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Construction Equipment If it digs, pushes, hauls dirt "off road" post it here. |
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#121
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Re: MPE – 24M Motor Grader Build
Great build !!!!! for joysticks you could use some of these 4 axis ones from servo city. http://www.servocity.com/html/4_function_joystick.html
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#122
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Re: MPE – 24M Motor Grader Build
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#123
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Re: MPE – 24M Motor Grader Build
Thanks for the update, had me worried you were buried in a pile of swarf.
JensR, Ive been working on a prototype, ive got 4-axis off an old controller to a PC front end then sent back to control 4 servos and 16 latched digital outputs. Am still having some comms dramas but after some reading theres a memory leak in the USB driver but should be able to find a work around. With this scheme it would be fairly easy to have an ardunio on each end and an xbee for the TX/RX, and either no PC or a laptop for monitoring & feedback. Due to my student budget im waiting to pickup that mutiplexing IC and the xbees, but ive got the bare bones going for now. |
#124
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Re: MPE – 24M Motor Grader Build
Hi footprint!
A servo-multiplexing IC only costs a few quid at hobbytronics?! Which ones are you using? Maybe they are higher performance? I've been mildly looking for some with higher resolution. The xbees are more expensive devices that the multplexer, but are IMO a bit overkill for this (and similar) applications in terms of range. However, they are a tried and tested solution. NRF24L01 is a cheap alternative, but you have to come up with your own protocol... |
#125
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Re: MPE – 24M Motor Grader Build
Yes same ones and only a a few quid but due to cutbacks at work all us apprentices got the boot, so for now ive ~60 a week to live on so a few quid is a few cans of soup. I am thinking of selling my RC-Heli's if anyones interested.
The xbees are still on my plans as in the future i can use the ADC & D I/O for other projects, range is more optimal and im already using mod 232, 9600,8,1 so can just "bind" and i should be away. Still the next few weeks are packed solid with Tec so be a few weeks before i can concentrate on it in the meantime am working on the frontend and a better comms standard for better flexibility but as it stands now on the breadboard, without the demux IC, 6 servos and 16 latched D/O''s but for things like pumps you could always build a few H-bridges to save the channels. Anyway i'll start a new thread soon, save clogging up MPE's AWESOME! build, subtle hint - We need more pictures I did get a little sidetracked playing with the adrunio the other day, http://youtu.be/_D5MnshZl0Q Last edited by footprint; 02-14-2012 at 10:41 PM. |
#126
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Re: MPE – 24M Motor Grader Build
Hey Guys... Not much to show right now in way of pictures. Life has a way of getting in the way of doing my fun projects and CAD drawings take a bit of time to finish.
Here is a post of the internal chain and gears on the tandem drive. One overlook when I was designing this part, I failed to compensate for chain slack. I am not going to change the model any because of its complexity. Instead I will add a half link to the chain. This is going to be a little more then I want but it should work out Ok. |
#127
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#128
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Re: MPE – 24M Motor Grader Build
Neil - Not a bad idea to get this thing moving while I work the controls out.
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#129
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JensR - Thanks for the great compliment! As far as the color goes... I was waiting for someone to call me on that! Actually the color in my CAD program is CAT correct but between doing screen shots and Photobucket the color morphs to this bright yellow that you see in my post. I haven’t taken the time to investigate why that is. |
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#131
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Re: MPE – 24M Motor Grader Build
Found some time to work on the rear steps...
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#132
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Re: MPE – 24M Motor Grader Build
Hand Tapping the ruins for M1.4 threads....
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#133
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#134
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#136
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#137
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#138
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#139
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#140
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Re: MPE – 24M Motor Grader Build
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