Mechanical Systems
Lift Goes Down to End of Strap and Up Again with Up/Down Functions Reversed
The “slack strap” safety feature is not working:
• Because the roller assembly inside the tape switch assembly is stuck and is therefore
not activating the micro switch. Clean the inside assembly of all debris and make sure all
parts are loose. Then check for the click of the switch as the roller assembly comes to
the end of the slot. If there is no click, The 2 switch screws should be loosened and the
switch pushed closer to the tape switch roller. Make sure that nothing is stuck or jammed
in the assembly.
• Because the switch is too close to the roller assembly. The 2 switch screws should be
loosened, and the switch pushed farther away from the tape switch roller.
• Because of a wiring problem. Check the wiring from the tape switch assembly to the
main circuit board.
• Because the micro switch is malfunctioning. Replace the switch.
Lift Intermittently Performs a Pneumatically Controlled Function by Itself
Pneumatically controlled functions are on/off, emergency lowering, up, down and, where
applicable, power traversing of lift and gantry.
There is likely a slow leak in the pneumatic system. The first elements of the pneumatic system
to be checked are the grommets (there is one on the hand control and one on the lift). For a
complete check of the pneumatic system, see sections 1 and 2. Frequent detachment and re-
attachment of the airline or rough usage causes wear and tear in the air holes of the grommets.
Clients should NEVER use the hand control/airline to pull the lift along the track.
Strap Goes Completely into Gearbox
The “thick strap” safety feature is not working:
• Because the moving roller assembly does not activate the switch. Introduce a slight
bend in the metal strip (which activates the switch) such that activation takes place when
a double thickness of strap is forced between moving rollers inside the tape switch
assembly. Make sure that nothing is stuck or jammed in the assembly.
• Because of a wiring problem. Check the wiring from tape switch assembly to the main
circuit board.
• Because the Microswitch is malfunctioning. Replace the switch or re-align it.
Lift Traverses Poorly at Specific Points in Track System
Identify the points of blockage:
• Is the blockage at the seam of two pieces of track? Correct the vertical and/or horizontal
alignment.
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