Parallax's motor/wheel combo and track's
Hi,·
·I've been thinking that the motor/wheel combo should be offered with tracks or as a add-on·.Would anybody else like to see this and if so what configuration would you like to see the tracks in. I've included 3 crude drawings of different track setups; any input would be greatly appreciated.
·
Brian
·
·I've been thinking that the motor/wheel combo should be offered with tracks or as a add-on·.Would anybody else like to see this and if so what configuration would you like to see the tracks in. I've included 3 crude drawings of different track setups; any input would be greatly appreciated.
·
Brian
·
Comments
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"A complex design is the sign of an inferior designer." - Jamie Hyneman, Myth Buster
DGSwaner
Post Edited (Dgswaner) : 8/7/2008 5:59:40 PM GMT
I like the three wheel versions best.
I have attahed a rotated version of one scheme.·A scheme like this would give the tracks some slight climbing abiltiy.
See also the mattracks configuration attached
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Whit+
"We keep moving forward, opening new doors, and doing new things, because we're curious and curiosity keeps leading us down new paths." - Walt Disney
·I have never seen that track setup, looks cool. Do you think that they have a patent on that layout? Here is a little project I've been working on in my "spare time". It's to big for the wheel/motor combo but it might find it's way into somthing.
Brian
Post Edited (Brian Beckius) : 8/7/2008 5:04:51 AM GMT
1) Is it NC'ed or are you a master machinist?
2) The two bottom bogie shafts ride in slots. Are they spring-loaded?
3) Where did you get your molded rubber tread from? Sometimes that's the toughest thing to get/make.
Keep up the great work!
Eric
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·"If you build it, they will come."
I do not know if the Mattrack configuration is patented. Some of us have used a toy version (avaliable on some Radio Shack toy trucks) on the Boe-Bot (do a search on the forums). Real Mattracks are fitted on trucks and other equipment. See their site here - http://www.mattracks.com/·Be sure to look at some of the videos!
I am with erco, your track set-up looks really well made. The suspension that erco speaks of is a good feature - I think. The Mattracks on the toy have no suspension themselves but are mounted with a suspension system. This allows up and down movement and some rotation. The real Mattracks are all about suspension. You will see on the website.
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Whit+
"We keep moving forward, opening new doors, and doing new things, because we're curious and curiosity keeps leading us down new paths." - Walt Disney
Post Edited (Whit) : 8/7/2008 3:46:09 PM GMT
Brian
·I have a CNC mill, the bottom 2 shafts are used to tighten track and are stationary once they are set. The tracks came from a most unlikely source :-), I am working on this system for another project, but I believe it could be scaled down to fit the wheel/motor combo.
Brian
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Thank's Brian
·"Imagination is more important than knowledge..." ·· Albert Einstein
www.PropelX.com
Post Edited (Brian Beckius) : 8/15/2008 3:16:58 AM GMT
Your right ,the track will slip off sidways . They where suppose to have only a 1" wide drive strip in the center ,not all the way across. I'm trying to get the supplier to remake them the right way.
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Thank's Brian
·"Imagination is more important than knowledge..." ·· Albert Einstein
www.PropelX.com
Here is V1(really v2) of the motor/wheel tracks . Tell me what you think, Please! :- )
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Thank's Brian
·"Imagination is more important than knowledge..." ·· Albert Einstein
www.PropelX.com
Post Edited (Brian Beckius) : 9/4/2008 3:43:33 AM GMT
Nice work, but the drive sprocket is too narrow and concentrates the vehicle load only in the center of the tread width. In other words your design is not making use of the full load bearing capability of the tread width.
Hope this helps.
Regards,
TCIII
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If you are going to send·a Robot·to save the world, you·better make sure it likes it the way it is!
The little drive was going to be used for the top wheel on a triangle drive, the wheel/motor would sit to low to the ground with that small of drive. I was thinking of doing a just a straight track and that would make the drive wheel adout 5" in daimeter(and wider) the wheels would be about 7 inches center to center. That would work good for a 2 motor crawler type robot with skid steer. This is really up to you guys what you would like to see ,the cheaper way will be to go with the straight crawler,the most expensive would be the mattrack's design.
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Thank's Brian
·"Imagination is more important than knowledge..." ·· Albert Einstein
www.PropelX.com
Great design. I didn't realize when I first looked at the picture that the drive lugs are separate. Great way to keep costs down and add flexibility.
I have a tracked robot and one of the difficulties is turning. With 17 inches on the ground, that's going to take a lot of force to turn the robot and that same force tries to rip the track off the wheels. I used a Delrin guide on the bottom to reduce the surface contact on flat surfaces.·· I hasn't reduced the ability of the robot to climb or move.
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Yikes, not sure what happened there.· Must have leaned on the return key?
Daryl
Post Edited (DJSandberg) : 9/8/2008 12:13:07 AM GMT