Diablo 630

Several technologies were introduced to enable this quality and speed: A related model, the Diablo 1620, includes a keyboard and strongly resembles a slightly overgrown Selectric typewriter.

Unfortunately for a typist (in either role), the daisy wheel mechanism hides the area just printed.

This made checking the copy for errors a bit more awkward and slow than on actual typewriters or on Selectric-based terminals.

The same mechanism was used in Xerox's 850 display typing system and 860PDS word processor, and was also sold to OEMs.

[6] This was so pervasive that at least one company lived by testing printers for full Diablo 630 compatibility.

Metal daisy wheel for Xerox and Diablo printers
Diablo 630 with mounted sheet feeder, Model 630, production year 1981
Diablo 630 without sheet feeder, Model 630, production year 1981