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Steering mount for Tatra OpenRC Trail Truck

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Creation quality: 5.0/5 (1 vote)
Evaluation of members on the printability, utility, level of detail, etc.

  • 544 views
  • 2 likes
  • 6 downloads

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3D design format
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  • Frame_Support_3.STL
  • Steering_Arm_1_5_27.STL
  • servo_tatra.zip
    • config.h
    • main.c
  • steering_v2.STL

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Publication date 2023-03-18 at 08:15
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Published to Thingiverse on: 2020-09-30 at 16:30
Design number 1120958

3D printer file info

3D model description

Low profile servos I used: https://www.aliexpress.com/item/33041455890.html, Attiny is calculating servo signal for second axle (less rotation)
Steering arms are M3 stainless, but will be switched to M4 stainless, steering horns may also change, as I use only 30% of possible servo rotation --> bad steering force

I didn't pay much attention to printability during design, so support is needed when printing...

Update Nov 7 2020:
- added C-file for ATtiny and sketch how to connect (no schematic available, I put everything together on a perfboard
- added modified (shorter) steering arms

Update April 6th 2021:
- modified frame support 3 added --> needed 2x instead of original frame support 2 and 3

there are a few modifications (edge sanding + 2 screws on the very front axle) necessary to give the steering more room (pics added)

new M4 ball joints: (needed some sanding, see pics)
https://www.aliexpress.com/item/4001061838272.html

External BEC is mandatory, I fried my (cheap) ESC because the servos draw a lot of current!

External BEC I used:
https://www.ebay.de/itm/DC-DC-Buck-Converter-200W-4V-40V-8A-Step-Down-Voltage-Power-Module-XL4016/162716874047?hash=item25e2ae753f:g:C7MAAOSwUwFZ5vb8

For turn indicator you can use something like this:
https://www.ebay.de/itm/Orange-Blinkende-LED-5mm-Blinkt-Flash-1-5Hz-Diffus-E6-6/303730671714?hash=item46b7c24062:g:EgUAAOSwLFJfirta

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