Big Ol' 3d Printer, by Awesomenesser

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Re: Big Ol' 3d Printer, by Awesomenesser

Postby TLHarrell » Thu Apr 26, 2012 9:47 pm

If it is mechanically possible for the print head to strike the leveling screws, I'd probably use countersunk screws instead and have them completely flush to the print bed surface or slightly lower. Nice, simple design though.
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Re: Big Ol' 3d Printer, by Awesomenesser

Postby awesomenesser » Thu Apr 26, 2012 10:29 pm

TLHarrell wrote:If it is mechanically possible for the print head to strike the leveling screws, I'd probably use countersunk screws instead and have them completely flush to the print bed surface or slightly lower. Nice, simple design though.


I did think about that, I figured I could adjust my limit switch stops (I am using all 6 limit switches). It shouldn't be much of an issue because I plan on printing on a piece of glass. The M2 screw heads are only 2mm tall so if I use 1/8" glass I will be fine. Which brings me to my next project, a creative way to hold the glass (I want to avoid binder clips).
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Re: Big Ol' 3d Printer, by Awesomenesser

Postby awesomenesser » Fri Apr 27, 2012 6:45 am

I finished cutting out and assembling my front control panel. Here are a couple pictures of the finished panel on the Hadron.

P1020885 (Custom).JPG
Here is a view of my Hadron with the front panel.


P1020881 (Custom).JPG
Here is a side view of my Hadron.


P1020891 (Custom).JPG
here is a view showing how it is mounted to the frame.


P1020869 (Custom).JPG
Here is a view of the structure and electronics.


Bed time...
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Re: Big Ol' 3d Printer, by Awesomenesser

Postby orcinus » Fri Apr 27, 2012 2:08 pm

Purdy! :shock:
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Metal Spacers and Spring Wire Guides

Postby awesomenesser » Thu May 03, 2012 9:17 pm

I finally finished up the wire organization. I decided to use springs like Bart recommended but I wanted to make sure that it was implemented as cleanly as possible. Also since I am not mounting any electronics to the back panel I needed to come up with a different method. After calculated how many wire AI would need where I chose some spring (X and Y 0.375dia [mcmaster part: 9665K25] and Z 0.437dia [mcmaster part: 9665K91]) sizes and started designing a way to hold the springs (I didnt just want to push them into aluminum because I knew I would be able to drill the correct size hole for a press fit). I cam up with some laser cut acrylic mounts which hold the spring with a press fit and orient the ends the way I wanted.

P1020982 (Custom).JPG
A view of the X spring.


P1020980 (Custom).JPG
A view of the Y and Z springs.


While looking through mcmaster I noticed they has a wide assortment of aluminum spacers so I decided I would replace the nylon ones with aluminum. I never had any issues with the nylon I just don't like how the bearings press into the nylon. The part numbers are listed below.

Aluminum Spacers:
8x 3/8"OD 1/4"Length #10 screw [mcmaster part: 92510A642]
4x 1/4"OD 1.5"Length #6 screw [mcmaster part: 92510A451]

Another modification that I did was to replace the M3 setscrews in the Z axis couplers with some M3x10mm socket cap screws. (I hate how the 1.5mm Allen heads always strip out for me.) I also ground a small flat in the Z axis threaded rods where the screw meets to keep it from spinning is place.

NewMetalStandoffs.png
Here is a picture of the metal spacers and the M3 screw replacement.


This final picture is showing the underside of the Y makerslide/control panel which is where I am going to mount the custom control panel.

P1020988 (Custom).JPG
Picture of the underside pcb mounting location.
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Re: Big Ol' 3d Printer, by Awesomenesser

Postby dzach » Thu May 03, 2012 9:47 pm

I've too replaced the long nylon spacers with aluminum ones, but mine are 10mm OD which I had in stock. Could not find the short ones in alu. With those, my Hadron mechanical parts will be all metal (well, almost). I found that the little twisting allowed by the nylon parts dissappeared completely with the aluminum spacers, and the X-axis is now solid like a rock.
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Re: Big Ol' 3d Printer, by Awesomenesser

Postby mxk » Thu May 03, 2012 11:58 pm

Wow, I really like the spring mounts. Looks great!
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Nice wire management

Postby bdring » Fri May 04, 2012 1:15 pm

That spring arrangement does look really cool. If gives it a real Borg like look to it.

the-borg.jpg
the-borg.jpg (38.83 KiB) Viewed 23393 times
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Re: Big Ol' 3d Printer, by Awesomenesser

Postby RD_SF » Fri May 18, 2012 6:03 pm

Hi Awesomenesser,
Great tips. Will you please post your laser cut spring mounting files? Thanks!
Rob
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Re: Big Ol' 3d Printer, by Awesomenesser

Postby awesomenesser » Sat May 19, 2012 6:18 pm

RD_SF wrote:Hi Awesomenesser,
Great tips. Will you please post your laser cut spring mounting files? Thanks!
Rob


No problem, here they are.

DXF's
XSpringHolder - 6mm Acrylic - Used for X and Y Axis
XSpringHolderBase - 3mm Acrylic - Used for X and Y Axis
ZSpringHolderBottom - 6mm Acrylic - Used if you do not want the Y spring hole
ZSpringHolderBottomWithY - 6mm Acrylic - Used if you do want the Y spring hole
ZSpringHolderTop - 6mm Acrylic

Springs
X and Y Axis - 0.375dia - Mcmaster part: 9665K25
Z Axis - 0.437dia - Mcmaster part: 9665K91

The spring holes tool size was adjusted using cambam until I got a nice press fit. You will need to drill the holes in the plates in order to mount them. Watch out when placing the X axis spring mount on the Z plate to make sure the gantry plate has the needed travel.

P1030099.JPG
This picture shows the gantry travel issue warning and labels the mounts.


P1030100.JPG
This picture labels the other mounts.


Everything uses M4 hardware except the ZSpringHolderBottom[WithY] plates which use M5 hardware.
Attachments
Spring Mounts.zip
DXF files for the spring mounts.
(91.87 KiB) Downloaded 1195 times
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