan wire slots on the main carriage. I'm pretty sure with the magnets in direct contact, there should be plenty of holding power.
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Yea thats the reason I want to use another set of bearings. I tried my first iteration of this design last weekend which failed. Would have taken forever to get a working printer again had I taken the bearings out of my UMO hotend. But then again, I leave that fully assembled and just use the heater and thermocouple driver for the new part so its easy to put back together.
I'm hoping for another iteration this weekend, already started the deigns...but I need the bearings before i can do any testing.
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Neotko - I wouldn't recommend the 'skin' over the magnet approach. I have tried this and is has quite a big impact on the holding force of them.
Are you going to recycle your UMO linear bearings of buying spare set?
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Hi Sander,
No worries if cant help, but I also raised a ticket for some parts to complete my slightly different attempt at this. Its ticket number View Ticket: #VKV-691-87184 if you do get a chance to look into it (only raised today so certainly not expecting to hear back yet).
Thanks
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That new design looks like it does away with the modular system you were using before?
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This is the problem i foresaw, which is why i have so many magnets. seeing how well it holds with just those, i'm pretty confident if I get rid of the 'skin'on mine, I should have no problems. then its just a case of the linear bearings and getting some good quality ones.
Great progress for the UM2 group there though for sure!
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No the ones I got were from e3d. Recommend the robotdigg ones?
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Foehnsturm, yea with me design I left a 'skin' in front of the magnets (0.3mm), and pushed them in from the back. The idea of this was to make it so that they could be easily removed and no need for glue. Have you just made yours a tight push fit?
The bearings seems to be the biggest area of play, very disappointed with those. I guess I'll have to use the oem UMO ones; I was trying to avoid ripping the original print assembly apart incase this doesn't work out. Anyone know where I can buy either oem or good quality replacements?
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I think a flex3drive would have similar problems too as its essentially the same as a bowden. Hmmm, one more go, then its off to a dual e3d print head design.
Foehnsturm, out of interest, how do you hold your magnets in place?
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I tried my design tonight. There is too much play with the bowden tube exerting force. Also too much flex (the e3d bearing had a lot of play, and the e3d module I designed need more support. I've spend the evening deciding how to proceed, and whether to give up or not! I'll try one more design now I know where the problem spots are. Only annoying thing is i've got to rebuilt my printer back to original now to print the new designs!
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Hey guys,
I have a slightly related question. I am changing over to E3D V6 on my UMO, and have elected to used the k-type thermocouples sold by e3d with the standard/original UMO amplifier board. Will I need to change any of the firmware configurations for this?
Thanks for any help
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Great results. How long did the gcode take to edit?
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I think this is my final iteration of this now. I'm hoping I got the offsets right for the bearings. I decided to go with this design as it means pretty much the whole bed area is useable with both of the nozzles (stored in the back right and left of the machine). I've not finished that bit yet, but will work on it when i've tested this part.
https://www.youmagine.com/designs/e3d-v6-modular-print-system-magnetic
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Ok thanks, I think I understand. But would you mind sending me a sample gcode so I can have a looksee?
Im just printing hopefully the final iteration of my tool carriage. But I can do too much more until the parts fun up from e3d (I forgot to order the k type thermocouples). I hope to show some proper progress soon. It will be interesting to compare the bowden vs direct extruder setup. Ultimate goal definitely mutley3d flex for me though, but the bodwen will be a good acid test to see if the added rigidity affect the magnetic holding while printing and moving.
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Have you checked your bed levelling?
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Hi Foehnsturm,
Any videos of the latest? May I ask, how are you compiling the gcode for this modification. How did you figure the coordinates and commands for the tool change? Is there a program which displays the heads coordinates in real time?
Thanks,
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Umm, wouldn't it be multiple nozzles that you need, and 1 bed?!
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I've been away for a week, but will continue to develop this this week. Regrettably I forgot to order the thermistors from e3d so that will slow progress a bit...I've decided to use UMO heaters with the e3d thermistor set up and a firmware alteration.
Mutely I'll be in touch once this phase of testing is done. Interested about these titbits!
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A guess and a long shot, but have you tried reinstalling the firmware?
A different multi-extrusion approach - UM tool / printhead changer
in Third party products & modifications
Posted
Hi Jonny,
Yea after reading around I've come to the same conclusion. Im guessing the problem won't persist with no retractions. So I'm planning to adjust the holder and hopefully get it to print well enough for the first iteration, and then if successful I should be able to print a good one. I'm also going to up the voltage to the 30mm fan in the meantime, as I've connected it to variable voltage controller.