DR-38M : 4.0 Amp Microstep Chopper Drive - ADVANCED MICRO SYSTEMS - #1

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OVERVIEW The DR-38M is a low cost, bipolar step motor driver designed to meet O.E.M. requirements for reliable, cost effective operation. The DR-38M operates in full, half or microstep mode at speeds up to 40k SPS. It uses a single power supply input voltage, between 24 and 40 Vdc, to generate a drive current output of 4.0 amps per phase. The DR-38M also implements a serial interface and non-volatile memory for configuration storage. Features: · Low cost - small size · Heat sinkable case · Direction sensitive limit inputs · Speed sensing slow and fast decay · 24 to 40 Vdc power supply input · 4.0 amp output current (Peak) · Output disable input · Gentle power-up to reduce surge current · Full, 1/2, 1/4, 1/8 step resolution · Multi-speed jog inputs · Auto current setback · Serial interface for data entry · “NV” memory configuration storage · Optional “shuttle control” mode · Mating connectors included JOG INPUTS The DR-38M has dual speed “jog” inputs. Both speeds are programmable via the serial “B” command. These speeds are stored in the NV memory until modified. When changing jog speeds, acceleration and deceleration can be controlled to help prevent stalling. Jog 1 and 2 initiate motion in opposite directions, while “Jog Speed” selects between the two preprogrammed velocities. “SHUTTLE CONTROL” Optional encoder circuitry can be specified with the DR-38M (E). With this option the step input pins become quadrature A and B inputs. The quadrature clocks, when applied to the A and B inputs, are converted to step and direction signals. The number of steps per encoder revolution are equal to four times the number of “slots” on the encoder. The motor will follow exactly any changes in the encoder position. SERIAL COMMANDS A limited set of commands permit the programming of parameters and storage in NV memory. Two contacts (RXD and TXD) are provided for serial communication. Available commands include: B (Jog Speeds) b (Decay Threshold) C (Clear / Initialize) D (Divider) I (Initial Velocity for Jog Spped) K (Acceleration / Deceleration) M (Motion Test) S (Store) X (Examine Parameters) SIN-20 SERIAL ADAPTER For convenience, AMS offers a SIN-20 serial adapter that plugs directly into the DR-38M. The SIN-20 features: · Seven protected inputs · 5mm terminal blocks · Jog push buttons · Motion indicator · Limit switch input buffers · Jog switch input buffers · Input threshold 2.5 or 5-volts Once programmed, the SIN-20 can be removed and the programmed values will be retained. BLOCK DIAGRAM DR-38M MICROSTEP DRIVER (Shown with SIN-20 Adapter)