I’m planning a project to build a remote controller lawn mower, relatively small scale PoC first to test & learn followed by a larger version later.
Small scale will be a basic chassis setup in a skid-steer configuration with 2 drive wheels at the back and 2 idle wheels at front (with future goals of changing to tracks); current wheels I’ve found are 120mm dia and total mass estimate will be around 15kg. It will be controlled by an r/c tx/rx feeding PMM into a micro controller (Either Arduino or ESP8266…havn’t decided yet) which in turn signals a motor controller to feed power to either drive wheel. It needs to be capable of variable speed and run in forward & reverse.
Based on reading other people’s similar project I think the overall concept will work but they often used 2nd hand wheelchair motors which I’ve not been able to source yet in Australia so looking for something more off the shelf. I’m good with micro controllers & programming but new to motors & robotics in general.
2 x 25Dx52L HP, 34:1 gear motors attaching directly to the drive wheels.
1 x Sabertooth 2x5A motor driver. This brand seems very popular for this type of project but also pretty expensive. Does Pololu have something else comparable? Would this still work given the motors have up to 5.6A current?
1 x 12V 15AH deep cycle AGM battery
I’ve been using this guy:
Which implies this may work but I have little grasp of the underlying formulas involved.
Does this motor/driver/battery combination sound generally sane for this type of build or am I way off somewhere?
Thanks for reading and advice.