The power screw is driven from the drive gear on top of the motor to the driven gear on top of the power nut. The power nut is an aluminum nut that the power screw passes through. First check drive gear on top of the motor. The drive gear is held to the motor shaft by a setscrew against the motor shaft. The setscrew can loosen and the drive gear will disengage from the driven screw. If this is the case turn the power off, move the drive gear to engage the driven gear and tighten the setscrew. If the gears are properly engaged, the threads in the aluminum power nut can wear out. Thread the power nut off the top end of the power screw and inspect it. On older 94 series and all 93 series the torque bar power screw and torque bar can jump if a large specimen breaks. This may disengage the drive and driven gears. Inspect and engage gears.
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The tester up travel is controlled by the over-force connector at the top left of the tester. It is a two pin round connector. If you have a DFM or CFG gauge cell, make sure connection is installed properly. In case of the DFM the power must be on and you must tare before the tester will run up. If this does not help, after the load cell is identified by the DFM, disconnect the load cell from the DFM. Tare the DFM. If the tester runs up there is a problem with the load cell.
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If clamps worked previously but not now, the teeth in the clamp may be worn or dirty. Inspect the part of the clamp that touches the specimen. You will notice teeth or groves that help grip the specimen. Clean if noticeable build up is noted. If this does not help please contact Com-Ten Industries for replacement jaws or clamp repair service. A new specimen type may require different clamp properties. If the specimen is new please contact Com-Ten Industries for advise.
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The maximum speed of your tester is governed by the motor and gear combination. If you want to run your tester faster than it's design limits, contact Com-Ten Industries for instructions. The motor, drive gear, driven gear and power screw may have to be changed. Higher speed will reduce the maximum force capabilities of your tester.
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Com-Ten Industries no longer manufactures six-inch dial force indicators but they can be repaired and calibrated. Return the gauge to Com-Ten Industries with a telephone contact and name for evaluation. You may wish to replace with one of our new digital force indicators.
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