MK42 bed clones finally available?

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david.kiddell
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MK42 bed clones finally available?

Post by david.kiddell » Thu Jun 15, 2017 7:32 pm

Orballo Printing out of Spain is having a pre-order for their MK42 clone beds:

http://orballoprinting.com/en/home/161-mk42.html

Could this be the Euro manufacturer that Tom has mentioned in videos?

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chumm
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Re: MK42 bed clones finally available?

Post by chumm » Thu Jun 15, 2017 8:01 pm

Idk much about heatbed design but their thermal image seems like it's heating from the center rather than the 4 quadrants in the Prusa MK42.
Orballo:
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chenkumi
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Re: MK42 bed clones finally available?

Post by chenkumi » Thu Jun 15, 2017 9:05 pm

Prusa release MK42 heatbed design on github

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I'm not sure they are complete the same , because I do some study in a few days

I calculate the Power of Prusa's MK42 Heatbed , it seems to be over 200W

But the clone one says the power is 140w , this make me very confuse.

In my experience , if this size heatbed only use 140w in 12V , it maybe not enough to heat up if you want to print ABS.

slippyr4
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Re: MK42 bed clones finally available?

Post by slippyr4 » Fri Jun 16, 2017 10:32 am

There are also two people producing it on indigogo - one in the uk, one in norway. I have both on order and expect the first to arrive today.
Self-built Prusa i3 MK2 clone
My things: https://www.thingiverse.com/slippyr4/designs
My Prusa firmware port for ramps & MKS : https://github.com/slippyr4/Prusa-Firmware

keyz
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Re: MK42 bed clones finally available?

Post by keyz » Sat Aug 05, 2017 12:43 pm

I've just received my MK42 from Orballo (after a nealry one month wait after they were supposed to dispatch).

Bed is perfectly flat, so not suffering from the issues I've seen on Indiegogo.

Resistance measured accross the bed is ~1.2 ohms, so about 120W @ 12V if my maths is correct (it may not be :) ).

Not had time to test it yet, as the printer build isn't complete yet.

slippyr4
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Re: MK42 bed clones finally available?

Post by slippyr4 » Sat Aug 05, 2017 2:05 pm

I'd hope it's a bit lower resistance than that; did you subtract the resistance of your test leads?

Perhaps you'll try my firmware when your printer is completed.
Self-built Prusa i3 MK2 clone
My things: https://www.thingiverse.com/slippyr4/designs
My Prusa firmware port for ramps & MKS : https://github.com/slippyr4/Prusa-Firmware

keyz
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Re: MK42 bed clones finally available?

Post by keyz » Sun Aug 06, 2017 3:03 pm

That's a good point - forgot lead resistance! Now looking at ~0.8 Ohm, so ~180W. Not bad!

I've got a Rambo Mini, so going with the official firmware.

keyz
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Re: MK42 bed clones finally available?

Post by keyz » Sun Aug 13, 2017 7:27 pm

All set up now - the bed is working perfectly. Calibrations picked up the probe points no problem, and passed.

First prints out (with the E3D Volcano + Titan). Happily stuck to the bed, first layer was just fine. Settings need some tuning for the Volcano (currently 0.8mm nozzle, printing at 0.6mm layer height), but nothing to do with the bed. Printing with ProtoPasta HTPLA V3 High-Five Blue - my god is this stuff easy to print with, but I can only seem to get 500g and 1KG spools of it in the UK (through hawk3dproto).

Excuse the mess in the photos - Office is being rearranged, and printer is in need of a final pass for cable management :)

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david.kiddell
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Re: MK42 bed clones finally available?

Post by david.kiddell » Fri Aug 18, 2017 2:19 pm

keyz wrote:
Sun Aug 13, 2017 7:27 pm
All set up now - the bed is working perfectly. Calibrations picked up the probe points no problem, and passed.
I just received mine but I'm unclear how to mount it to the carriage. They included 6 (M3?) countersunk screws and four brass standoffs, the standoffs go on the corners? Could you provide details how you did it? I am thinking I might have to make printed spacers..

slippyr4
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Re: MK42 bed clones finally available?

Post by slippyr4 » Fri Aug 18, 2017 2:30 pm

You need 6 screws and 6 standoffs; one for each hole.Get them really nice and tight before you put the PEI on.

Then it screws to the Y axis frame - 4 shorter screws in the corners and the centre two screws are the ones that hold the Y belt holder.
Self-built Prusa i3 MK2 clone
My things: https://www.thingiverse.com/slippyr4/designs
My Prusa firmware port for ramps & MKS : https://github.com/slippyr4/Prusa-Firmware

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