Checkline ESM301 - Manual (Page 19)

Model ESM301 / ESM301L Version 2 Test Stand User’s Guide
19
button counter-clockwise until it assumes its original position. To resume the test, press UP or DOWN.
Crosshead movement will take place until a limit has been reached. If the crosshead has stopped at a
soft limit, the limit condition may be overridden by pressing and holding UP or DOWN.
5.3.1 Travel Indication
If enabled, travel indication is displayed in the upper left corner of the display. The displayed units are the
same as programmed in the UNITS parameter. Indicated travel is a relative value. To zero out travel
distance, ensure that the crosshead is not moving, then press and hold STOP.
If the cable connecting the crosshead to the rear of the controller is unplugged, the position value will not
change when the crosshead moves.
5.3.2 Limit Switch Operation
Limit switches allow the operator to set a location along the column at which
point the crosshead will stop moving. Limit switches are located at the rear of
the test stand column, as shown in the image to the left. Adjust the switches’
positions by loosening, repositioning, and re-tightening the thumb screws. The
thumb screws must be installed after unpacking. They are shipped separately
to avoid damage in transit.
5.3.3 Overload Protection
The 09-1162 cable is required for overload protection of a Mark-10 force gauge. If overload protection is
enabled, the crosshead will stop when the programmed percentage of full scale of the force gauge has
been reached.
When overload protection is enabled, if the 09-1162 cable is disconnected, and/or if the force gauge is
turned off, an error message will appear. Plug in the cable and/or turn on the force gauge to clear the
message.
Note:
When the crosshead is moving in the UP direction, only the tension overload setting is active.
When the crosshead is moving in the DOWN direction, only the compression overload setting is active.
5.4 Auto Return Mode
In this mode the crosshead moves to whichever limit it encounters first and stops. Then, the crosshead
returns at maximum speed to the other limit, whichever occurs first, and stops. The speed at which the
crosshead travels is dictated by the SPEED setting or UP SPEED and DN SPEED settings (if
independent speeds are enabled). Press UP or DOWN to initiate an Auto Return sequence.
The crosshead can be stopped at any time during an Auto Return sequence by pressing STOP. To
resume the test, press UP or DOWN.
Note:
If the crosshead has stopped at a soft limit, the limit condition may be overridden by pressing and
holding UP or DOWN for two seconds.
5.5 Cycling Mode
This mode cycles the crosshead between limits, whichever occurs first. One cycle consists of the
following steps:
1. Crosshead moves to a limit at the specified speed.
2. Crosshead stops for the specified amount of dwell time.