3. Operating Modes
3.1. Operation of Programmable Index Drives
All programmable index drives must be run on a VFD/Amplifier. The following MUST be followed to ensure proper
operation and to prevent immediate and irreversible damage to the index drive.
3.1.1. Normal Operation
Normal Operation is defined as starting and stopping the index drive from two fixed points, or from position to po-
sition. Normal operation is the primary operation the index drive will function.
In Normal Operation, the index drive will have three unique speeds during one cycle. The unique periods are as fol-
lows:
ACCELERATION: This is the time the motor and index drive run from zero speed, 0 Hz, to a peak speed. The accelera-
tion time should never be less than 0.5 seconds for a programmable index drive. Motion Index Drives will provide
the acceleration time recommended for your VFD/Amplifier parameters. The peak speed to accelerate to will also
be provided for your application, traditionally set to 60 HZ MAX!
CONSTANT VELOCITY: This is the time the motor runs at a constant speed, once acceleration is complete. This time is
determined on an application by application basis. In some cases, there is 0 seconds constant velocity, please check
with Motion Index Drives, Inc. for your application. Total Index Time minus acceleration and deceleration time is
equal to the constant velocity time.
DECELERATION: This is the time the motor and index drive run from peak speed (60HZ normal) to 0 Hz, or zero
speed. This time is determined on an application by application basis. The deceleration time should never be less
than 0.6 seconds.
NORMAL OPERATION PARAMETERS:
Acceleration: 0.5 seconds or more - Application Dependant
Deceleration: 0.6 seconds or more - Application Dependant
Frequency: Based on customer application. Never exceed 60Hz max motor frequency unless otherwise instructed
by Motion Index Drives, Inc.
EXCEEDING MOTION INDEX DRIVES RECOMMENDED FREQUENCY AND/OR JUMPING FREQUENCIES DURING NOR-
MAL OPERATION WILL IMMEDIATELY VOID WARRANTY.
3.1.2. Jogging Operation
Jogging is defined as rotating the index drive in a slow, manual mode. This is typically done in the initial setup.
For jogging, it is recommended to run the index drive at a much slower frequency (i.e. 20HZ), and accel/decel rates
are suggested at 0.5 seconds.
3.1.3. E-Stop Operation/Stopping out of Position
E-stop conditions are defined as the immediate stop of the index drive due to one of many factors, including opera-
tor light screen or safety mat being activated, robot errors, or e-stop buttons being activated and involve the requi-
rement of the index drive to stop out of a programmed position. Operating the index drive properly with a VFD/
Amplifier during e-stops, or stopping out of position is critical to ensuring the indexers operation. During the e-stop,
if dynamic braking is being utilized in the VFD/Amplifier, ensure that the dynamic braking time is not any less than 0.6
seconds. Longer braking time is acceptable. During e-stop, it is critical to ensure that the dynamic brake is not driving
through the brake of the motor if the motor is equipped with one. The brake circuit should be applied after the dyna-
mic braking time. To restart from an e-stop or out of position stop, it is suggested to accelerate the motor to the peak
motor frequency if applicable using the same acceleration time provided in normal operation. The same decelerati-
on time should also be followed when approaching the next known position in the normal operation mode.
E-stop/Stopping Out of Position Parameters:
Acceleration: 0.5 seconds or more – Application Dependant
Deceleration: 0.6 seconds or more - Application Dependant
Frequency: Based on customer application. Never exceed 60HZ max motor frequency unless otherwise instructed
by Motion Index Drives, Inc.
Dynamic Brake Time/Decel Time during e-stop: >0.6 seconds
Warning: It is imperative that the controls individuals understand this operation prior to commissioning an index
drive. For any questions, please contact Motion Index Drives, Inc. prior to commissioning index drive to prevent
irreversible damage to the index drive from improper operation. Improper operation of the index drive with va
-riable frequency drive will immediately void warranty!
Warning: Motors supplied w/brake: Brake is only used for holding position and should NEVER be used for stopping indexer
under normal conditions or during an emergency stop!
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