Onodrim -- enlarged build volume TAZ-like machine

Want to use the Open Source Hardware documentation to make your LulzBot 3D Printer do even more? Start here!
geanious
Posts: 18
Joined: Wed Jun 03, 2015 12:02 pm

Re: Onodrim -- enlarged build volume TAZ-like machine

Post by geanious » Wed Oct 07, 2015 11:48 am

The Onodrim was designed primarily to print PLA for the large topographies we have in mind. My experiments with ABS on the TAZ 4 in the I2P lab were unacceptable due to the amount of warp-age from the bed. This is why we left off a heated bed initially.
Below is the second print. An attempted Lithopane 575 mm x 575 mm to print on the entire bed while using a minimum of filament. It had considerable Y-slippage and I stopped the print after 8 hours. We replaced the pulley on the Y-motor with one with fewer teeth and that seems to have solved the slippage problem by increasing the torque exerted.
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geanious
Posts: 18
Joined: Wed Jun 03, 2015 12:02 pm

Re: Onodrim -- enlarged build volume TAZ-like machine

Post by geanious » Wed Oct 07, 2015 12:02 pm

3rd print was stopped when the Y-pulley came loose. PET tape applied.
https://youtu.be/Aguz3LwZ244
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geanious
Posts: 18
Joined: Wed Jun 03, 2015 12:02 pm

Re: Onodrim -- enlarged build volume TAZ-like machine

Post by geanious » Wed Oct 07, 2015 12:11 pm

4th print is of a portion of CU Boulder campus from LiDAR data. It turned out well though, I need to have more top layers to cover the relatively sparse infill (20%). I am now finishing the prints with 4 surface layers.
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geanious
Posts: 18
Joined: Wed Jun 03, 2015 12:02 pm

Re: Onodrim -- enlarged build volume TAZ-like machine

Post by geanious » Wed Oct 07, 2015 12:18 pm

The 5th print is of the full extant of the Pingree Park area that the printer was designed to print. The area in this print will be divided into sixths and each sixth will be printed the full area of the Onodrim bed. This will yield a complete model that is about 5 feet by 3 feet. This print turned out great except for drippage from the hot end. It is visible as the occasional brown spots on the print. I have rebuilt the hot end and have fixed this leak problem.
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geanious
Posts: 18
Joined: Wed Jun 03, 2015 12:02 pm

Re: Onodrim -- enlarged build volume TAZ-like machine

Post by geanious » Wed Oct 07, 2015 2:35 pm

Heating it up. Below are images of the heating solution I decided upon. Kent and I determined that our original plan of 4 12"x 12" bed heaters was too much for the Rambo board to handle (and output much heat). So, I decided on one place in the center of the bed so I could print printer and other parts in ABS to the scale of a TAZ. In addition, I had a piece of .009" Aluminum cut to size and inserted beneath the heated glass. I designed small spacers to hold the aluminum close to the glass without effecting the level of the bed. This bed heating solution works well if the room temperature is warmish. The glass surface is so large that room temperature has a big effect on bed temperature.
Here is a vid of the Onodrim with the heating solution: https://youtu.be/bN28ZoXgX_A
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geanious
Posts: 18
Joined: Wed Jun 03, 2015 12:02 pm

Re: Onodrim -- enlarged build volume TAZ-like machine

Post by geanious » Wed Oct 07, 2015 2:58 pm

I have moved the Onodrim from the I2P lab over to its home at TILT at CSU. Am printing test topographies in preparation for the production runs of the full model. Here is a vid of where Onodrim lives: https://youtu.be/GgqtSuPiJz0
Thanks again to everyone who pitched in on this effort.

rufu5
Aleph Objects | LulzBot
Posts: 249
Joined: Wed Apr 10, 2013 12:25 am

Re: Onodrim -- enlarged build volume TAZ-like machine

Post by rufu5 » Mon Oct 19, 2015 6:01 pm

make make make make make make make make make make make

Suraky
Posts: 5
Joined: Fri Oct 30, 2015 7:44 pm

Re: Onodrim -- enlarged build volume TAZ-like machine

Post by Suraky » Wed Sep 21, 2016 5:53 pm

Hello! I'm enlarging my Taz 5, following the Onodrim design. Thanks for sharing the design, I don't think I would have attempted it without the kind of information I've found for this.

Mine isn't ready to go yet, I still need the glass which has been very hard to source in Canada at the 60cm square size. I noticed the supplier named in this thread ... hopefully they'll ship to Canada.

I have a couple questions ...

I added the roller supports to help take the weight of the bed. In setting them up I found my water-jet cut aluminum undercarriage is a bit warped. How flat was yours? Has it been a problem?

Today I tested the motion of the axes, after updating the firmware for the larger bed size - so far so good, however I notice that when the Y axis reverses direction, the entire bed twists slightly. I think because the Y axis belt pulls the bed from off-center positions, on either side of the axis. The belt is well tensioned. Have you noticed the same, and have you had to do anything about it?

Thank you.

killacycle
Posts: 38
Joined: Mon Apr 04, 2016 2:14 pm

Starting a 1m^3 build volume printer (was: Onodrim -- enlarged build volume TAZ-like machine)

Post by killacycle » Fri Oct 14, 2016 2:49 pm

Very interesting build.

I am embarking on a 1 meter cubed build volume Taz based printer. Just in the beginning phases. Gathering parts. CADing up pieces.

The heated bed is definitely a challenge. Haven't started on that quite yet. I figured on a 120 volt heater as it is obvious that 24 volts is _way_ too many amps, and the power supply would be way too expensive. I was thinking of using the stock Taz temperature sensor, but simply directing the 24 volt heater signal to a soild-state relay which would then control the 120 volt heater(s) on the bed. The solid state relay input has a 3-32 vdc "logic" input, so the Rambo board won't know that there is anything unusual attached to the output, but would have nearly zero load.
The SS relays are $6 on ebay: http://www.ebay.com/itm/231693016931

The silicone heaters (with adhesive) are a bit pricey, but you can buy ~10 of the 12 volt heaters and run them in series for 120 volt operation. Perhaps using multiple silicone strip heaters would be the most economic.

I haven't looked very hard in the Denver area for a 1m x 1m Pyrex (boro-silicate) plate. If anyone has a source for one, I would appreciate hearing about it. <billdube (at) killacycle.com> Shipping a big piece of glass from out of town would be expensive, (and likely unsuccessful.)

I would very likely insulate the underside of the bed to help stabilize the bed temperature and to reduce heating the surroundings. Nothing major, perhaps a 1/4" or 1/2" of insulation.

Since I have chosen a _much_ greater span, I've selected supported linear rails with ball bearing slides to replace the simpler (and cheaper) plain rods and polymer bushings on the Taz.

Bill D.

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