BEZICRON

next I assemble a dual module to test the carryover mechanism. I worked smoothly as the 20mm geared stepper is a overkill for this purpose. The units motor homes to zero using the hall sensor and then runs clockwise to change the digits. After every one turn it carryovers to the tens module using a carryover gear mechanism.

I built a single module to test the concept. The module was driven by a geared 15mm stepper motor which was controlled by a cnc shield. I quickly realized that the torque need to turn the cams and followers was much more than I anticipated. The 15mm motor ran very hot and overworked. So in the next iteration I used 20mm geared stepper motors