MOTORS

DC Servo Motor Specifications for the PIC-SERVO SC Board Brush-type DC motor TTL Compatible 2 or 3 channel incremental encoder (index channel optional) Up to 48v winding 3 amp (or less) continuous operating current The PIC-SERVO SC Motor Control Board can be used to control DC brush-type motors equipped with TTL compatible incremental encoders. Its amplifier can be operated from 12 to 48vdc and can source up to 3 amps cont., 6 amps peak. If you select a motor which falls within these parameters, you will be able to operate at its extreme conditions. Typically, however, a motor's stall current is many times higher than its continuous rated current, and the actual operating voltages required may be less than listed winding voltage. Therefore, the PIC-SERVO SC amplifier may be used effectively with motors which have specs outside those listed. Ultimately, you will have to examine the specs for a particular motor to see if it can be used effectively for your particular application. The PIC-SERVO SC Motor Control Board can also be used with external amplifiers for applications requiring a brushless motor or requiring motors with more power than can be delivered by the PIC-SERVO SC board's integrated amplifier. (back to top) Brushless Motor Specifications for the PIC-SERVO SC 3PH Board 3-phase brushless motor with hall effect commutation sensors -or-Brush-type DC motor TTL Compatible 2 or 3 channel incremental encoder (index channel optional) Up to 48v winding 6 amp (or less) continuous operating current The PIC-SERVO SC 3PH Motor Control Board can be used to control 3-phase brushless or brush-type DC motors equipped with TTL compatible incremental encoders. Brushless motors should be equipped with 3 TTL compatible hall-effect sensors for commutation. The controller's amplifier can be operated from 12 to 48vdc and can source up to 6 amps cont., 7 amps peak. If you select a motor which falls within these parameters, you will be able to operate at its extreme conditions. Typically, however, a motor's stall current is many times higher than its continuous rated current, and the actual operating voltages required may be less than listed winding voltage. Therefore, the PIC-SERVO SC 3PH amplifier may be used effectively with motors which have specs outside those listed. Ultimately, you will have to examine the specs for a particular motor to see if it can be used effectively for your particular application. (back to top) Stepper Motor Specifications for the PIC-STEP Board 2-phase bipolar stepper motor (4 lead configuration) -or-4-phase unipolar stepper motor with 6 or 8 lead configuration Up to 45v winding 2 amp/phase (or less) operating current The bipolar chopper drive of the PIC-STEP can drive motors designed for either bipolar or unipolar drives. If you have a unipolar motor with 6 or 8 leads, please see the manufacturer's specifications for wiring to a bipolar drive.The bipolar chopper drive continuously regulates the winding current so that you can use a supply voltage which is much higher than the rated winding voltage. (For example, you could use a 24v supply with a 6v winding.) Using a higher supply voltage will allow you to operate your motor at much higher speeds.Stepper motors are usually sized to meet a running torque requirement at a particular speed rather than sized according to their holding torque. For example, a 120 oz-in (holding torque) motor with a rated current of 3 amps may only provide 40 oz-in of torque at 10 rev/sec, and would only require a current of 1 amp. If this was the limiting factor in the motor selection, the 2 amp current rating of the PIC-STEP would be more than sufficient. Ultimately, you will have to examine the specs for your particular motor and your application requirements to see if the PIC-STEP will be compatible. Note that you can also use the PIC-STEP with higher power external drivers. (back to top) Motor Suppliers We do not sell motors, but the following is a list of some quality motor suppliers:Pittman Motors (www.pennmotion.com) - DC motors and brushless motors with encoders and gearheadsMaxon Motors (www.mpm.maxonmotor.com) - DC motors and brushless with encoders and gearheadsMicroMo (www.micromo.com) - DC motors and brushless with encoders and gearheadsGlobe Motors (www.globe-motors.com) - DC motors with encoders and gearheadsSKC (Shinano Kenshi) (www.shinano.com) - Stepper Motors, DC motors and brushless motorsMCG (www.mcg-net.com) - Stepper motors, DC motors and brushless motors with encoders and gearheadsOriental Motors (www.orientalmotor.com) - Stepper motorsDynetic Systems (www.dynetic.com) - DC motorsAdditionally, surplus motors for prototyping and testing can be found at:Servo Systems, Inc.Herbach & RademanBrigar ElectronicsElectronics GoldmineJameco Electronics