hw:pentaflex-16

Pentacon Pentaflex 16

Various about that camera.

TODO global picture

Motor itself is a KB 3 from VEB Elektromotorenwerk Hartha, Kreis Döbeln.

  • Typ. FM 50 /40
  • Nr. 62/61846
  • Mot. KB 3
  • ??? Hz
  • 11 V (apparently powered 12V)
  • 7.5 A
  • 40 W
  • 6000 U/min
  • F. 7123

Seems to be delivering 0.06366666666666666 Nm of torque.

Brushes are 5x6mm, length is at least 10mm, length of wire 13mm, with a washer on it on the end, hole of ~2mm

Bearings:

  • markings: “ELG”,“TKF”, “2”, open bearing, 19mm OD, 6mm ID, 6mm thick
  • markings: “ELG”, “TKF”, “1”, open bearing, 16mm OD, 5mm ID, 5mm thick





Two identical bearings:

  • no markings, open bearing, 10mm OD, 3mm ID, 4mm thick

Ratios:

SpeedIn (motor, turns)Out (camera, turns)Input RPMOutput RPMFPS
1116000600096
210,6676000400264
310,56000300048
410,256000150024
R10,1986000118019

One turn of the shaft on camera side correspond to one frame.

So with corrected calculations we should get:

FPS“real” RPMGearbox output calculation
9657606000
6438404002
4828803000
2414401500
1911401180
  • hw/pentaflex-16.txt
  • Last modified: 2021/09/11 08:56
  • by dashie