BRUEL & KJAER 2305 - Paper Drive and Speed Controls

Small Large
Figures Figures
mm/sec mm/sec
2000 1000
Unstable
1600
800
and Overshoot
1250 630
1000 500
800
"00
500 250
"0
OJ
315
160
OJ
a.
til
200 100
en
c
125 63
~
80
"0
50 25
31.5 16
16 8
8
"
4 2
2
10 20 50
200 cIs
Lower Limiting
Frequency
161909
Fig. 2.2. Relation between setting of WRITING SPEED and LOWER LIMIT-
ING FREQUENCY to ensure stable function of the writing system. Combina-
tions can be chosen within the hatched area presuming the POTENTIOMETER
RANGE is set according to Range Potentiometer used.
100 mm paper width . For setting of the switch refer also previous item
"Lower Limiting Frequency".
PAPER SPEED is a spring - loaded rotary selector which controls the speed
of the recording paper. Twelve speeds from 0.0003 up to 100 mm/sec are
available. The speeds, corresponding to the inner and outer position of the
Synchronizing Gear Lever X are indicated with large and small figures
respectively. To change the paper spe ed lift the knob, turn it to the
required position and release it again. This selector also controls the speed
of Drive Shaft I, see below and table on page 14.
DRIVE SHAFT SPEED is a spring-loaded rotary selector which co ntrols the
r.p.m. of Drive Shaft II. Ten different speeds can be adjusted independent
of the paper speed, granting an enlarged or compressed pa per scale (hori-
zontal) to be used in the recording. Drive Shaft II can be given a speed
equal to Drive Shaft I, refer Description , page 15 .
24