Westinghouse solid state motor drive (TTL) problemgreenspun.com : LUSENET : Elevator Problem Discussion : One Thread
Westinghouse TTL solid state motor drive (1985 vintage) erratic operation. on occasion car blows through floors, other times it comes in ok (same floor) Replaced complete set of boards, didn't help. Checked pulse counts, some floors are off as much as 15 counts, then a few floors later there right on. Can sure use some help on this.
-- Mike DiNocenza (email@example.com), December 27, 2002
got an encoder? coupling tight? check all connentions on motor and drive in back sounds like a loose wire
-- jag (firstname.lastname@example.org), January 04, 2003.
are you still working on TTL? Do you have the new or old leveling board assy? scott
-- Scott Werner (email@example.com), May 18, 2003.
check d29 mike im sure ya know who this is lol
-- mike r (firstname.lastname@example.org), September 09, 2004.