A common test utilizing this equipment is the "cold start" test; where the temperature is soaked at -40Ð overnight and the joints are set at a high angle. The user then starts the rotation at a slow speed (approximately 250 RPM) to find out if the C-V joints or the rubber boots hold up under the stress.

The chamber can be set up for half shafts with the X-Y table (for shafts with two joints) or for quarter shafts with angular towers (shafts with one joint). In its standard design, the Envirotronics Model ED80-2-10-WC can accommodate four shafts. Six shafts can be accommodated in a "stretched" version of the chamber. Envirotronics' Engineering staff can design to meet your specific needs regarding shaft length and input flanges.

Envirotronics ED80-2-10-WC Temperature Cycling Chamber with Variable Speed Drive System offers its user the benefit of temperature, shaft speed, and angulation test equipment all combined in one test system.

»Allen Bradley AC Drive System
The Allen Bradley AC Drive System controls the shaft speed, acceleration, deceleration, and starting torque. In the example of the "cold start" test, the starting torque is set to maximum. 200% power is generated for the first 15 seconds and 150% power for the next 45 seconds. If this drive system were not utilized, the motor horsepower requirement would need to double to match the starting torque performance.

Additionally, the use of the Allen Bradley AC Drive System allows us to "over-speed" the motor. A 1200 RPM motor can now run 0 to 2500 RPM. Envirotronics also has the flexibility to modify the acceleration and deceleration rates as required by our customers.

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»X-Y Table Fixturing
The X-table has Frelon-lined linear bearings mounted underneath for x-axis movement and the y-axis mounted on to for mounting the y-fixture. When the table is moved, the "plunge assembly" pulls the y-fixture accordingly keeping the shaft length the same. This provides angulation for the product under test, typically C-V joints. Envirotronics also provides interior bearing mounting plates, which allow the interior joints to be rotated differently from the other set. This translates into complete flexibility and adjustment possibilities for the use of Envirotronics' ED Model.

»Auto-Plunge System Option
The inboard C-V joint has a "plunging" (moves in and out parallel to the shaft) movement that would make the boot stretch. Envirotronics' unique Auto-Plunge System Option automatically moves the joint in and out, while the shaft is rotating and changing angles. This subjects the C-V joint to constant plunging while other testing means are done. The constant plunging adds the benefit of accelerated life testing on the C-V joints and boots.

»Auto-Reciprocation Option for the (4) half Shaft System
With Envirotronics' Auto-Reciprocation Option, the user can reciprocated between two preset angles, constantly changing the angle while the shafts are rotating. This constant angulation adds, once again, the benefit of accelerated life testing on the C-V joints and boots.

»Auto-Angulation System Option for Half Shaft Fixturing
With Envirotronics' Auto-Angulation System Option, the user can set the C-V joint angle from channel three of the Systems Plus controller/programmer. When the angle positioning comes from the controller, then the user no longer has to manually move the fixturing to achieve the desired angle. The user must enter the x-table movement (in millimeters), which is a calculation from the angle required as a function of the shaft length between the C-V joints. The angle positioning can also be programmed to change.

Please direct any inquiries to:
›sales@envirotronics.com