G203V STEPPER DRIVE GeckoDrive（G203V步进驱动GeckoDrive）.pdfVIP

G203V STEPPER DRIVE REV 7: January 7, 2010 Thank you for purchasing the G203V drive. The G203V is Geckodrive’s new generation CPLDbased microstep drive. It has shortcircuit protection for the motor outputs, overvoltage and undervoltage protection, overtemperature protection, reversed power supply polarity protection and will survive accidental motor disconnects while poweredup. 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 stoppedmotor heating regardless of power supply voltage. The G203V is a jumperfree 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 optoisolated. 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.