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Wersybot - a derivate of The Printrbot

by wersy, published

Wersybot - a derivate of The Printrbot by wersy Dec 7, 2012
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Summary

Brook Drumm created the wonderful original which is far more rigid and can print much better then most of you would think. It is a great design with small overall dimension but for all that with a big print area. This is the reason that there are a lot of derivates. Thank you very much Brook for that genius idea.
My intention was to be as close as possible to the original parts but with a lot improvements.
Here is one of my first prints: http://www.youtube.com/watch?v=lmT9ujijztQ

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Where did you get the Firmware for your RAMPS board?

Hi,
I would be very glad if you build my Wersybot.
It can be a surprisingly precision printer. It depends only on how accurate you align the rods. They must be absolutely right angled in all directions, which is very easy to control.
And of course the parts should be printed well, mainly the base parts. They are bigger as the originals and therefore a bit more difficult to print without warping.
The smaller you build the printer, the more stable it is.
My printer has a build volume of x =164 mm, y =144 mm, z =165 mm. This size enable to use a PCB heat bed MK2 if needed.
I printed with it all parts of the things you can see on Thingiverse.
And yes, I use the Marlin software. You can download it on GitHub: https://github.com/ErikZalm/Marlin/tree/Marlin_v1https://github.com/ErikZalm/Ma...

Personally, I see no reason to make a derivative of the printrbot with a different name. It is a printrbot with some changes, but I don't think it is enough to change the name.

wersy - in reply to gwc

Looking at it from this perspective, you are correct; although I have modified and upgraded every part of the original Printrbot.
I just wanted to make shure that there can be no mistaking my Printrbot from the original Printrbot.

I can see you put a lot of time and thought into this.  I see a fair number of parts have changed, but I'm not clear why. Could you take a moment to summarize where your improvements are on the previous design? 

wersy - in reply to rrhb

I mean I described all my thoughts very detailed. Did you read all? I'm sorry if you can't see any improvements. Maybe they are not very essential. Anyhow, the print quality is much better as I ever expected :-) 

rrhb - in reply to wersy

apologies - not meant to imply that you weren't getting great results, in fact, the opposite. There were a few places where I wasn't clear whether the change was a result of testing against the original design, trying to use parts you might have had on hand, ensuring 100% metric, experience in building other bots, etc.  Nothing substantial and indeed you documented your thoughts better than most. For instance, the switch to  z-coupler and the reference to the single M4 in the x-end-idler or the x-end motor add'l threaded hole, or separating out the y endstop from the clamp - was this because the original design had issues for you?

wersy - in reply to rrhb

Thank you for your reply. I am glad if anybody is asking for details.
No, I had no experience with 3D printing at all as I started to design. But I watched very intensive all assembly videos of abdrumm several times. Doing so I was sure what I would like to change.
Before this I studied mostly the MendelMax and Mendel90 - theoretically ;-) The only experience I have is with my own Printer now :-)
I prefer nophead's z-coupling because of the plastic hose between the motor shaft and the coupling. I think it gives a good grip makes the connection a bit elastically and allows angular movement if the rod is not straight.
The x-end-idler has no place for a second fixing screw. It would be only possible from the other side. But then the x-ends must be thicker but I want to keep the x-ends slim.
" the x-end motor add'l threaded hole" Which hole exactly you mean?
Much later I found this: http://www.thingiverse.com/thing:17986http://www.thingiverse.com/thi...
It is only a question of time till one comes to similar thoughts.

As I planned I wasn't sure where to place the y-endstop at best.
So I made a separate endstop to mount the endstop holder  wherever I want.

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