Build an Excavator from Scratch

[pufferfish]

thank you.

Next thing to improve is the motor mount of the rotary drive.

first attempt. principally working but too weak for the complete weight of the upper construct.




The motor is strong enough, so i need just a better adjustment technic and a more stable mount.

First part is the combined clamping and movement thing

a plan


and the real thing










more to come....

[pufferfish]

the wedge bar is done. cutted from a stainless steel bar.



fits well

[pufferfish]

Still working on the rotary drive.
Today the outer clamps and their flanges to the platform were built.

Befroe that, the old flanges have to remove from the platform. i've used the little 35 mm cuttings discs from proxxon.



The outer clamps get some recesses for the weldable flanges with m4 threads.



After this a first setup of the mechanism happens





works fine but needs some more details before completed....

[pufferfish]

Last part of the rotary drive.

clamp screws with stainless bolts to avoid damaged threads


adjustment with a simple block on the maximum position and an offset of 1/10 mm with a feeler gauge


clamps very well, no more wobble even if i simulate lateral forces like when the bucket is digging

[pufferfish]

The work on the cabin begins.

Some angle-guides...


for this little micro belt sander,...


together with a 90