Looking for a person to finish a design a 4-axis stepper controller with Raspberry PI 3. This is used to control a large stepper with typical current >1A per axis. A separate drive (commercially purchased or designed one) for stepper can be used. The function for stepper will be bi-directional continuous move at selected speed, bi-directional fixed step movement as fine as 1 step/microstep.
A blue tooth based remote controller (continuous job, step, speed selection, buttons) also need to be designed in such way that it will be able to be power up with 2 AA battery for 6+ month with occasional use per day.
The current selection is oriental motor's open frame drive board. So the RPI3 will only need to generate pulse train. But the final selection of the motor and drive will be determined with contractor and mechanical requirement.
specification all purchased parts and its vendor
all design for any designed parts
any code used
help constructing a prototyping
remote controller design and code
power consumption estimate on remote controller
range estimate on remote controller