kb-electronics kbmg Manual Do Utilizador

Note: A 4-quadrant
ACCEL/DECEL accessory
module (KB P/N 8834) is
available as an option.
It provides separate control
of FORWARD acceleration
and deceleration and
REVERSE acceleration
and deceleration.

The DB trimpot sets the
amount of main speed
potentiometer rotation or
analog voltage input
required to initiate control
voltage output.  It is factory
adjusted to approximately
25% of rotation.

The DB trimpot also determines the amount of delay that will occur before
regeneration starts.  Regeneration occurs when the applied load torque is in the
same direction as the motor rotation.
To readjust the DB to factory setting:

i. Set Main Speed pot to zero speed position.

ii. Set DB trimpot to full CCW position.

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iii. Adjust DB trimpot CW until motor hum is eliminated.  (See fig. 19, p. 27 for

graphic illustration of the DB trimpot.)  Note:  If the dead band trimpot is set too
low (CCW direction), the motor may oscillate between forward and reverse.
Adjust dead band trimpot CW until the instability disappears.  (Oscillation may
also occur due to RESP and IR COMP trimpot settings.  See sec. VII, D & F on
page 29.)

Trimpots – These trimpots are used to set the maximum amount of DC current that
the motor can draw in both the forward and reverse directions.  The amount of DC
current determines the amount of maximum motor torque.  They are factory set at
150% of the current established by the jumper J2 setting.

Readjust the CL trimpot as follows:

i. Turn CL trimpot to MIN (CCW) position.  Be sure jumper J3 is in the proper

position approximately equal to the motor DC ampere rating.

ii. Wire in a DC ammeter in series with armature lead.  Lock shaft of motor.

iii. Apply power.  Rotate CL trimpot quickly until desired CL setting is reached

(factory setting is 1.5 times rated motor current).  Be sure control is in forward
direction for FWD CL trimpot adjustment and likewise with REV CL.

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