VAC D8-B
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The VAC D8-B spindle drive operates on a power supply voltage of AC170V-AC250V at 50/60Hz, features six power transistors, and uses a PT768 main diode module rated at 75A 800V. Part of the VAC Spindle Drives series by Okuma, it includes a VAC-BOARD-II control PCB with potentiometer adjustments for speed and load meters.
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Product Description:
The Okuma VAC D8-B is a well-known spindle drive designed to make it easy to control the spindle motor in CNC machines. The spindle drive is compatible with an AC170V-AC250V, 50/60Hz power supply range, so this is among those power settings that can be used in many industries. It has six power transistors and a primary power diode module (PT768) of 75A and 800V, which contributes to improved power management by regulating current and voltage. The modules used are either the EVM31-050A or the QM150DX-H transistor. They are rated for 150A at either 600V or 450V, offering flexibility in application.
VAC D8-B has the control system containing a VAC-BOARD-II PCB that executes the operation of the drive. It has a 50-pin CN1 control signals connector and a 16-pin motor signals connector. The main parts of this control PCB are a circuit regenerator, a transformer, LEDs and DIP switches. The regeneration circuit recovers excess energy by redirecting it back into the system, reducing power loss during braking. The transformer controls the voltage conversion of various components of the board. LEDs provide visual indicators of system status and fault conditions, while DIP switches allow manual configuration of control settings based on the specific operation being performed. This leads to simplified and precise machining operations, giving the operator accurate control and a better chance to achieve consistency, essential in high-quality and detail-oriented manufacturing operations.
The VAC D8-B also offers flexible adjustment options in the form of potentiometers or the Speed Meter (SM) and Load Meter (LM) for reliable performance. The knobs enable the technicians to increase or reduce the spindle speed and adjust load levels as needed, and deliver precise control during machining operations.
Frequently Asked Questions about VAC D8-B:
Q: What is the supported power supply voltage range for the VAC D8-B spindle drive?
A: The VAC D8-B operates on an input voltage of AC170V to AC250V at 50/60 Hz.
Q: What are the ratings of transistor modules in the VAC D8-B?
A: The transistor modules in the VAC D8-B are rated at either 150A/600V or 150A/450V.
Q: How many power transistors are built into the VAC D8-B?
A: The VAC D8-B contains 6 power transistors.
Q: What type of connector is used for motor signals in the VAC D8-B?
A: The VAC D8-B uses a MATE-N-LOCK connector (1-480438-0, 16-pin) for motor signals.
Q: Which potentiometers are available for adjustment in the VAC D8-B?
A: The VAC D8-B includes SM (Speed Meter) and LM (Load Meter) adjustment potentiometers.
