Percussive Maintenance

Robot Facts

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Percussive Maintenance is a UK beetleweight robot (where it fights under the name 'Percussive Maintenance XL') that first competed in 2023. It is due to debut at NHRL during the June 22nd 2024 event. It is an axebot that uses kiwi drive, a form of holonomic drive system where 3 omni wheels are arranged in a Y configuration.

Builder/Driver	Thomas Yau
Weight Class	3lb
Body Material	8mm/4mm HDPE
Armour	TPU
Weapon	Axe - Hardox 400 3mm-5mm head, twin 4mm HDPE arm
Weapon Drive	Overlander 2830 1300kv motor, 14:1 28mm gearbox. MOD3 HDPE gears from motor output to weapon arm.
Drive	GEPRC SpeedX2 1804 2450kv motor, Rotalink 19:1 gearbox
Power	GNB 650mah 4S LiPo

Version 1

Version 1 used BBB brushed motors for drive and featured a belt-driven axe using an Owobotics 1806 brushless motor/gearbox. This version had issues with self-righting, as the belt would frequently slip under high torque loads.

Version 2

Version 2 was built in November 2023, and was a complete redesign. The drive motors were replaced with GEPRC SpeedX2 1804 2450kv motors coupled with Rotalink 19:1 gearboxes, modded with all-steel planetary gears. The weapon motor was upgraded to an Overlander 2836 1120kv motor coupled with a 16:1 28mm gearbox. The robot also became significantly smaller.

Despite the upgraded weapon motor, this version still struggled to self-right. In December 2024, the belt-driven system was replaced with MOD2 8mm HDPE gears, on a 14:10 reduction, which finally allowed the robot to self-right. This was further increased to MOD3 12mm HDPE gears in January 2024 to further increase the power output.

Version 2.1

In late March and April 2024, the robot underwent some upgrades to prepare it for competition in the US, where the beetleweight class is 3lb instead of 1.5kg in the UK. The weapon motor was replaced with an Overlander 2830 1300kv motor coupled with a 14:1 28mm gearbox, which saved some weight and increased the speed of the axe. Armour configurations were adjusted to further cut weight and bring it under 3lb. In addition, the weapon ESC was replaced with an AM32 ESC, to further assist with self-righting.

Statistics

Info

• Rank: #705 in 3lb.
• Last 5 fights: LL
• Current streak: L2 (1 KOs/KO'd)
• Longest winning streak: 0 (0 KOs)
• Longest losing streak: 2 (1 KO'd)
• Avg fight time (seconds): 157.0

Record

Year	Events	Fights	W	L	%	KOs	KO'd
2018-19
2020
2021
2022
2023
2024	1	2	0	2	0.000	0	1
All-Time	1	2	0	2	0.000	0	1

Events

Date	Fought as	Reached	Place	Fights	W	L	KOs	KO'd
June 22, 2024	Percussive Maintenance	Qualifiers Rd. 2		2	0	2	0	1

Opponents

Opponent	Fights	W	L	KOs	KO'd	Last Meeting
Codename Pinto	1	0	1	0	1	June 22, 2024
Mr. Scrubbles	1	0	1	0	0	June 22, 2024

Click "Expand" to see this table.

Full Fight History

Date	Opponent	Round	Result	By	Points	Fight Length (s)	Video
June 22, 2024	Mr. Scrubbles	Qualifiers Rd. 1	Loss	Forfeit	-1.00
June 22, 2024	Codename Pinto	Qualifiers Rd. 2	Loss	KO	-1.14	157	https://brettzone.nhrl.io/brettZone/fightReview.php?gameID=EX-3f5f3552c8544a7a&tournamentID=nhrl_jun24_3lb

* Forfeits before the 2024 season are not counted in a bot's W-L record. Forfeits from 2024 and on are counted in a bot's W-L record.

For more information on how points are calculated for rankings, click here.

Click "Expand" to see this table.

Select Fights

Video links Coming Soon!

Gallery

Images coming soon!