Data Sheet

www.dimensionengineering.com/products/Sabertooth2x32
switch for the signal being fed into S1. If only a single direction is needed, only S1 and S2 need to be
connected.
Speed ramping
In all analog modes except Single Direction, an analog signal sent to the A1 auxiliary input controls the
ramp rate for both channels of the motor driver. This is useful to make gentle motions or limit peak
currents due to acceleration. For example, a ride-on electric skateboard that started at full power
immediately will throw its rider off, but one with a several second ramp rate is easy to ride. If this input
is not connected, the input’s internal pull-down will automatically set the fastest response. If adjustable
ramping is not desired, leave the A1 input disconnected. The ramp rate can also be set using the
DEScribe PC software.
Maximum speed
In all analog modes except Single Direction Mode, a signal sent to the A2 auxiliary input sets the
maximum speed for both motor outputs. This can be used for fine control, because as the maximum
speed scales down, so do all other inputs. You might want to reduce the maximum speed for very
precise control while inspecting a specimen, then turn the speed all the way back up to jog over to the
next. If this input is not connected, the input’s internal pull-down will automatically set the fastest
speed, so if adjustable max speed is not desired, you should leave the A2 input disconnected.
Other analog control mode options, such as automatic calibration, are available by using the DEScribe PC
software. You can also use DEScribe to create custom analog control modes.