Supply Side Mechanics - AGFA Avantra 36/44 Service Manual

Avantra 36/44 Service Manual
The media transport system handles:
• Web fed form
• Red sensitive paper
• Film
• Plate
The media feeds through the transport system by means of a nip and one of two
rollers on the supply side (one for each supply cassette). The nip and roller push
the media through an entrance platen into the supply punch module then down
onto the drum surface. The inner sleeves, mounted to the carriage assembly and
aligned concentric to the drum, provide an external surface that forms a tunnel to
confine the media during the feed operation. The feed continues to rotate the
drum. The media travels through the take-up punch module until it reaches the
open take-up nip rollers. The take-up nip rollers close and start pulling the media.
The supply motor drives approximately 5% faster in torque mode to keep the
media compressed firmly against the drum surface.

2.14.1 Supply Side Mechanics

The supply side mechanics consist of the following components:
• Supply drive DC gear motor with encoder for loading/unloading media
• Two DC gear motors for rewinding media into the supply cassettes
• DC gear motor for A/B spindle selection
• Three drive rollers for loading and unloading media
• Two spindle sensors
• Supply jam sensor
• Supply media present sensor
The following sections describe each of these submodules in detail.
2.14.1.1 Supply Drive DC Gear Motor with Encoder
This motor loads and unloads media into the system from either spindle A or spin-
dle B. The motor drives in one direction to load media from spindle A and in the
reverse direction to load media from spindle B.
2.14.1.2 DC Rewind Motors
This motor rewinds the media back into the supply cassette. They are also used as
forward assist motors to help the supply motor during loads and media feeds. The
system has two separate motors, one for each supply cassette.
2.14.1.3 DC Spindle A/B Gear Motor
This motor nips the center (drive roller) to the top (spindle A) roller or bottom
(spindle B) roller.
2-26 Functional Analysis