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Author Topic: Whole Lab CNC  (Read 2492 times)

tetsuharu

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Whole Lab CNC
« on: October 15, 2012, 11:22:12 AM »
JDBugman and I have been working on this for several weeks now, gone through a first prototype, and have some temporary fixtures up at the lab right now, so it was about time to start a project journal and put up some pictures. (pictures later)


The project is to build something like a pick-n-place machine for the entire lab as cheap and simple as possible.


We started off thinking about reusing the PVC pipe, then we thought about high-tension fishing line. Daniel Grove mentioned paracord, which has a much higher tensile strength than any fishing line and costs less, so we got a bunch of that.

JDBugman 3d designed a contraption that wraps the cord around a drive wheel and printed it out with the reprap. We tested that yesterday and, while it didnt work exactly, the premise of the design will work.


We finally discovered the NFL camera rig diagram while considering new designs (including a delta bot!), and I think we may try that design. More and pictures later.

tetsuharu

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Re: Whole Lab CNC
« Reply #1 on: October 15, 2012, 12:08:55 PM »
To be a little clearer, the goal is to create an assembly that gives lab members computer control over a single point that can be moved anywhere in the garage area of the lab. Stability is not a design goal, and our z axis is likely to just be a winch with a rope on it. We expect to be able to carry small, somewhat light things like multimeters, electronics boxes, sodas and beer, not human weight :(.

The issue with lifting human weight is that we would have to drill into the floor and make some sturdy freakin' mounts for the fixed points and pulleys.

willasaywhat

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Re: Whole Lab CNC
« Reply #2 on: October 16, 2012, 09:50:40 AM »
I told you at TEDx, but this is awesome. If for no other reason, I just want to see it work. :)

tetsuharu

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Re: Whole Lab CNC
« Reply #3 on: October 16, 2012, 09:58:42 AM »
i have cord in my car for tonight, and Mack suggested this site http://www.sdp-si.com/eStore/CoverPg/Drive_Components.htm for pulleys

tomlong74

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Re: Whole Lab CNC
« Reply #4 on: October 16, 2012, 02:09:54 PM »
fun times  8)

tetsuharu

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Re: Whole Lab CNC
« Reply #5 on: October 16, 2012, 10:36:24 PM »
recent photo of tonight's build

jdbugman

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Re: Whole Lab CNC
« Reply #6 on: October 17, 2012, 07:17:26 PM »
I am going to make all three winches tonight all you need to work on is the control, i do not have the knowledge on programing and electronics. I was looking and i found a bunch of steppers in the bins, i am going to use three of them and build it out of pvc and wood for rapid prototyping. but i could remake it in metal or whatever. It should be done tonight, that is my game plan. I have a great design in my head and it should work great.

jdbugman

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Re: Whole Lab CNC
« Reply #7 on: October 18, 2012, 02:48:15 PM »
prototype winch, i am going back today to make the gears then if the design works, i make the files for the computer so i can cnc out of a plastic.

tetsuharu

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Re: Whole Lab CNC
« Reply #8 on: October 19, 2012, 01:44:32 AM »
JDBugman's winch came along very nicely, here's a video of it working.
http://smg.photobucket.com/albums/v404/jdbugman/?action=view&current=WP_20121019_024901Z.mp4
He used practically every tool in the lab. Laser cutter, lathe (scrapped that piece though), bigcnc, drill press.

digitalman2112

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Re: Whole Lab CNC
« Reply #9 on: October 19, 2012, 10:19:55 AM »
Nice use of the BullDuino :)

tetsuharu

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Re: Whole Lab CNC
« Reply #10 on: November 20, 2012, 04:13:45 AM »
just purchased 3x of these winches, http://www.amazon.com/gp/product/B000COTKDM/ref=oh_details_o00_s00_i00 , hoping to continue this project where we left off

PockyBum522

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Re: Whole Lab CNC
« Reply #11 on: November 20, 2012, 11:06:02 AM »
Woah, cool. Those look potent! Are you still going to have it be over the soldering area, or are you gonna give it a bigger range? (Hint: Bigger range is the correct answer :3)

tetsuharu

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Re: Whole Lab CNC
« Reply #12 on: November 20, 2012, 01:27:47 PM »
The plan is to make it span the largest area possible.

I considered buying two other winches:

http://www.vexrobotics.com/276-1546.html
http://blog.trossenrobotics.com/tag/micro-winch/

The first looks kind of flimsy, not sure how stable it'll be. The second says it has a limit of 3 pounds. Considering I can spend $20 more and get thousands of pounds.

P47

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Re: Whole Lab CNC
« Reply #13 on: November 21, 2012, 04:13:19 PM »
Nice work. The winch you got sure looks beefy. The first one in the above post does look pretty flimsy. The second doesn't have much pull, but Trossen products are good and PWM would be nice.
 
Looking forward to seeing it go.