Fact Sheet
VLT® AutomationDrive FC 302 with integrated motion controller
– for positioning and synchronization applications
Discover precision positioning and synchronization control in modern dance
Perform high-precision positioning and synchronization, simply using an AC drive. With the Integrated Motion Controller (IMC) functionality, the
VLT® AutomationDrive FC 302 replaces more complex positioning and synchronization controllers, to save time and cost.
Positioning and synchronization operations are typically performed using a servo drive or a motion controller. However, many of these applications do not actually require the dynamic performance available from a servo drive.
Encoderfree
to save costs and reduce complexity
Therefore the FC 302 with IMC is a costeffective, high-performance alternative to servo in single-axis positioning and synchronizing applications.
Use IMC for many applications that have been solved with servo drives until now, such as:
Rotary tables
Cutting machines
Packaging machines
Use FC 302 to run an induction or PM motor with or without motor feedback – with no need for additional
Feature
Motion control functionality integrated into the AC drive
No encoder and no encoder wiring required
No servo drive required
Configuration via parameters
Home synchronizing
– Renewal of calibration on every cycle
Homing on torque limit
– No sensor required
hardware. With sensorless control (no motor feedback) best performance is achieved with a PM motor. The performance of sensorless control of induction motors is however sufficient for less-demanding applications.
With IMC you save time and cost:
No advanced programming and fewer components means fewer hours needed for engineering, installation and commissioning
Save further cost for a feedback device, cabling and installation by using sensorless control
To save cost for a home sensor and cabling, use the “homing on torque limit” function
The IMC solution provides easy and safe set-up:
Configuration via parameters, with no advanced programming required. Reduced complexity will minimize the risk of errors
To add more functionality, use the Smart Logic Controller (SLC), which is fully compatible with IMC
To realign the home position during operation, use the “home synchronizing” function
Benefit
–Save cost and time for extra components
–Lower purchase cost due to fewer components
–More robust installation
–Reduced electrical and mechanical installation time
–Easier and faster set-up
–No advanced programming required
–Lower purchase cost
–Achieve a safe result
–Save time
–Avoid complexity
–Minimize risk of errors associated with advanced programming
–High level of accuracy maintained continuously in systems with slip
–Save purchase, installation and maintenance cost of extra equipment
www.danfoss.com/imc
Positioning
In positioning mode, the drive controls movement over a specific distance
(relative positioning) or to a specific target (absolute positioning). The drive calculates the motion profile based on target position, speed reference and ramp settings (see the examples in Fig. 1 and Fig. 2 on the right).
There are 3 positioning types using different references for defining the target position:
Absolute positioning
Target position is relative to the defined zero point of the machine.
Relative positioning
Target position is relative to
the actual position of the machine.
Touch probe positioning
Target position is relative to a signal on a digital input
This illustration (Fig. 3) shows the different resulting target with a set target position (reference) of 1000 and starting position of 2000 for each of the positioning types.
Synchronizing
In synchronizing mode the drive follows the position of a master, multiple drives can follow the same master. The master signal can be an external signal e.g. from an encoder, a virtual master signal generated by a drive or master positions transferred by fieldbus. Gear ratio and position offset is adjustable by parameter.
Homing
With sensorless control and closed loop control with an incremental encoder homing is required to create a reference for the physical position of
Position |
Position |
Speed |
Speed |
Fig. 1. Motion profile with linear ramps |
Fig. 2. Motion profile with S-ramps |
Absolute
0 |
1000 |
2000 |
3000 |
4000 |
With absolute positioning, the drive moves backwards from the starting position of 2000 to the absolute position of 1000 related to 0.
Relative
0 |
1000 |
2000 |
3000 |
4000 |
With relative positioning, the drive moves a distance of 1000 forward from the starting position of 2000 ending at position 3000.
Touch probe
0 |
1000 |
2000 |
3000 |
4000 |
Touch probe sensor
With touch probe positioning, the drive starts moving forward from the starting position of 2000, detects the touch probe sensor and moves a distance of 1000 forward from the position of the touch probe sensor.
Fig. 3. IMC supports 3 positioning modes
the machine after power up. There are several home functions with and without sensor to choose from. The home synchronizing function can be used to continuously realign the home position during operation when there is some sort of slip in the system. For example in case of sensorless control with an induction motor or in case of slip in the mechanical transmission.
DKDD.PFF.300.A5.02 |
© Copyright Danfoss Drives | 2020.09 |