G203V STEPPER DRIVE REV 7: January 7, 2010 Thank you for purchasing the G203V drive. The G203V is Geckodrives new generation CPLD-based microstep drive. It has short-circuit protection for the motor outputs, over-voltage and under-voltage protection, over-temperature protection, reversed power supply polarity protection and will survive accidental motor disconnects while powered-up. The V in G203V stands for Vampire as it is an unkillable drive. The G203V uses a synchronous PWM design that is absolutely silent when the motor is stopped or turning slowly. It virtually eliminates stopped-motor heating regardless of power supply voltage. The G203V is a jumper-free drive. There are no internal user settings at all so there is no need to ever remove the drive cover at all. The STEP, DIRECTION and DISABLE inputs are opto-isolated. All three inputs work with 2.5V, 3.3V or 5V logic drive signals. The input drive current is now 2.5mA at 2.5V so almost all logic family (74LS, 74HC, etc.) can be used to drive these inputs. The COMMON return for the signals is controller ground referenced instead of +5VDC. This greatly eases the drive to controller interface. There are no unusual STEP to DIRECTION timing restrictions. Stepping occurs on the positive edge of the STEP pulse. The DIRECTION input must be true 200nS before and after this STEP pulse edge. The G203V microstep drive is warranted to be free of manufacturing defects for 1 year from the date of purchase. Anyone who is dissatisfied with it or is unable to make it work to their satisfaction for any reason will be cheerfully refunded the purchase price if the G203V is returned within 15 days of the purchase date in a cosmetically and electrically undamaged condition. PLEASE READ FIRST BEFORE USING THE G203V Before you start you must have a 2-phase hybrid PM step motor (ordinary 1.8 or 0.9 degree per step motor), a DC power supply suitable for the motor and a current set resistor. The motors rated phase current must not be more than 7 Amps. The power supply voltage must be between 15VDC and 80VDC unregulated. The current set resistor may be a 1/4-Watt, 5% part. Finally have a STEP, DIRECTION and DISABLE (if needed) source available. G203V TERMINAL WIRING The G203V uses a 2-piece modular main connector. The connector is split in two pieces terminals 1 through 6 (power supply and motor leads) and terminals 7 through 12 (control interface). Each can be removed separately by pulling the connector body upwards and off of the mating header pins on the G203V. The connectors must initially be removed to mount the G203V to a heatsink or chassis. TERMINAL 1 Power Ground Connect the negative (black) lead of your power supply to this terminal. TERMINAL 2 Power (+) Connect the positive (red) lead of your power supply to this terminal. It must be between +18VDC to +80VDC. TERMINAL 3 Motor Phase A Connect one end of your Phase A motor winding here. TERMINAL 4 Motor Phase /A Connect the other end of your Phase A motor winding here. TERMINAL 5 Motor Phase B Connect one end of your Phase B motor winding here. TERMINAL 6 Motor Phase /B Connect the other end of your Phase B motor winding here. TERMINAL 7 Disable This terminal will force the winding currents to zero when tied to the step and direction controller +5V. TERMINAL 8 Direction Connect the DIRECTION signal to this terminal. TERMINAL 9 Step Connect the STEP signal to this terminal. TERMINAL 10 Common G203V STEPPER DRIVE REV 7: January 7, 2010 Connect the controllers GROUND to this terminal. TERMINAL 11 Current Set Connect one end of your current set resistor to this terminal. TERMINAL 12 Current Set Connect the other end of your current set resistor to this terminal. POWER SUPPLY WIRING TERMINAL 1 Power Ground Connect the power supply ground to term.1 TERMINAL 2 Power (+) Connect the power supply + to this terminal The power supply voltage must be between 15 VDC and 80 VDC. The maximum power supply current required is equal to the motors rated phase current. An unregulated power supply may be used so long as the voltage stays between the specified limits keep the power supply ripple voltage to 10% or less for best results. CAUTION Power supply voltage in excess of 80 VDC will blow the G203V internal fuse. CAUTION Reversed power supply polarity will blow the G203V internal fuse. CAUTION Never put a switch on the DC side of the power supply This will damage, if not destroy, your drive The choice of power supply voltage depends on the required high-speed performance from the motor doubling the voltage doubles the motors high-speed power. In all cases the power supply voltage should be no less than 4 times or no more than 20 times the motors rated voltage. The motor may not run as smoothly as possible if the power supply voltage is less than 4 times or more than 20 times the motors rated voltage. A power supply voltage greater than 20 times the motors rated voltage may overheat and damage the motor. Motor winding inductance should be 500uH or greater. A more accurate calculation of power supply voltage is to find your motors inductance, and put it into the following equation. 32 * (mH inductance) = Power Supply Voltage If your motor has 2mH of inductance, the equation would look as follows. 32 * (2) = 45.12V MOTOR CONNECTION TERMINAL 3 Phase A Connect one motor winding to this terminal TERMINAL 4 Phase /A Connect the other end of the winding to this terminal TERMINAL 5 Phase B Connect the other motor winding to this terminal TERMINAL 6 Phase /B Connect the other end of the winding to this terminal One motor winding connects to terminals 3 and 4 and the other winding connects to terminals 5 and 6. Turn the power supply off when connecting or disconnecting the motor. If the motor turns in the wrong direction, reverse the motor winding connections to terminals 3 and 4. CAUTION Avoid shorting the motor leads to each other or to ground or the G203V will enter protective shut-down. 4-wire, 6-wire and 8-wire motor may be used. If 6-wire motors are used, they may be connected in half winding or full winding. This is equivalent to an 8-wire motor connected in parallel or series. If a motor is connected in series or full winding, the motors