Mov-A-Load Corporation PJCKM1T 사용자 설명서

 

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The receiver PCB is designed to go into a safety mode whenever the lift gearmotor is put into a stall 
condition, such as when the lift screw is at either of its limits.   When in this safety mode, the operating 
condition LED will illuminate red and the function associated with the overload will cease to operate.  To 
exit the safety mode, press the transmitter button that controls the opposite function (press DOWN if the lift 
screw has hit the UP limit or vise versa).  In some cases, the lift screw may be jammed against a limit to an 
extent that the gearmotor cannot provide enough power to reverse the screw and back it off the limit.  An 
access plug is provided in the top of the PCB cover so that a 9/16-inch socket wrench can be used to turn 
the lift screw and back it off the limit. 
 
The PROJACK M1 unit utilizes three (3) gearmotors.  One gearmotor is located near the top of the unit and 
provides power to the lift screw.  The other two gearmotors are located in the lower drive unit.  Each lower 
drive gearmotor operates one of the two (2) drive wheels.  The drive wheels operate independently of one 
another. By varying the ON time and/or the clockwise/counterclockwise rotation of each gearmotor, the 
unit can be driven straight or steered in both forward and reverse. 
 

 

 
The PROJACK M1 unit must be powered by a 12V DC power source.  This power source is usually in the 
form of a 12V lead acid battery which can be housed in the optional direct mount battery box or can be 
mounted somewhere nearby on the trailer tongue frame rails. 
 
The three (3) gearmotors and the 12V DC power source are connected to the receiver PCB by a wiring 
harness.  Each individual wire in the wiring harness is hard wired to the receiver PCB on one end and has a 
¼-inch ring terminal on the other end for attaching to the gearmotors and the 12V DC power source.  The 
wire that connects to the 12V DC power source positive (+) terminal has a 60-amp time delay fuse mounted 
inline to protect the unit from electrical overloads. 
 
Each gearmotor has a .1µf 200-ma ceramic capacitor wired between its power terminals.  This is to help 
filter out electronic noise which could affect the operation of the receiver.