KDA 3.1-100-3-APS-W1 Bosch Rexroth Indramat
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The Bosch Rexroth Indramat KDA 3.1-100-3-APS-W1 is a spindle drive belonging to the KDA Spindle Drives series. It features a rated current of 100 Amps, supports forced cooling with a mounted heatsink blower, and a DC supply voltage of 300 VDC. The drive includes a serial RS 232 C interface and a second encoder input for spindle or additional motor feedback.
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Product Description:
The KDA 3.1-100-3-APS-W1 spindle drive is manufactured by Bosch Rexroth Indramat as part of the KDA Spindle Drives series. Mounted inside a cabinet rack, this module connects to a shared DC bus and outputs controlled three-phase power to a machine-tool spindle motor. By converting the constant bus voltage into variable frequency and amplitude, it enables programmable speed ranges, rapid acceleration, and controlled deceleration for drilling, milling, and turning cycles in automated production lines. This variant is identified as Series 3 for internal revision consistency. The unit acts as an intermediary between the CNC control, feedback devices, and the electromechanical load.
It is energized from a bus link of 300 VDC, a level that offers sufficient headroom for high-speed field-oriented control. The power section can deliver a continuous output of 100 A, allowing heavy-duty spindle motors to maintain torque during deep cuts without current foldback. Thermal regulation depends on a blower that draws its supply from a single-phase 220 V/50–60 Hz source. Airflow is directed through the heat-sink fins, and forced cooling keeps the internal IGBTs below their junction limits during continuous operation. Parameter setting, status polling, and alarm logging are accessed through the onboard Serial interface (RS-232-C), permitting direct connection to a supervisory PC or the higher-level numerical control.
Full performance is supported within an ambient range of 5 to 45 °C, and installation is permissible up to 1000 m above sea level without derating. Speed reference enters the control loop as an analog voltage or current, simplifying interface with legacy CNC channels that produce proportional command signals. A dedicated second encoder socket accommodates spindle orientation or auxiliary motor feedback. This allows accurate threading and tool-change positioning.
Frequently Asked Questions about KDA 3.1-100-3-APS-W1:
Q: What cooling system is used for the KDA 3.1-100-3-APS-W1 spindle drive?
A: The KDA 3.1-100-3-APS-W1 is cooled using a mounted heatsink blower for efficient heat dissipation.
Q: What is the rated current for the KDA 3.1-100-3-APS-W1 spindle drive?
A: This spindle drive has a rated current of 100 A for demanding applications.
Q: How is the speed command value input on the KDA 3.1-100-3-APS-W1?
A: The KDA 3.1-100-3-APS-W1 allows speed command input via analogue signals.
Q: What is the function of the second encoder input on the KDA 3.1-100-3-APS-W1?
A: It supports a second encoder input that can be used for spindle or additional motor feedback.
Q: What type of additional interface is included on the KDA 3.1-100-3-APS-W1?
A: The KDA 3.1-100-3-APS-W1 features a serial interface (RS 232 C) as an additional interface.
