Product

• Lotem™ 400
• Lotem 400 PSM
• Lotem 400 Quantum

Note: This tip applies to manual loading machines, and version 1.50.08.

Symptoms

Cause

Background

The parameters control the completion of the GoPos movement of this DC motor. This determines if a "wave" is created between the drum pins and the top of the plate. This wave acts as a spring that keep the plate secured against the drum pins. 

Many Lotem 400 loading motor "extra" movements (Extra to drum) end by reaching the final position (for example, In Drum Final_mm). Though the drum pins stop the plate movement, the loading motor can keep moving (defined by the relation between the friction and the torque). Normally the motor continues to revolve over the plate. 

With the current parameter setting, we see two behaviors in the field:

• The motor stops revolving and the extra parameter completes the action (desired behavior).
• The motor continues revolving, and the power to the motor is disconnected (undesired behavior).

Solution

Change the Set Power Off After Pid Movement parameter from 1 (default) to 0.

HKEY_LOCAL_MACHINE\SOFTWARE\Scitex\Projects\LOTEM400V\IO OBJECTS\LOCAL 3\DC MOTORS\Plate Loading Motor\Set Power Off After Pid Movement 

Two options exist for the Set Power Off After Pid Movement parameter:

• Terminate the force (no PID loop) = 1
• Keep PID (continue forcing at the end of the movement) = 0

Note: This parameter was tested on version 1.50.08, with good results. It has not been tested on version 1.30.04.

Technical contact(s)

Mario Amir

Submitted by

William Shany

Date submitted

19 Jan 2002