BC2D15PotStepper Firmware
The BC2D15PotStepper firmware is designed to allow the BC2D15 controller to operate two stepper motors independently of each other. It permits use of a single potentiometer (user provided, according to the desired top speed of the motors) to use as a rate control for the motors.
The following table summarizes the currently released BC2D15 bipolar stepper motor control product key capabilities. You will first want to review the calculating motor current faq in order to determine the current requirements for your motor.
| Product | Bipolar | Current/Winding with 2 motors | Motor Voltages |
| BC2D15 | x | 0.2-1.5 Amp | up to 34 |
The BC2D15PotStepper key capabilities may be summarized as follows:
- Up to two stepper motors may be independently controlled at one time.
- A single potentiometer (user provided) may be used to control the stepping rates of the motors.
- Limit switches may be used to automatically request motion stop of either motor in either direction.
- Rates of 1 to 44,801 microsteps per second are supported.
- Step rates are changed by linearly ramping the rates; the rate of change is independently programmed for each motor, and can be from 1 to 44,801 microsteps per second per second.
- All motor coordinates and rates are expressed in programmable microstep units of 1/16 to one full step. Once the base step size is selected, changing stepping modes between half, full and micro does not change any other value other than which winding pairs may be driven at the same time.
- Motor coordinates are maintained as 32 bit signed values, and thus have a range of –2,147,483,647 through +2,147,483,647.
- Both GoTo and Slew actions are fully supported.
- A TTL "busy" signal is available, which can be used to see if the motors are still moving. Note that this information is also available from the serial communications subsystem.
- Simple control of the motors may be done by switch closure: i.e., each motor can be told to slew left or right, or to stop by simply grounding some input lines. Similarly, the rate of motion can be controlled via a user-provided potentiometer.
- Complete control of the motors, including total monitoring of current conditions, is available through the 2400 or 9600 baud serial or USB connection (depending on the board that you order).
- You have full control over the current which is sent to the windings, both when the motors are in motion and when they are idle.
- Runs off of a single user-provided 7.5 to 15 volt DC power supply. The board may also be configured using a split supply, wherein the motors run off of a separate DC power supply, while the logic circuit runs off of a 5 volt DC supply.
- Theoretically, an unlimited number of boards can be controlled via one serial line, if the SerRoute product is used.
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