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Author Topic: MTO.28.08 Wheelchair Joystick Adaptation  (Read 3306 times)
operon
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« on: March 02, 2009, 12:29:48 PM »

Team Leader: Jorge Silva
Description: Client needs an adaptation in his joystick so he can go backwards since his current joystick slips off his hand when he tries to pull it back.

Attached are the files for the second round of the design... one is an image and the other is the actual 3D model, which can be opened with Google SketchUp (http://sketchup.google.com/download/gsu.html)

* joystick.zip (279.33 kB - downloaded 89 times.)
« Last Edit: July 02, 2009, 09:09:32 AM by Jorge Silva » Report to moderator   Logged
operon
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« Reply #1 on: March 03, 2009, 04:17:04 PM »

A picture of a test prototype made at UofT. The real thing is coming soon!


* P1070262.png (93.9 kB, 231x266 - viewed 140 times.)
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operon
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« Reply #2 on: March 25, 2009, 10:14:45 PM »

The latest round... this will be printed (manufactured) soon. Hopefully we will be able to visit the client this weekend or sometime next week.

* joystick2.zip (106.49 kB - downloaded 87 times.)
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operon
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« Reply #3 on: March 26, 2009, 03:18:01 PM »

The prototype has been printed and cured... I'm picking it up today
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operon
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« Reply #4 on: March 26, 2009, 04:03:16 PM »

the prototype!  :)


* DSC00092.JPG (983.21 kB, 2048x1536 - viewed 208 times.)

* DSC00093.JPG (889.29 kB, 2048x1536 - viewed 206 times.)
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operon
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« Reply #5 on: March 27, 2009, 05:27:32 PM »

So who's coming with me to visit the client on Sunday @ 2pm? Alex? Brian? anyone?
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operon
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« Reply #6 on: April 01, 2009, 10:26:07 PM »

The joystick seems to be working well. Left it with the client for a week to see if any changes are needed. If no changes are needed then we will make a second prototype, paint it (the client wants it painted in black) and mail it to him. I forgot some tools in the client's house though... so I may have to go back anyway.

Very close to being done!
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operon
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« Reply #7 on: April 09, 2009, 08:49:40 AM »

The joystick's shaft needs to be 1/4" shorter and painted in black. If anyone is interested in helping out, you can download the joystick2.zip  attachment (added previously to this thread) and use google sketch-up to make the changes. You can then post the sketch-up file here and I can turn it into an STL file for 3D printing.
« Last Edit: May 09, 2009, 10:20:52 AM by Jorge Silva » Report to moderator   Logged
operon
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« Reply #8 on: May 08, 2009, 11:31:19 AM »

I have made the length adjustment for the new prototype but the shaft of the previous one broke after a couple of weeks of use. I think it will be a good idea to re-inforce the next prototype with a metal sleeve... waiting for a tool to come on the mail so I can get it done.
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williamli
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« Reply #9 on: May 27, 2009, 06:45:15 PM »

- the prototype was built, it was very useful but it broke after two weeks because the material used was not strong enough, we used a z-corp 310 printer with zp140 powder

- Jorge sent out an email to the list
- two people have responded, saying that they can manufacture the part
- professor at U of T will manufacture one part and has made useful modifications
- Bill in Aurora will manufacture the other part
« Last Edit: June 01, 2009, 09:18:20 AM by Jorge Silva » Report to moderator   Logged
operon
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« Reply #10 on: May 29, 2009, 09:53:41 AM »

Just to keep things updated, attached are the screenshots of the latest prototypes


* Screenshot.png (212.36 kB, 1280x1024 - viewed 146 times.)

* Screenshot-2.png (265.67 kB, 1280x1024 - viewed 145 times.)
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operon
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« Reply #11 on: June 01, 2009, 08:52:47 AM »

Here are the pictures of the second prototype mounted on the client's wheelchair


* mounted1.JPG (95.1 kB, 787x567 - viewed 152 times.)

* mounted2.JPG (139.61 kB, 912x684 - viewed 162 times.)
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operon
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« Reply #12 on: June 22, 2009, 12:58:57 PM »

Manufacturing is taking too long and resulted more difficult to complete than I originally planned, so I am just going to go to the hardware store after work to see if there is anything I can use. I will try carving out the top piece from a hockey pock and use some metal rod as the shaft. Any suggestions are welcome.
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operon
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« Reply #13 on: June 23, 2009, 12:09:02 PM »

I worked a bit on this last night and found a way to make it that I think will work well... (using an ABS plastic drawer handle from a hardware store and a hockey pock). I had to stop though because I cut my finger with my jackknife but I will go look for an electric cutter today so I can finish carving out the top piece of the joystick from the hockey pock. Since it is rubber, it will cause a lot of friction (so it doesn't slip) and it is also already black so that works quite well!
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operon
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« Reply #14 on: June 25, 2009, 09:14:32 PM »

I finally got the pieces from the machinist (4th prototype). I will buy some tape to cover the top piece and increase the friction and then I'll ship the piece off to the client.


* joystick_v4_1.jpg (63.32 kB, 786x812 - viewed 209 times.)

* joystick_v4_2.jpg (56.28 kB, 714x789 - viewed 146 times.)
« Last Edit: June 25, 2009, 09:18:30 PM by Jorge Silva » Report to moderator   Logged
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