Getting from ORDbot kit --> Usable 3d Printer

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Getting from ORDbot kit --> Usable 3d Printer

Postby WhiteB0rd » Sat Mar 03, 2012 11:18 pm

OK, so I have a Hadron reserved. This will be my first bot, so I have the "chicken - egg" problem, where I will need to source everything necessary for the complete unit externally from Bart's kit.

Electronics, software, not so hard to figure out, lot's of options.

Two big areas of doubt for me are the extruder / hot end assembly and the bed / mount.

I see lots of discussion about the extruder / hot end, but little about the bed. I'm thinking a wades derivative driving a budaschnozzle it going to be the (pardon the pun) hot setup

On the topic of the bed, I have already procured a prusa MK1 heated bed. What I'm not sure of is how it should be mounted to the y carriage, and squared, calibrated, etc to the X-Y-Z... obviously, this has been figured out, is it documented somewhere I haven't found?



Looking forward to discussion and thanks in advance for the information.

WB
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Re: Getting from ORDbot kit --> Usable 3d Printer

Postby JeremyBP » Sun Mar 04, 2012 5:47 am

Two ways to level the bed are a follow.
1) move the nozzle to each corner of the bed, and adjust the height of that corner (with a,screw) until the nozzle just touches a piece of paper. Repeat for all 4 corners.
2) this one is my favorite. Get a cheap dial indicator, and attach it to the carriage. sweep it over the bed and adjust the corners until it is level.
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Re: Getting from ORDbot kit --> Usable 3d Printer

Postby IPvFletch » Sun Mar 04, 2012 2:26 pm

How does #2 work? Would a regular level (or multi-way level) work just as well? (on the bed)
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Re: Getting from ORDbot kit --> Usable 3d Printer

Postby JeremyBP » Sun Mar 04, 2012 3:15 pm

Sure. A dial indicator has a plunger and a dial. Usually, one graduation of the dial corresponds to the plunger moving 0.001". The goal it to sweep it over the bed and watch the needle. Wherever it deflects, adjust the bed so that it goes back to zero. When the needle deflects no more that 0.005" in any given point, the bed is level enough. This works better than a level because a level is absolute. If the rest of the printer is not level and the bed is, then the bed is not level relative to the printer. A dial indicator is relative, so you know that you will always get flat prints.
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Re: Getting from ORDbot kit --> Usable 3d Printer

Postby IPvFletch » Sun Mar 04, 2012 10:21 pm

Good point about a bubble level...

These dial indicators, can you share a link to one? I Google'd it and all I found was a whole bunch of what look like air pressure gauges??
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Re: Getting from ORDbot kit --> Usable 3d Printer

Postby JeremyBP » Sun Mar 04, 2012 10:29 pm

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Re: Getting from ORDbot kit --> Usable 3d Printer

Postby IPvFletch » Mon Mar 05, 2012 1:54 am

Oh, I get it now... "attach it to the carriage" - I re-read your post, sorry. Thanks for the clarification. I really like this idea (dial indicator) the best too.
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