Beck, R&J Automobile Parts 14-10 Benutzerhandbuch

22

 

All Group 14 control drives are shipped with 

end-of-travel limit switches and all auxiliary 
switches factory adjusted for 100% of travel 
unless otherwise specified at time of order.  Limit 
switches must be set inside the range of the 
built-in mechanical stops to prevent stalling of the 
motor.  
 

Although the switches may be reset through 

adjustment of the cam position, it is usually 
advisable to change the valve travel by using the 
Calibar index feature described on page 24.
 

Each switch should open the motor circuit 

before the mechanical stop is reached.  Use 
the travel index on the output shaft to check the 
setting.  Three percent or more between the 
mechanical and electrical limits is satisfactory.  
To check, drive to the electrical limit using the 

Handswitch, and then turn the Handwheel until 
the mechanical stop is reached.
 

All switches are SPDT and are rated at 6 A, 120 

V ac.  Switches are operated by cams which are 
clamped on to the control shaft.  Setting a switch 
involves loosening the cam, moving the output 
shaft to the desired position, and positioning the 
cam so that it just operates the switch at that point.  
In the following procedure, the use of a continuity 
meter is recommended to determine when the 
switch opens or closes.  If such a meter is not 
available, it is possible to hear the switch click as 
the contacts open and close.

 

This procedure should be used if the factory 

end of travel switch settings must be changed in 
the field.  It is advisable to operate the drive fully 
each direction, using the electric Handswitch 
to check switch settings before attempting to 
change them.  Follow these instructions if they 
require adjustment.

CALIBRATION