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(Draft E2150) For Form 3738
SET MARUFFs
SET LWLFF
See figure V-9. The MARU FFs will be set by delta MR at the start of the electronic cycle in the write ledger position.
The stop position where the write ledger is initiated must be pinned with a lane write ledger pin (LWL). The L~CC5.CLK signal sets the LWLFF.
SET CRG MTRFF The LWLeCC5eCLK signal sets the CRG MTR FF.
ENERGIZE CRG MTR RELAY The CRG MTRFF activates a SD to energize the CRG MTR RELAY which complete the circuit to the CRG MTR. The CRG MTR supplies power to drive the paper handler mechanism.
SET PROG CAM FF The Prog Cam FF is set by LW~TCIO.NOT ERFFeCCleCLK signals.
The FF is set at 2200 of the console cycle in the write ledger position.
ENERGIZES PROG CAM SOL The Prog Cam SOL is energized by the Prog Cam FF signal and a SD. The program shaft will turn to 2880 • This will lower the
read/write heads to the stripes and allow the pressure rolls to grip the form. CC2 will become high for a short time at 2500 of the Program camshaft cycle.
Rl RESET RESET COUNTER RESET FF9X
RESET FF3X
CC2 provides a Rl reset at 2500 of the camshaft cycle.
CC2 and CLK resets the counter flip flops.
FF9X is reset by CC3ICLK-NOT FF9X if it is set, in preparation for writing the sync pulse.
FF3X is used to end the write operation and must be reset at the start of the operation.
RESET SRXFFs and SRYFFs These flip flops are reset by CC2 as a safety precaution.
RESET FROG CAM FF CC2eNOT EJFFeCLK will reset the prog. cam FF at 2500 of the camshaft.
(Draft E2150) For Form 3738
Sec. V
LF WRITE AMP 1200 usec DMV
FF4 REVFF turn on the write amplifier.
The trailing edge of the NOT FF4 signal triggers the 1200 usec DMV.
When the LF write amplifier is turned on, the current in the LF head is re-versed. This reversal of current causes changes in the magnetism in the air around the head. These magnetic changes are large enough to be picked up by the X read head and cause setting of the 6 ms resettable DMV. If the LF pulse is written 6ms or more before the X head starts reading data pulses, this is indicates in the signals of Figure V-7, the first data pulse is recognized as the sync pulse and form reversal takes place. The purpose of the 1200 usec DMV is to prevent the disturbance in the X head, due to switching the LF head current, setting the 6ms DMV. Data in the X stripe must be read as an indication of the position of the form so that the sync pulse can stop from feed and reverse the form travel. Once reading has started, a lapse of 6ms between pulse indicates the end of data and the next pulse read will be the sync pulse. The 6ms DMV is a resettable DMV and is reset by each data pulse read. At the end of data, the 6ms DMV will time out and set FF16.
SET FF 16
SET SS FF
FF4eREVFFeNOT FF16eAMPX reset 6ms DMV at each AMPX pulse. 6ms after the last pulse the 6ms DMV output will become high. This signal and a clock pulse sets FF16. FF16 is an indication that the next pulse will be the sync pulse.
READ AMPxeFF16ecLK Sets the SSFF. SSFF gates the BOLP to stop for travel. SSFF is reset by RESET PDFF sig.
RESET PDFF Sig. SSFF BOLP cause the reset PDFF signal to be high.
RESET SL (Rl) RESET PDFFeREVFF triggers a PS to cause an Rl reset pulse. This signal resets the FF's used to stop the paper drive.
RESET COUNTERS The counter FFvs are reset by Reset PDFF signal and REVFF. A count of lines to find L-2 must be made as the form is fed out.
(Draft E2l50) For Form 3738
Sec. V BURROUGHS - SERIES E2l50 INSTRUCTION BOOK Page 27
SET 9XFF The 9XFF is set by USMVFF-PDFF'NOT REVFF_NOT L-2FF.NOT 9XFF_CLK. WS.
Sec. V BURROUGHS - SERIES E2150 INSTRUCTION BOOK PAPER SPEED CHECK
370usec ' o o r - - - - .
DMV USMV
FF
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FF
FF
USMVFF
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(Draft E2150)
,
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-RS ER FF
Page 29
ERFF
RESET CTR
SYNC MV SYNCFF
For Form 3738
SET FF
SET SYNC FF
If a BOLP occurs while the counter is at 27, 28 or 29, the FF will be set. This indicates that the form is traveling at an acceptable speed.
SYNC FF is set by FF.USMVFF.NOT SYNC FF being low inhibits the next STEP CTR pulse to prevent further counting.
SYNC MV A SYNC MV pulse is gated out by SYNC FF being high.
RESET FF and SYNC FF The SYNC MY pulse resets FF and SYNC FF.
RESET COUNTER The counter FF's are reset by SYNC FF and WLFF.
An acceptable form speed has been recognized and the circuits reset for the count between the following BOLPs. If for some reason, the counter is not at 27, 28 or 29 when the BOLP occurs, it indicates that the form is not moving at the desired speed. It may be either too fast or too slow. If FF and SYNC FF are not set, the counters will continue to advance with each USMVFF pulse.
SET ERFF RESET WLFF
A count of 32.STEF CTR.NOT EJFF.CLK sets the Error (ER) FFo ERFF.CLK resets WLFF. This stops the writing of pulses on the stripes. Data remains in memory and another attempt to write
can be made in the write error correction position. This operation will be discussed later. The write light will be on and the machine locked until the error correction procedure is followed.
RESET WLFF The WLFF will be reset by the last complement pulse (CF) written on the ledger, the FF3X and CLK signal. FF3X is set by the logic to cause the start read data and complement pulses to be written.
SET FROG CAM FF When the form is fed out of the carriage, the NOT FPS signal will be high. NOT FPs.cc6.L-2FF,CCl.CLK will set the PROG CAM FF.
(Draft E2l50) For Form 3738
Sec. V BURROUGHS - SERIES E2150 INSTRUCTION BOOK Page 31