BMA Shield PMC-R Operating Manual
Stagger TCC Stagger group operation allows Auto TCC’s to operate in a defined sequence that will allow constant exposure to the rear AFC. This is achieved by allowing TCC’s to begin depending on adjacent shields slide ram positions. A TCC stagger group consists of 7 adjacent shields. In the example below an operator has programmed the following From-To function.
TCC: STAG
10 > 27
r98 c100 s100
SA-Idle
This From-To operation consists of 2 stagger groups with 4 shields remaining. The first stagger group (10- 16) will begin its sequence with an active TCC in shield 10. The sequence of shield 12 which is the second shield to become active in the sequence is described below. The targets and times may differ depending on the parameter settings.
Stagger Group
Stagger Group
Remaining
1 0
1 1
1 2
1 3
1 4
1 5
1 6
1 7
1 8
1 9
2 0
2 1
2 2
2 3
2 4
2 5
2 6
2 7
1
5
2
6
3
7
4
1
5
2
6
3
7
4
1
2
3
4
•
Shield 10 has retracted past 15% (TCC Stagger stroke). This is the trigger for Shield 12 to begin. Operations in shield 12 are dependent on the status of shield 10. • Shield 12 begins its TCC sequence and retracts to 50% (TCC stagger pause). • Shield 12 pauses until Shield 10 begins its final extension of the slide cylinder. Once shield 10 slide extend output energises then shield 12 slide continues to retract. • Shield 12 reaches 15% (TCC Stagger stroke (trigger for shield 14 to begin) and continues to retract to 2% (TCC ret.sl.ram3). • Operations in shield 14 are dependent on the status of shield 12. • Shield 12 caving shield retracts to 98% (TCC ret.ram). • Shield 12 TCC pauses for 5 seconds (TCC pause). • Shield 12 caving shield extends to 98% (TCC ext.ram). • Shield 12 caving slide begins extension (also trigger for shield 14 to continue retracting). • Shield 12 caving slide extends to 98% (TCC ext.sl.ram). • Shield 12 TCC is now complete. The shields in the Stagger group progress and when shield 7 begins its TCC the next Stagger group becomes active. Operations in shield 17 are dependent on the status of
EM027362-01
Page 56 of 74
