Operating instructions
Table Of Contents
- Mart Cart Model 3563 Technical Overview
- Table of Contents
- Major Parts Overview
- Battery/Circuit Breaker
- Charger
- Wire Harness
- PWM
- Control Box
- Hub Motor
- Potentiometer/PWM Relationship
- Potentiometer/PWM Relationship
- Calibrate PWM
- Calibrate PWM – Check Brake Leads
- Parts List
- Parts List – Steering Column
- Wiring Diagram
- Tools
- Safety Check
- Warranty
- Serial Number Label
- Mart Cart End Technical Overview
Potentiometer/PWM
Relationship
The potentiometer (pot) along with the PWM regulates the speed and direction of the motor. The
PWM monitors the change in resistance on pins 1, 2, and 3 of the 10-pin connector which are
connected to the pot (pins 1, 2, and 3 respectively) through the steering wire harness. The pot is
located in the control box and is physically connected to the throttle control on the cart’s
handlebars. The resistance is varied by the movement of the thumb-control throttle in a forward
and backward direction.
In turn, the PWM emits variable voltage to the positive and negative motor leads (connected to the
PWM), allowing the motor to move at varied speeds forward and backward.
The pot is rated at 5K ohms +/- 10%. This is the resistance between pin 1 and pin 3 on the pot’s
terminals. When the pot assembly is set at the factory, the wiper (pin 2) is calculated and preset to
24% of the total resistance (approx 1.08K to 1.32K ohms). The wiper position of the pot is where
the PWM looks for the “neutral” position. In the neutral position, the PWM cuts power to the motor
leads and brake leads (engaging the brake).
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2
3
Pot PWM
Hub Motor