In my project I've been using galvo scanners for rotating small mirrors but they seem like an overkill at this point for several reasons:
1) Even though I use the slowest and smallest scanners out there, they are still over 100 grams each, in a device where every gram matters,
on top of that, their drivers are rather large (8cm x 6cm) and need special dual rail +-12V power supplies and +-5V DAC circuits to run. These all require space of their own and I need everything take up as much little space as possible.
2) While they can achieve the rotation speeds I need they seem to exceed it. The cons of using galvos which is space for all the electronics seems to outweight the pro of the high speeds which aren't used to the fullest anyway.
Since steppers just need one 3.3, 5 or 12V PSU and one stepper driver I thought I'd give them a try.
The smallest steppers I am aware of which are readily available are NEMA 14, which is huge for this.
The requirements are simple:
1) torque is extremely low as a small 10x10mm 1mm thick mirror is rotated which is glued onto it.
2) acceleration and rotation speeds are important and demanding though: 50 ms for a 5 degree rotation
I've found a stepper but the rotation speed is abysmal for this. The 28BYJ-48
I guess my questions are these two:
1) Can small enough steppers meet this criteria (low torque but high speed requirement) at all?Bigger motors seem to achieve the desired result https://youtu.be/KgPyR0Rg3FQ?t=1m17s
2) which stepper(s) should I check.
3) can they not make those loud sqeaky noises like in CNCs and 3d printers?
https://youtu.be/pyFZKc356eQ?t=2m1s
1) Even though I use the slowest and smallest scanners out there, they are still over 100 grams each, in a device where every gram matters,
on top of that, their drivers are rather large (8cm x 6cm) and need special dual rail +-12V power supplies and +-5V DAC circuits to run. These all require space of their own and I need everything take up as much little space as possible.
2) While they can achieve the rotation speeds I need they seem to exceed it. The cons of using galvos which is space for all the electronics seems to outweight the pro of the high speeds which aren't used to the fullest anyway.
Since steppers just need one 3.3, 5 or 12V PSU and one stepper driver I thought I'd give them a try.
The smallest steppers I am aware of which are readily available are NEMA 14, which is huge for this.
The requirements are simple:
1) torque is extremely low as a small 10x10mm 1mm thick mirror is rotated which is glued onto it.
2) acceleration and rotation speeds are important and demanding though: 50 ms for a 5 degree rotation
I've found a stepper but the rotation speed is abysmal for this. The 28BYJ-48
I guess my questions are these two:
1) Can small enough steppers meet this criteria (low torque but high speed requirement) at all?Bigger motors seem to achieve the desired result https://youtu.be/KgPyR0Rg3FQ?t=1m17s
2) which stepper(s) should I check.
3) can they not make those loud sqeaky noises like in CNCs and 3d printers?
https://youtu.be/pyFZKc356eQ?t=2m1s
