ORD Bot Hadron

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criznach
Posts: 220
Joined: Sat Dec 14, 2013 5:28 pm
Location: Great Falls, Montana, USA

ORD Bot Hadron

Post by criznach » Mon Jul 21, 2014 8:07 pm

I had some makerslide, v-wheels, and metric hardware on hand, so I decided to start cutting out parts for the ORD Bot Hadron 3d printer.

http://www.buildlog.net/wiki/doku.php?i ... he_ord_bot

I'm cutting the parts from 1/8" and 1/4" aluminum, and 1/16mm G-10. The carriage has been the most challenging piece, because I realized I didn't have a way to bend 1/8" aluminum to the required radius. I ended up making it out of two parts, and bolting them together to form the 90 degree angle.This will be an ongoing project as I get the funds to buy the other components. Belts, pulleys, threaded rods, and steppers are ordered. I still need RAMPS, power supply, hot end, extruder.

Image

WillAdams
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Re: ORD Bot Hadron

Post by WillAdams » Mon Jul 21, 2014 8:47 pm

You can bend aluminum by putting one or a pair of grooves in the inside of where one wants the bend and folding it.
Shapeoko 3XL #0006 w/Makita RT0701 Router w/0.125″ and ¼″ Elaire precision collets
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criznach
Posts: 220
Joined: Sat Dec 14, 2013 5:28 pm
Location: Great Falls, Montana, USA

Re: ORD Bot Hadron

Post by criznach » Mon Jul 21, 2014 10:29 pm

I'll try that next time, but I had fun doing it the hard way! :)

criznach
Posts: 220
Joined: Sat Dec 14, 2013 5:28 pm
Location: Great Falls, Montana, USA

Re: ORD Bot Hadron

Post by criznach » Thu Jul 31, 2014 3:54 pm

Milling motor mounts from 1/8" bar stock.
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Countersinking for belt clearance on the Y axis mount.
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Last edited by criznach on Thu Jul 31, 2014 4:43 pm, edited 1 time in total.

criznach
Posts: 220
Joined: Sat Dec 14, 2013 5:28 pm
Location: Great Falls, Montana, USA

Re: ORD Bot Hadron

Post by criznach » Thu Jul 31, 2014 4:00 pm

Milling carriage parts. I've started using a 4.4mm cut width with a 3.175 end mill on 1/4" or thicker material to prevent chip buildup. It takes longer but has a much higher rate of success.
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Edge drilling carriage parts to 2.5mm. Sprial plunge with 1.6mm end mill and a depth increment of .05mm.
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Finished carriage tapped and assembled. I may redesign this with holes and cutouts for my extruder and hot end. The stock design is very generic and general purpose.
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Last edited by criznach on Thu Jul 31, 2014 4:43 pm, edited 2 times in total.

criznach
Posts: 220
Joined: Sat Dec 14, 2013 5:28 pm
Location: Great Falls, Montana, USA

Re: ORD Bot Hadron

Post by criznach » Thu Jul 31, 2014 4:05 pm

Milling holes for wiring in the frame extrusions. I created a corner jig out of angle brackets, and set a WCS to the corner of the material. Milled to 10.2mm from each side for through-holes.
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Finished bed plate.
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Last edited by criznach on Thu Jul 31, 2014 4:44 pm, edited 1 time in total.

criznach
Posts: 220
Joined: Sat Dec 14, 2013 5:28 pm
Location: Great Falls, Montana, USA

Re: ORD Bot Hadron

Post by criznach » Thu Jul 31, 2014 4:11 pm

Electronics arrive... Cheap ebay 12v 30A power supply sparked and let the smoke out after a few minutes of use. They're sending a replacement. I'm using an XBox 360 203W 16.8A unit I found at a pawn shop for $12. RepRappers say it might be sufficient, but I'll have a backup just in case.
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Wiring has begun. Electronics, motors, and hot-end have been tested.
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Fitting all of the wiring is challenging!
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I'm waiting on belts and some more wire now. I accidentally ordered the belts from the Quantom BOM. DOH!!! Oh, and a heated bed from Sainsmart that might take 2 more weeks to arrive. :(

Auarhau
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Re: ORD Bot Hadron

Post by Auarhau » Fri Aug 01, 2014 9:18 am

This looks fantastic! How did you manage to set 0 so that the holes was drilled in the correct center location on the vertical piece you drilled? Or maybe this was a manual operation and not a single program?
ShapeOko 2. Nema 17 74 oz·in. GAUPS shield on Arduino Uno. DRV8825 Drivers x4 . Kress 1050 FME-1. Z Acme Screw. Threaded inserts table.

criznach
Posts: 220
Joined: Sat Dec 14, 2013 5:28 pm
Location: Great Falls, Montana, USA

Re: ORD Bot Hadron

Post by criznach » Fri Aug 01, 2014 2:12 pm

Auarhau wrote:How did you manage to set 0 so that the holes was drilled in the correct center location on the vertical piece you drilled?
The part was multiple gcode files. Here were the steps...
  • Home the machine and set a work coordinate system to 0,0,0 at the lower left corner of the part (insurance in case you lose your location somehow).
  • Cut the larger holes with a 3.175 bit then screw the part down with washers to prevent scratches.
  • Cut the 2d outline with the same bit.
  • Unscrew the part and remove the MDF board.
  • Bolt the part vertically on t-slot.
  • Home the machine using home switches.
  • Set a WCS to the bottom left of the vertically-oriented part. To do this I use a spare end mill of a known size of 3.14mm. I jog the machine so the spare bit will sit but just barely NOT fall between the part and the cutting bit. Then jog the machine in .1 or .01mm increments until the bit falls through on it's own. Then set your WCS zero for that axis to -<spare bit width>+(<cutting bit width>/2).
  • In this case for a 1.6mm end mill on the y-axis: g10 p1 l20 y-3.94
  • Repeat for other axis.
  • Verify your zero mark in your WCS with something like G90 G54 x0 y0 z<some value higher than the part>
  • If you lose position, re-home and use the WCS to return to zero.

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