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Series 1999SEMC Semelex® Safetimeter
6380 Brockway Rd, Peck, Michigan 48466 • Phone: 248-435-0700
2. Normally Closed Switch (PSD0110309). Designated with a red plug. Used over an E-STOP button, this switch starts
the Safetimeter timing when pressed. Note: The Normally Closed switch has been obsoleted and is no longer
available for sale.
Perform the following Steps:
1. Set the TIME UP/TIME DOWN, FULL REV/PART REV, and STOP TIME/SAFETY DISTANCE switches as required.
2. Mark the ram or slide and frame with chalk, paint, etc. at the 90-degree point.
3. When the marks are aligned during the stroke of the press, release or push the Manual Start Switch being used.
This takes practice to get into sync with the press. Ten to 20 strokes may be needed. Be sure the readings are fairly
repetitive. Using the Manual Start Switches is less accurate than Auto-Hand.
4. The Manual Start switch can also be used in conjunction with the Auto-Hand. In many cases the manual start
switch can be used to throw the Auto-Flag through a light-curtain to initiate a stop.
3.7: Using Optional Remote Tachometer
For testing continuous stroke or high-speed presses perform the following steps:
1. Connect the Remote Tachometer to the P/V Transducer cable in the Safetimeter case. When
using the Remote Tachometer, the P/V Transducer is not used.
2. Position the Remote Tachometer on the press (machine) with the magnetic base. Center the
rubber nose cone on the rotating shaft, such as a press’s crankshaft or cam switch shaft.
Good axial alignment is needed.
NOTE: If the shaft rotation, viewed by the tachometer, is clockwise, toggle the TIME UP/TIME
DOWN switch to TIME UP. If the shaft rotation is counterclockwise, toggle the switch to TIME
DOWN. Toggle the STOP TIME/SAFETY DISTANCE switch to STOP TIME.
3. If the press is to be tested from the E-STOP button, use the normally closed (red) Manual Start Switch. (See section
3.6: Using Optional Manual Start Switches). When testing the press RUN or INCH button(s), use the normally open
(black) Manual Start Switch.
4. Choose the correct switch and plug it into the Manual Start jack on the controller.
5. Tape the switch temporarily over the control button. Cycle the press. When pressing the Manual Start Switch and
E-STOP button simultaneously, the press begins to stop and the Safetimeter starts counting. After the press stops,
the Safetimeter displays STOP TIME in milliseconds. Similarly, the Normally Open Manual Start Switch released
simultaneously with the RUN or INCH button starts the Safetimeter counting upon release.
NOTE: Run several tests, initiate stops at the same position in the stroke. Results should be fairly repetitive. Use only
the largest values in determining safety distance to be used. Prudent judgement suggests adding 10% to 20% to the
readings being measured.
NOTE: The Auto-Hand with Auto-Flag option can also be used with the Remote Tachometer. In this scenario,
depending on which manual start switch you are using, simply press or release the button on the downward stroke to
initiate the controller to start a measurement and release the Auto-Flag through the Light Curtain.
Note: When determining SAFETY DISTANCE for light curtains, the depth penetration factor must be added to
the Safetimeter reading.
