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Invertek Drives has introduced the Optidrive E2 variable-speed drive for machine tools manufactured for use in the educational sector.

In late 2005, the Denford design team developed two new routing machines; the Compact 1000 and Router 2600.

To allow users to work with a wider variety of materials, a new metal-cutting facility was added, allowing a wider output speed range.

The models with this feature were called Compact 1000PRO and Router 2600PRO.

These machines allow high-speed routing and are rigid enough to allow cutting of non-ferrous metals.

For a machine to cut as a router and to cut non-ferrous materials requires high spindle-speeds, rigid spindle bearings and excellent sealing.

Denford selected a suitable brushless high-speed spindle motor, which allows speeds up to 24000RPM and provides a rigid sealed spindle-unit with a collet to hold the cutting tool.

A suitable inverter allows the motor to achieve the desired speed.

The key requirements were high-output frequency capability, ease of use, low cost and compliance with the necessary CE directives.

Denford originally selected the Invertek Optidrive E 1.5kW, but has since changed to the Optidrive E2.

Optidrive E2 allows the motor to operate from the 8000RPM minimum speed up to the maximum 24000RPM.

The Optidrive features the ability to utilise DC injection braking to stop the spindle freewheeling in the event of a mains power loss.

Invertek provided the Optidrive E2 2.2kW 110V ‘voltage doubler’ drive to Denford for countries with only 110V of power available.

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