Braking System

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Braking (DL-6.5 through DL-15)

The holding torque of the internal pneumatic brake is critical in generating quality parts. The quality of the wormset and spindle bearings accurately position the part and the brake must resist the generated machining forces.

The standard internal pneumatic braking system consists of a disk and piston assembly. Molded to the piston is a high coefficient of friction material and when pneumatic pressure is applied the piston is forced against the locking cavity. This system creates superior holding torque.

This internal pneumatic brake is actuated by a solenoid valve and clamp pressure is verified by a pressure switch. On the control side, the brake is actuated via M-code for clamp and unclamp signals. While manually jogging, zero returning, or using a manual pulse generator, unclamping the rotary table is automatic. This braking system requires standard shop air pressure; 80 to 120 psi.. Air supply must be filtered and dry to ensure proper operation and longevity.

The pneumatic solenoid valves used are wired to energize to clamp or energize to unclamp. They are available in 24VDC, 110VAC, and 120VAC to accommodate common M-code electrical signals used by machine tool controls. These valves are equipped with new oval high pull magnets, built in LED for on / off verification and built in surge suppression.

The pneumatic pressure switch with built in bi-color LED gives visual verification of clamp and unclamp of the rotary table braking system is provided on all units.

Braking (DL-16.5 through NC-84)

The braking system for Troyke models DL-16.5 through NC-84 consists of two pneumatically actuated rack & pinion clamping.; systems mounted on opposite sides of the table.  Two locking rods are loaded from the table top and are located against clamping surface of the table.  Each locking rod has a pinion threaded to it on the opposite end, inside the base.  The pneumatic cylinders have the mating rack attached to the cylinder rod.  When the cylinders are retracted, the rack rotates the pinion, which in turn pulls the locking rod onto the clamping surface of the table.  The unit will remain clamped until the rack is extended by the 4-way solenoid valve which is provided for the operation of the clamps.  Air is used to both clamp and unclamp the tables. 

Locking:  The locking web mechanism on this unit is an internal rack and pinion locking system that utilizes double acting pneumatic cylinders, a 4-way solenoid valve and a clamp/unclamp pressure switch (optional reed switches mounted to the clamp/unclamp cylinders may also be used).  This locking system uses normal, dry shop air 80 to 100 PSI.