April 12, 2020
Description
Grab and Lift Robot. This is a 150g combat robot. Very simple build that doesn't require many extra tools.
I'm attaching the .STEP file as well for those who want to edit and modify. This is designed to fight nondestructive robots. Flippers, hammers, wedges, etc. You will need to modify a bit for full combat and add 0.5mm titanium wedges for example.
Assembly tricks:
You can use a paper clip to attach the flipper to the servo arm and cut off the excess after its bent. However tapping the servo arm to accept an M2 bolt is ideal.
The lego hub has tolerances to printed easily on my printer and be a snug fit, but attaching a tighter tolerance version in case you need it.
I use #3 plastite for the top plate and wedge
Reference my PDF for what needs to be clearance fit and what needs to be a thread.
BOM
Links here: https://docs.google.com/spreadsheets/d/1HqPwgTid8flR8bDFijHdza18m8T-cTUwRuQyM6YLlmM/edit#gid=1353061001
Hardware
Tools
Electronics
Flipper Servo: KST DS315MG or KST DS215MG
Drive Motors: N20 Micro Gearmotor 12v 1000rpm
ESC: Malenki Nano
Battery: Nano-tech 300mah 2S Lipo Pack
You can use other servos like the Corona DS929HV for a cheaper alternative. However, you will need to play with the linkages to get full travel as they often come with a shorter servo arm.
You can buy these wheels to save weight if needed. Although the lego wheels work great and are much cheaper
SC-2110p ProComp (http://www.132slotcar.us/store/product_info.php?products_id=4523)
License:
Creative Commons - Attribution - Non-Commercial - Share Alike
emancarrillo
