HP97 The journey begins

[Jonas Sandstedt]

Hello,

Regarding the problem with a printhead end position not being detected, I think the HP-97 solution with a bi-directional motor is somewhat rare. The HP-82240A/B for example, being equipped with the Seiko MTP-201 printer, works like the HP-19c where the motor is uni-directional and the printhead moves from the left to the right and so on while the motor is running in one direction. The only other calculator I have stumbled across that has a thermal printhead with a bi-directional motor is the Canon FP-11P, and just as for the HP-97, this printer only prints the line as long as necessary, where paper feed is the shortest line. I suspect that this does not help, but can be regarded as some superfluous information for the curious.

best regards
Jonas