PART NO. 919D2* ALLOWS INFINITELY VARIABLE R.P.M. TO BE SET ON MFA/COMO DRILLS 919D SERIES GEARBOXES AND MOTORS. * OPERATES FROM INPUTS OF 6 - 15 VOLT * OUTPUT 0 - INPUT VOLTAGE * PULSE WIDTH MODULATION PROVIDES PROPORTIONAL OUTPUT CONTROL. * SMALL - COMPACT - ROBUST CONSTRUCTION FOR VERSATILITY AND RELIABLE SERVICE. SPECIFICATION:- Min Input 6 volts Max Input 15volts Min Output 0 volts Dims. 34 x 27 x 18 mm Max Output 15 volts Weight 30 gms approx. Loading 3 amps continuous 5 amps peak only. Insulated spade connectors fitted on input cables Input & output cables 21cm Supply and output cables are trimmed to 21 cm to meet current EMC regulations. Edge to edge frequency, min 1136 Hz, max 1250 Hz, average 1200 Hz. Mark to space varies motor speed. Panel Mounted Variable Speed Voltage Regulator - Part No. 919D2P * Panel Mounted with external control knob. * Allows infinitely variable R.P.M. to be set on MFA/Como Drills. 919D, 927D, 918D (12v), 940D, 941D & 950D series gearboxes and motors. * Operates from inputs of 6-15 volt. * Output 0 - input voltage. * Pulse width modulated provides torque maintenance and proportional output control. * Small - compact - robust construction for versatility and reliable service. SPECIFICATION:- Min Input 6 volts Max Input 15 volts Dims 62mm x 41mm x 4mm (incl knob) Weight 32 gms approx Min Output 0 volts Max Output 3 amps Loading 3 amps continuous 5 amps peak only Supply and output cables must be trimmed to 21cm to meet current EMC regulations. Edge to edge frequency, min 1136 Hz, max 1250 Hz, average 1200 Hz. Mark to space varies motor speed. PANEL MOUNTED BI-DIRECTIONAL VARIABLE SPEED REGULATOR - Part No. 919D2PR * Forward & Reverse PWM Speed Regulator. * Easy installation - Unit panel mounted through 9.5mm hole. (Electrical connection via screw terminals). * 6 - 15v operation d.c. (from smooth non digital d.c. input). * Output 0 - 100% of input voltage. * Compact construction - board size 66 x 58mm These are regulators with variable outputs designed to be used with miniature and sub miniature motors. Allows the motor to be powered from a d.c. source either battery or transformer recitifier (transformer rectifier must have a non digital output). Unit employs PWM circuitry which varies the output pulse width to vary the motor speed while maintaining a constant output voltage. PWM also assists in maintaining motor torque. Output may not zero motor speed in NO load conditions. SPECIFICATION:- Edge to edge frequency 2KHz Linear output response Input 6 - 15 volts d.c. (non digital) Full ‘H’ bridge output drive Rating 3 Amps continuous, 5 Amps peak. Circuit provides approx 1/5th second breaking pause between directional changes.