I am upgrading an "Instron" machine which tests mechanical qualities of materials. i.e - Tenslie, Compression and fatigue tests.
Instron : Materials Testing Machines for Tensile, Fatigue, Impact & Hardness Testing
for that i need really slow speeds from the motor. for example - if the tesion is applied at a rate of 0.5 Cm/Min - and i use a 1.8 deg. step motor - i need the pulses frequency to be 0.2 pulses/sec.
I can disconnect the external oscillator (20 Mhz) and use the "8 user-selectable frequencies, from 31 kHz to 8 MHz" (from the data sheet)
this is the motor i use:
**broken link removed**
Thanks!