Jobo cpp 2



Keywords: large format cameras, large format lenses, swordfish camera, darkroom, stark darkroom, c-41 chemistry, vds camera, gibellini folding cameras, stenopeika, processors, polaroid 8x10, impossible 8x10 instant film (polarid 8x10), reels, zine, mod54, holga/diy, cpp3, expert drums (3000 system), 1500 uni tank system, 2500 multitank system, 2800 printdrum system, tank and reel combos, tank cores, funnels, caps and lids, jobo lift (#4072 \ #4062), spare parts, jobo storage bottles and beakers, papersafe, publications, imacon/hasselblad scanners
Description: This article will discuss the significance of the Jobo CPA2 and CPP2 machines serial numbers. &nbs...

The original CPA/CPP design dates back to the early ’80s. Over the years, Jobo introduced new, larger tanks to its lineup, eventually replacing the old non-modular drums with the all-modular 1500 and 2500/2800 system tanks. As capacities grew, so did the tanks.

Large-capacity tanks were offered for high-volume users in commercial operations who were equipped with the larger ATL machines. Those machines were designed to handle larger loads, with stronger motors and supporting electronics.

To enable CPA/CPP users to use the larger-capacity drums and then the Expert drums, the design underwent several minor adjustments over the years. A detailed description of the changes can be found in the Jobo publication below.

The final and most major changes that influence the longevity and reliability of the CPA/CPP system were made in the last production model design, which specifies an all-new motor and a power circuit-board design installed in all machines starting with SN 22001. A new rotation motor, the same as used in the large commercial ATL machines, coupled with a more powerful DC support board, increased the capacity of the CPA/CPP system to that of the larger ATL machines, thus keeping the Expert drum’s extra load well within the maximum load limit of the motor. The same motor and similar design are still used today in the CPP3.

The new motor features a new-style conical drive shaft, with a screw tap to lock in the main drive cog. This is an improvement over the old collet clamp design and it makes all late production model machines easily recognizable because they have a hex screw holding on the cog instead of the flathead screw used in all other machines.

Newer systems, like the 3000 series EXPERT Drums, require increased strength in the rotation motor circuit. This extra load can make the rotation speed of the tank or drum sluggish or make it seem to struggle with heavier loads. The 3000 series EXPERT Drums create the heaviest possible load for the rotation motor circuit.

2nd Upgrade: The rotation motor circuit was strengthened to accommodate larger loads, that is, 3000 series EXPERT Drums.

3rd Upgrade: A stronger rotation motor (the same as in the ATLs) was introduced and the rotation-motor circuit was strengthened to accommodate the new motor.






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