overture
Newbie level 5
udn2917eb cnc
Haven't done anything yet. Just had been thinking if this is possible. An existing system is being driven by a stepper of the following characterstics :
Type: 4-phases / 96-pole / HB type stepping motor
Drive Voltage : 42 VDC ± 5% (The voltage applied to the driver)
Coil resistance : 10 W ± 10% (at 25° C per 1 phase
Connection : Bipolar
Excitation mode : 2-2 phase, 1-2 phase, W1-2 phase constant current drive
Minimum step : 1/720 inch / step (2-2 phase drive)
The motor is being driven by an Allegro driver IC UDN2917EB
(data shett for the IC can be seen here h**p://www.datasheetcatalog.com/datasheets_pdf/U/D/N/2/UDN2917EB.shtml
It does microstepping depending on the reference voltage provided on pins 25 and 44. Thus the linear resolution is achived upto 1/720 inch/step.
So far so good. But I want to modify the whole mechanical system using a larger stepper motor of higher torque driving a different leadscrew and slide assembly than the original. Somewhere around 6 Amps. Can the output from UDN2917EB used directly to drive another set of stepper drivers?
Also, another problem shall arise when I'll change the mechanical portion. I'll be driving a leadscrew. The new leadscrew has a different lead/inch. But I still need to maintain that 1/720 inch/step linear resolution. Can the ratio be varied electronically so that I can adjust the final value by trial and error?
Haven't done anything yet. Just had been thinking if this is possible. An existing system is being driven by a stepper of the following characterstics :
Type: 4-phases / 96-pole / HB type stepping motor
Drive Voltage : 42 VDC ± 5% (The voltage applied to the driver)
Coil resistance : 10 W ± 10% (at 25° C per 1 phase
Connection : Bipolar
Excitation mode : 2-2 phase, 1-2 phase, W1-2 phase constant current drive
Minimum step : 1/720 inch / step (2-2 phase drive)
The motor is being driven by an Allegro driver IC UDN2917EB
(data shett for the IC can be seen here h**p://www.datasheetcatalog.com/datasheets_pdf/U/D/N/2/UDN2917EB.shtml
It does microstepping depending on the reference voltage provided on pins 25 and 44. Thus the linear resolution is achived upto 1/720 inch/step.
So far so good. But I want to modify the whole mechanical system using a larger stepper motor of higher torque driving a different leadscrew and slide assembly than the original. Somewhere around 6 Amps. Can the output from UDN2917EB used directly to drive another set of stepper drivers?
Also, another problem shall arise when I'll change the mechanical portion. I'll be driving a leadscrew. The new leadscrew has a different lead/inch. But I still need to maintain that 1/720 inch/step linear resolution. Can the ratio be varied electronically so that I can adjust the final value by trial and error?