Peter Wallers Robot Ramblings

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peterwaller
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Re: Peter Wallers Robot Ramblings

Postby peterwaller » Thu Aug 10, 2017 2:28 pm

I have been looking at ways to improve the design of my tracks.
The existing tracks have a flexible 3D printed insert to stop them stretching too much and provide the drive pins but there is quite a lot of friction between the rubber and the side walls of the wheels and also small bit of rubber from around the drive pins shown below gets into the gearboxes.
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So I have changed the design so only the 3D part runs on the wheels.
Here is the insert, the insert in the mold and the finished track.
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Below is a close up of the insert showing how the rubber is molded through the three holes into the hollow drive pin area to ensure the tracks are held on firmly.
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peterwaller
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Re: Peter Wallers Robot Ramblings

Postby peterwaller » Fri Aug 11, 2017 12:41 pm

Here is the final track on a test setup with the new drive wheels.
https://youtu.be/u8IMARUlHO0

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peterwaller
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Re: Peter Wallers Robot Ramblings

Postby peterwaller » Sat Sep 09, 2017 10:19 am

I have been looking at the firmware in my controller and it appears I wasn't using the 16 bit timer anymore so as it can be configured as an 8 bit PWM timer I could redesign the controller and do away with the extra nand gates I had added to get it to work MX612 drivers.
I also decided to mount the tiny orange rx, the motors and power switch directly to the board to make a complete module that just needs a battery connecting (plus servo if required).
The board which came out at 38 x 20 mm is being made by Ragworm and I think I have redone the software ready to load only time will tell if it all works out.

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peterwaller
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Re: Peter Wallers Robot Ramblings

Postby peterwaller » Sat Sep 16, 2017 6:11 pm

The boards arrived yesterday and all appears to function correctly.
Here is the finished unit which comes out at 27.3 gms.
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Hogi
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Re: Peter Wallers Robot Ramblings

Postby Hogi » Sun Sep 17, 2017 5:36 am

This looks very good. Should save you a lot of room inside the robot for weapons and things. :-)
Featherweight under construction.

Antweight to build list: 4Wd lifter, new clusterbot, secret project, walker of some description.

Team Hectic.

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peterwaller
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Re: Peter Wallers Robot Ramblings

Postby peterwaller » Mon Sep 18, 2017 10:29 am

Cheers Dan,
Here is the finished unit with the second cover in place it comes in at 28.6 gms.
Image
I left the Rx exposed so you can see the lights for binding and receiver error codes.

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Re: Peter Wallers Robot Ramblings

Postby peterwaller » Mon Sep 18, 2017 11:18 am

It just dawned on me that I could dispense with the flying lead on the battery connector.
Image


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