Suggested Design Changes

Re: Suggested Design Changes

Postby fabrice » Wed Jan 01, 2014 2:51 pm

here is the noarc version in 3d

you can hide part (right click) and view an exploded view ( press "E" on the keyboard)
https://dl.dropboxusercontent.com/u/460 ... rc%202.exe
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Re: Suggested Design Changes

Postby fabrice » Wed Jan 01, 2014 2:59 pm

here are the stl parts

let me know for any modifications
Attachments
stl noarc.zip
(200.32 KiB) Downloaded 4544 times
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Re: Suggested Design Changes

Postby cdsteinkuehler » Fri Jan 03, 2014 12:12 am

I'm finally putting together my Wally...going back to the beginning of this thread:

Cozmicray wrote:X-Y ubis mount arm

Flip bolt and hex indent to bring bolt head to front
for ease to tighten / lossen bolts


+1 on this.

Also, it seems like if you rotate the Ubis mount arm 180 deg. around X when printing, you could combine the hub washer with the arm and reduce the printed parts count (like on GUS where the hub bottom has an integral flange for the bearing). The threads for the hub screw will then be unsupported, but they can be 'eased in' with a slope to avoid overhangs if needed.
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Re: Suggested Design Changes

Postby Cozmicray » Fri Jan 03, 2014 3:58 am

cdsteinkuehler Also, it seems like if you rotate the Ubis mount arm 180 deg. around X when printing, you could combine the hub washer with the arm and reduce the printed parts count (like on GUS where the hub bottom has an integral flange for the bearing). The threads for the hub screw will then be unsupported, but they can be 'eased in' with a slope to avoid overhangs if needed.


180 deg about what axis
Threads must be UP to grab hub screw
and also mount hot end down?

Getting good internal threads was difficult.

I use part names at
http://reprap.org/wiki/Wally#Printed_Parts

are you building beta from Nick or rolling your own?


:?: :D
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Re: Suggested Design Changes

Postby cdsteinkuehler » Fri Jan 03, 2014 11:31 am

Cozmicray wrote:180 deg about what axis


Around X, like I said, but around Y works too. What I mean is right now the part prints upside down, with the internal threads down (on the heated bed). If you flip the ubis arm over and print it right-side up, with the threads at the top of the part, the hub washer could be integrated into the arm instead of printed separately.
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Re: Suggested Design Changes

Postby cdsteinkuehler » Fri Jan 03, 2014 11:33 am

Cozmicray wrote:are you building beta from Nick or rolling your own?


I have Beta kits from Nicholas for both GUS and Wally, but I'm printing my own parts.
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Re: Suggested Design Changes

Postby see3d » Sat Jan 18, 2014 6:04 pm

I started a new thread for brainstorming about Wally linear Z axis alternative designs on RepRap.
http://forums.reprap.org/read.php?185,296822
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Re: Suggested Design Changes

Postby Nicholas Seward » Tue Jan 21, 2014 1:26 am

It has been a while but I finally got around to fixing all the issues brought up here with the "xy ubis mount arm".

WALLY NEW ARM.jpg
WALLY NEW ARM.jpg (299.79 KiB) Viewed 82816 times


*Put the nut traps on the other side for easier tightening.
*Flipped print orientation so I could integrate the plastic washer and get 3/4 more threads for the hub screw.
*Added Kossel mount holes so you can use any of the Kossel accessories like fan mounts, leveling probes, etc.
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Re: Suggested Design Changes

Postby Nicholas Seward » Mon Jan 27, 2014 3:22 am

Fixed the bed idler so that the string could not escape easily. It is also easier to print as a bonus. I can pick up the bed to get at the electronics now and then lower it without worrying whether or not the string is still on the idler. (I haven't actually tested it on Wally but my wife and I did some pretty funny play acting. It seems pretty effective.)

WALLY IDLER.PNG
WALLY IDLER.PNG (74.57 KiB) Viewed 82774 times

WALLY IDLER.jpg
WALLY IDLER.jpg (47.74 KiB) Viewed 82774 times
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Re: Suggested Design Changes

Postby a9k » Wed Feb 05, 2014 9:44 pm

As on Jan 26th rev: I found that scaling up by 10X makes z_pulley_holder and z_idler_insert fit together.
Attachments
idler-asmbly.JPG
z idler assembly
idler-asmbly.JPG (87.98 KiB) Viewed 82731 times
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