KDA 3.2-050-3-AYS-U1
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The KDA 3.2-050-3-AYS-U1 is an air-cooled spindle drive with a continuous current of 50 A and a peak current of 100 A. Manufactured by Bosch Rexroth Indramat as part of the KDA Spindle Drives series, it operates with an input voltage of 3 x 400 V AC ±10% at 50/60 Hz. The drive has IP20 protection and weighs approximately 11 kg.
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Product Description:
The KDA 3.2-050-3-AYS-U1 Spindle Drive operates with a DC bus voltage of 300 VDC, which makes it suitable for stable delivery of power for high-speed spindle applications. This spindle drive is a product of Bosch Rexroth Indramat, and its continuous current rating of 50 A allows it to drive motors demanding high torque during intensive machining operations.
This spindle drive’s speed control is performed through an analog input signal of ±10V, which provides smooth, responsive variation in motor speed. For communication and auxiliary purposes, this drive includes a serial interface that adheres to RS-232C standards, enabling connection to external systems for diagnostics, parameter setting, and operation monitoring. The KDA 3.2-050-3-AYS-U1 drive has a special auxiliary encoder input with synchronous signal capability, which is enabled by the AS 35 configuration. This input has both auxiliary and real-time synchronized signal support, which is vital for accurate positioning and coordination in CNC applications. This spindle drive’s thermal management is taken care of by a forced cooling facility through a heatsink-mounted blower that keeps it at working temperature levels even at full load.
The built-in LE4 blower unit is of mass 4.2 kg and is responsible for the sturdy thermal capability of this drive in confined enclosures. This blower also demands an AC power supply of 115V at 50–60Hz and supplies quality airflow over heat-sensitive materials. This spindle drive is compatible for operation within an ambient temperature range of +5 to +45 °C under rated conditions. Under short-term exposure, the KDA 3.2-050-3-AYS-U1 can handle a maximum ambient temperature of +55 °C, which safeguards system performance during sudden thermal peaks. This drive’s installation is compatible up to an altitude of 1000 meters, with full output capability without derating under normal environmental conditions.
Frequently Asked Questions about KDA 3.2-050-3-AYS-U1:
Q: How does the RS-232C interface improve diagnostics in KDA 3.2-050-3-AYS-U1?
A: It allows for serial communication with external systems for parameter adjustments. This ensures real-time access to internal drive status during operation.
Q: Why is a ±10V analog speed input used instead of a digital interface?
A: Analog inputs provide quick and continuous speed variation for motor control. This is especially effective in older systems or applications requiring smooth acceleration.
Q: How does the AS 35 encoder configuration help in synchronous control?
A: It enables high-resolution feedback signals for precise position matching. This helps in synchronized multi-axis motion in automated machinery.
Q: What is the impact of the 50 A current rating on spindle performance?
A: The high current rating allows it to drive larger spindles under continuous heavy loads. This supports uninterrupted cutting cycles in metal and composite materials.
Q: Why does the KDA 3.2-050-3-AYS-U1 use a 115V blower power source?
A: A 115V AC blower source ensures compatibility with standard industrial power systems. It also simplifies integration without requiring external voltage converters.
