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Grabber Function Test
The grabber function test will help to isolate mechanical and electrical failures of the grabber assembly.
The two errors most likely to occur during this test are:
• Grabber Stepper Index Error - the software is detecting that the grabber is not in a safe posi-
tion when the needle begins to come down.
• Grabber Timeout Error - the sensors fail to detect home within the allotted amount of time
programmed into the firmware and software.
Test Procedures:
1. Inspect the grabber blade assembly for obstructions or damage.
2. Turn the machine ON and open the Bravo OS.
Figure 1 - Steppers Menu
3. Before doing the function test, “step” the motor through its function and check for proper grab-
ber adjustment. The grabber blade should touch the velcro on the upper trap assembly, but it
should not depress the loops on the velcro pad. The grabber blade should also be completely
parallel to the upper and lower traps. To “step” the grabber stepper motor incrementally through
its cycle, click on the “Tools>Maintenance” menu in the Bravo OS, select the “Steppers” tab and
click the “Step>” button in the grabber column, observe the movement and click it again for the
next step. Repeat this to observe any obstruction or misadjustment. STOP if you observe any ob-
struction or adjustment required in the grabber assembly. Use the procedures referring to adjust-
ment prescribed in “Grabber Blade Replacement” to adjust the grabber assembly.
4.
If there is a failure in the “stepping procedure” or you find the problem, repair the defect or make
the required adjustments and start this test again from the beginning.
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