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

Re: MPE – 24M Motor Grader Build
 

Not bad, these look really sturdy. The fourth function is only on-off, though - but I guess one could modify those sticks - still cheaper than buying a full-scale industrial joysticks and more sturdy than the converted gaming joysticks I use.

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.

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...

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

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.

http://i516.photobucket.com/albums/u...r/1658d8cf.jpg

Re: MPE – 24M Motor Grader Build
 

tc1cat - Yes you are so right with the paint. But I am not really concerned because I have experience painting small assemblies. The tandems rotation is not an issue for paint. The rear frame including the body will be painted assembled. The cab and neck will also be painted once assembled. Problems areas could arise from the front axle and blade. My thoughts are to have these parts, and basically all painted parts assemblies before paint. This could all change once this thing is complete, and if it does I can deal with it then. I will use an airbrush when I paint this model.

Re: MPE – 24M Motor Grader Build
 

Neil - Not a bad idea to get this thing moving while I work the controls out.

Re: MPE – 24M Motor Grader Build
 

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.

Re: MPE – 24M Motor Grader Build
 

Footprint - sorry about your job! I look forward to your thread. It will be great to see what you have going in way of electronics.

Re: MPE – 24M Motor Grader Build
 

Found some time to work on the rear steps...
http://i516.photobucket.com/albums/u...r/36dad46d.jpg

Re: MPE – 24M Motor Grader Build
 

Hand Tapping the ruins for M1.4 threads....
http://i516.photobucket.com/albums/u...r/4df2f01a.jpg

Re: MPE – 24M Motor Grader Build
 

Re: MPE – 24M Motor Grader Build
 

Re: MPE – 24M Motor Grader Build
 

http://i516.photobucket.com/albums/u...r/dd8f4ced.jpg
http://i516.photobucket.com/albums/u...r/558fc6db.jpg

Re: MPE – 24M Motor Grader Build
 

Re: MPE – 24M Motor Grader Build
 

Re: MPE – 24M Motor Grader Build
 

Re: MPE – 24M Motor Grader Build
 

Re: MPE – 24M Motor Grader Build
 

Re: MPE – 24M Motor Grader Build
 

Re: MPE – 24M Motor Grader Build
 

OMG! Crazy details! :eek:

Re: MPE – 24M Motor Grader Build
 

Very nice work!!!

Stefan

Re: MPE – 24M Motor Grader Build
 

Wow, that bogie should be view-able without any structure above, hiding all those nice details!
Dan

Re: MPE – 24M Motor Grader Build
 

Hi

Thats great work to a very highstandard.
thanks for posting pic gives something to work to.

Regards

Mark

Re: MPE – 24M Motor Grader Build
 

Steps completed...
http://i516.photobucket.com/albums/u...r/7f07d70c.jpg

Re: MPE – 24M Motor Grader Build
 

That is some excellent machine work there it is very nice keep up the good work. Ed

Re: MPE – 24M Motor Grader Build
 

Thanks guys for all you compliments.
Hey Stefan... when are you going to post some more of your outstanding work on that G990?

Here are a few more pictures of some of the details of the wheel hubs and tandem body parts.

Rear axle top view...
http://i516.photobucket.com/albums/u...r/a2fc7d1c.jpg

Re: MPE – 24M Motor Grader Build
 

Rear axle with bearing pressed on...
http://i516.photobucket.com/albums/u...r/a03dec61.jpg

Re: MPE – 24M Motor Grader Build
 

Hub with bearing
http://i516.photobucket.com/albums/u...r/cd4a0c3e.jpg

Both parts press together
http://i516.photobucket.com/albums/u...r/9661aae5.jpg

http://i516.photobucket.com/albums/u...r/43f49ac5.jpg

Re: MPE – 24M Motor Grader Build
 

All four assemblies
http://i516.photobucket.com/albums/u...r/2bdb38e8.jpg

Re: MPE – 24M Motor Grader Build
 

Assembled on frame
http://i516.photobucket.com/albums/u...r/c3472a20.jpg

http://i516.photobucket.com/albums/u...r/950daf0f.jpg

Re: MPE – 24M Motor Grader Build
 

Re: MPE – 24M Motor Grader Build
 

It just looks amazing!

Re: MPE – 24M Motor Grader Build
 

:eek:

WOW!

Simply amazing....

Cheers,
AP

Re: MPE – 24M Motor Grader Build
 

You gotta love all those bolts.

Re: MPE – 24M Motor Grader Build
 

Patience! :D:D I do have something in the pipeline... but hardly anything so excellent as your work ;).

Stefan

Re: MPE – 24M Motor Grader Build
 

WOW you have some crazy skills!! Those hubs and steps are sweet!!! Keep up the great work!!

Re: MPE – 24M Motor Grader Build
 

Very nice work-Great details!!

Re: MPE – 24M Motor Grader Build
 

Just sick! just sick!:D

Where did U get that big 24M diecast?