VACII D22-A
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The VACII D22-A is equipped with a D22A power supply unit and a control PCB setup featuring a VAC board II and VAC card 1. Developed by Okuma as part of their VAC Spindle Drives series, it operates with a cooling fan motor voltage of 200V at 50/60 Hz. The drive uses warning fuse types SMP32 and MP50.
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Product Description:
Okuma produces the VACII D22-A which is high performance VAC Spindle Drive that is applied in CNC machining. It is made to control spindle motors precisely. The VACII D22-A has a 22 kW power capacity that allows the spindle to be controlled easily and stably with continuous work in the machining process.
The VACII D22-A spindle drive has two major internal circuit assemblies namely the VAC Board II and the VAC Card 1. It comes with 6 selector switches marked SW1 to SW6 where a change in configurations can be made in respect to many different machine needs. The spindle drive is equipped with an external aluminum heatsink to help in ensuring that there is optimum thermal dispersion. It has an LED interface which has 2 digital 7 segment diagnostics which allows troubleshooting. The VACII D22-A spindle drive internal configuration is controlled with DIP type selector switches mounted on the circuit boards. The drive been fitted with three high capacity electrolytic capacitors to make the energy storage and discharge stable. It can safely work at 1000 meters in altitude above sea level. The spindle drive will handle feedback which uses either encoder signals or resolver feedback data to accurately place motors. It is combined with built in circuit breakers and fast acting fuses to protect it. The drive enclosure is constructed to be rack mounted so it is compatible with standard industry cabinets. Its variable control elements contain three precision trimmer potentiometers denoted VR1 to VR3.
The VACII D22-A spindle drive has short circuit protection that is fairly reliable and increases the safety of operation. It also has a high density mounting interface which supports the rack based integration of machine enclosures. The spindle drive motion is usually combined with Okuma OSP series CNC controllers that are being used to optimize the performance.
Frequently Asked Questions about VACII D22-A:
Q: How do the trimmer potentiometers VR1 to VR3 in VACII D22-A affect spindle performance?
A: They allow fine manual tuning of control parameters like gain and speed to match machine requirements precisely.
Q: Why are high-capacity electrolytic capacitors used in the VACII D22-A spindle drive?
A: They stabilize voltage fluctuations and ensure steady power discharge during load transitions and braking.
Q: How does the LED diagnostic display in VACII D22-A simplify maintenance?
A: It provides clear visual fault codes, helping operators identify and troubleshoot system issues quickly.
Q: What’s the role of DIP selector switches in VACII D22-A spindle drive setup?
A: These switches allow configuration changes at the hardware level, tailoring drive response to specific machines.
Q: Why is a heat sink essential in the VACII D22-A’s thermal design?
A: It dissipates heat from the drive’s power components, preventing thermal shutdown during prolonged use.
