Product

• Trendsetter AL
• Trendsetter CL
• Trendsetter NEWS (except NEWS SA)

Component

Unload table

Symptoms

The unload table moves up before the plate has fully left the table, possibly skewing the plate and causing problems on the processing line.

Cause

The delay for the unload table to move up after the plate has left the plate sensor at the end of the unload table is calculated from the slow exit velocity of the traveler stepper motor. This exit velocity must be slightly lower than the speed of the processor infeed.

If it is not, the unload table moves up before the plate is fully transferred to the processor infeed.

Solution

To give the plate more time to leave the table before it moves up, decrease the exit velocity of the traveler stepper motor in the firmware.

For GMCE/TMCE firmware, adjust the parameter exit velocity.

For MPE firmware, adjust aldrv 2 sr.

Note: The set mhauto PlateGonePostDelay NVS parameter currently does not take effect if the plate has already cleared the sensor by the time the firmware reaches the Wait for plate to leave unload table state.
This will be fixed in a future CR so that this parameter always takes effect.

Technical contact(s)

Frank van Eerdt

Submitted by

Frank van Eerdt

Date submitted

21 Jun 2007