Newbie Scratch Build - D575A Dozer

[Jared]

Dang, you're off to an impressive start for a first build. Those track links are beautiful!

Frizzen, if you click on the pictures it'll open a bigger one.

[Hemi1966]

Great start Rob
I had to check how big this thing really is, and it's huge

Also very well said about the amount of work you have to do before you start making any parts.

[Originalrob]

I worked out the larger pics hot link



Half way through the track links for one side today.

I have also been trying to work out the drive train

printed a motor mount as a prototype to hold the 2 motors at the right angle to the drive shafts. I put the motors on an angle pointing at the axle so I would have to add in another set of gears before it turned 90 degrees. I have a 1:1 mitre gear set to get it to the sprocket.





I am actually surprised how strong this plastic is (ABS) and have changed my mind that I might as well leave it in and see how it goes. This also led me to try the speed of the motors and sprocket as a test. The motors are rated at 24v and run at 41 rpm. aAfter testing them on a 9 v battery ( 16 rpm) I have decide that I will have to somehow get a 2:1 ratio before it get to the sprocket. I am thinking 20 RPM would be an ideal speed - has anyone had any experience in this?

thanks

Rob