The A6628SEDT is a PLCC 44 packed dual motor driver, running in my old Epson printer.
The idea is to controll the chip by some Arduino and make it print PCBs, like these guys did.

The datasheet for the chip is absent, but thes is connection diagram on the printer’s Service Manual.
It seems the chip is dual version of some Allegro motor controllers, having two indpendent data channels and dual H-bridges (or kind of).
According to the schemacics, paper feeder is controled via data channel 0 on pins 28, 29 and 30 (CLK, Data, Strobe accordingly). The carriage motor is controlled via data channel 1 on pins 40 (CLK), 38 (Data) and 39 (Strobe). Read the rest of this entry »