7.5degree is 48 steps per rotation (full step)
This directly translates it to the accuracy of the machine
Presuming a standard belt driven axis using 2mm belt pitch and 8 tooth pulley and 1/16th micro stepping
1.8 steppers, 200 steps/mm gives you a theoretical resolution of 5micron
7.5 steppers, 48 steps/mm gives you a theoretical resolution of 20.82micron
On m5 leadscrews this translates to
1.8 steppers, 4000 steps/mm ie 0.25Micron
7.5 steppers, 960 steps/mm ie 1.04166666Micron
I don't think you will ever notice the difference.. Please try it
This directly translates it to the accuracy of the machine
Presuming a standard belt driven axis using 2mm belt pitch and 8 tooth pulley and 1/16th micro stepping
1.8 steppers, 200 steps/mm gives you a theoretical resolution of 5micron
7.5 steppers, 48 steps/mm gives you a theoretical resolution of 20.82micron
On m5 leadscrews this translates to
1.8 steppers, 4000 steps/mm ie 0.25Micron
7.5 steppers, 960 steps/mm ie 1.04166666Micron
I don't think you will ever notice the difference.. Please try it