Elevator Forum

If not mistaken you can look at Armature current feedback on the DSD412. If the car is NOT running I would expect to see NO armature current feedback....

If big gearless motor....Check to see if the interpole are rocking and shorting out against a motor field connection. Very similar to what you're talk...

I hear ya E-man. I don't know how young helpers are trained, because everywhere I look, I don't see any....Times do change..When I started, we turned ...

Vic's right...Clad Cut = cutting a trace on a PC board.

Yep...20 year old equipment..What was once military spec on all those triacs, optos etc..has degraded..They never did like it hot, but degradation ove...

If you're really interested in doing upgrades for codes...Join LinkedIn and get Mark Sy's full profile..Degreed EE, 40 some odd years and the elevator...

The only "Stupid" question is the one not asked....

When you can't get satisfaction anywhere else...These guys deliver..

On a trip to NYC I got to tour the WTC while Swift CEC was doing a mod..Machine rooms control either A Base or B Base, and if memory serves me correct...

Great post Robert....

Very cool...Big old knife switch with a rope tied to it for a main line???(Along with a big old bakelite pole to push the knife switch in???)We had 50...

the original host/forums/ubbthr...h=true#Post2788

"Solid and in one hell of a State"...LOL..

Hard part is getting them scanned in..Once in a word or pdf, you can do a search function, which saves lots of time...