# Overclocked - a Shuffling Axebot **URL:** https://forum.bristolbotbuilders.com/t/overclocked-a-shuffling-axebot/298 **Category:** Bot Builds & Designs **Tags:** build-log, finished-bot, beetleweight-1-5kg **Created:** [29 June 2024 16:19 UTC](https://forum.bristolbotbuilders.com/t/overclocked-a-shuffling-axebot/298 "2024-06-29T16:19:20Z") **Posts on this page:** 1 **Showing post:** 22
### Author: ![T\_Y](https://forum.bristolbotbuilders.com/user_avatar/forum.bristolbotbuilders.com/t_y/32/7116_2.png) [@T\_Y](https://forum.bristolbotbuilders.com/u/T_Y) #### Post date: [13 March 2025 17:20 UTC](https://forum.bristolbotbuilders.com/t/overclocked-a-shuffling-axebot/298/22 "2025-03-13T17:20:08Z")
Been a busy few weeks for me as I get Overclocked V2.1 ready for Robodojo this weekend! First things first, a new gearbox arrived that is 19:1 as opposed to the current 14:1 gearbox. It also ended up being significantly smaller (and actually 42mm), which facilitated making the bot 16mm narrower. ![20250228_132800](https://forum.bristolbotbuilders.com/uploads/default/original/2X/f/ffaa228e2c885741ce0a63842ebe93530ca0e9d5.jpeg) The battery has been increased in size to a 720mah 4S LiHV battery (thanks Rob!), to make room for this the cutout in the back of the chassis has been filled in, so gone is the U-shaped chassis for a plain box. The fork mounts have also been beefed up, with the tabs going int othe front plate being double widge should offer a bit more resilience. But the thing that’s been occupying most of my time on this rebuild are the legs. In order to solve the melting issue, I decided to try machined legs out of HDPE. ![20250225_125332](https://forum.bristolbotbuilders.com/uploads/default/original/2X/5/534020dc1a240ebe1e3c6e737af05cb4c2367f10.jpeg) These look really good, but it turns out that 2 part PU really doesn’t like to stick to HDPE. I went through several iterations of leg designs, even drilling in plane after the CNC was done so the PU would flow around the HDPE to create a mechanical connection instead of just relying on adhesion, but nothing kept the PU on the legs, expecially when I tried to drive. I ended up reverting back to PLA-ST legs (but with improvements to the PU/leg interface to include a mechanical connection now), with the addition of 0.5mm PTFE shims in between each leg. This should give the legs a smoother friction surface to rub against and space them out a bit to further reduce the friction surface. Hopefully that does the trick. ![20250312_204552](https://forum.bristolbotbuilders.com/uploads/default/original/2X/b/bcce530c62a82ec2719e19f139332ce5ff2ad0a5.jpeg) ![20250312_204602](https://forum.bristolbotbuilders.com/uploads/default/original/2X/3/3a266c5969c75208314a831f2eb7266dfb7cf4ae.jpeg) --- _[View the full topic](https://forum.bristolbotbuilders.com/t/overclocked-a-shuffling-axebot/298)._