Who's Online Now
0 registered members (), 15 guests, and 0 spiders.
Key: Admin, Global Mod, Mod
March
S M T W T F S
1 2
3 4 5 6 7 8 9
10 11 12 13 14 15 16
17 18 19 20 21 22 23
24 25 26 27 28 29 30
31
Newest Members
Prairieelevator, Robot Rob, Montkone, Jevans, Clayshooter
8395 Registered Users
Forum Statistics
Forums13
Topics6,468
Posts36,656
Members8,395
Most Online117
Jan 16th, 2020
Previous Thread
Next Thread
Print Thread
#26569 - 04/15/19 05:03 PM Miprom 21 A/C in overhead  
Joined: Jan 2015
Posts: 117
Turbo6 Offline
member
Turbo6  Offline
member

Joined: Jan 2015
Posts: 117
Chicago
I have a 4 car low rise geared group, very often the cars end up on the top final with a “38 nts” fault. We have replaced the entire brake circuit components and i recently slowed the cars down 75fpm with no good results. The very odd thing is that nobody ever has been entrapped in cars, this has been an issue for about 6 months on all of the cars. Any ideas fellas?

#26570 - 04/15/19 06:00 PM Re: Miprom 21 A/C in overhead [Re: Turbo6]  
Joined: Jan 2014
Posts: 736
Rolly Offline
old hand
Rolly  Offline
old hand

Joined: Jan 2014
Posts: 736
Traction or Balance Problem? Try putting about 400 lbs of weight on car top and see if it goes away. If it does you have a balance problem. That was very common.

#26574 - 04/15/19 06:25 PM Re: Miprom 21 A/C in overhead [Re: Turbo6]  
Joined: Feb 2013
Posts: 757
john jay Offline
old hand
john jay  Offline
old hand

Joined: Feb 2013
Posts: 757
ohio
Another cause was the ETS Switch interfered with an NTS Stop. Try moving the ETS a coulpe of inches closer to the floor. To see if you can make a good NTS stop. Run a buffer test without jumpering out the NTS Switches. If the car doesn't stop correctly, you either have the above problem, or the NTS Switch voltages are not adjusted correctly.

#26579 - 04/15/19 09:21 PM Re: Miprom 21 A/C in overhead [Re: Turbo6]  
Joined: Dec 2015
Posts: 1,529
Indirtwetrust Offline
ElevatorPractitioner
Indirtwetrust  Offline
ElevatorPractitioner

Joined: Dec 2015
Posts: 1,529
Local 18
There is a software fix for this. Call Cetek and ask for target chasing software fix. This is only on AC drives, usually happens in the middle of the night, never anyone trapped. Car dispatches itself to some non-existent floor.

#26580 - 04/15/19 09:25 PM Re: Miprom 21 A/C in overhead [Re: Turbo6]  
Joined: Dec 2015
Posts: 1,529
Indirtwetrust Offline
ElevatorPractitioner
Indirtwetrust  Offline
ElevatorPractitioner

Joined: Dec 2015
Posts: 1,529
Local 18
Of coarse like with any Miprom 21 going in the overhead with 38 errors you should do an NTS and ETS test to make sure they both work correctly. But if there is no problem there, call Cetek!

#26582 - 04/15/19 11:31 PM Re: Miprom 21 A/C in overhead [Re: Turbo6]  
Joined: Jul 2013
Posts: 198
NewMech Offline
member
NewMech  Offline
member

Joined: Jul 2013
Posts: 198
We had this for years on a DC mod job. Same thing, cars in the overhead or sometimes the pit and never an entrapment, new software did the trick.

#26589 - 04/16/19 05:18 AM Re: Miprom 21 A/C in overhead [Re: Turbo6]  
Joined: Oct 2012
Posts: 262
Philly Offline
enthusiast
Philly  Offline
enthusiast

Joined: Oct 2012
Posts: 262
You can see that the car drives itself into the final limits if you check the 3 digit mode/region/direction capture on service tool. That software fix was sent out to MOST of the jobs by now, it was 15ish years ago i think when that came about. Cetek is gonna rape you for it if you're a competitor of Kone. Take vaseline

Heard about a balance issue, as i think Montgomery had those at 40% from factory, but i swear that every time i took a call on the mysterious final, the direction was driving towards the terminal.

It could be a ton of different things really. Brake panel and M contactor aux's are a common start. Could be a pilot relay in drive, a sloppy encoder, a door lock bounce, etc. Gotta have tool to watch IO's to figure out

#26590 - 04/16/19 05:24 AM Re: Miprom 21 A/C in overhead [Re: Turbo6]  
Joined: Oct 2012
Posts: 262
Philly Offline
enthusiast
Philly  Offline
enthusiast

Joined: Oct 2012
Posts: 262
Start with replacing the relays for slowdown switches on NTS board with bifurcated ones. They are operating on 1 to 8volts. Gotta adjust those pots very carefully. They usually don't wander that bad after setup. Did you set the MSU 8volt?

#26595 - 04/16/19 01:55 PM Re: Miprom 21 A/C in overhead [Re: Turbo6]  
Joined: Jan 2014
Posts: 736
Rolly Offline
old hand
Rolly  Offline
old hand

Joined: Jan 2014
Posts: 736
Start with the 400 lbs on car top.. it's a hell of a lot cheaper then the post above this.

#26936 - 05/15/19 09:40 PM Re: Miprom 21 A/C in overhead [Re: Turbo6]  
Joined: Jan 2015
Posts: 117
Turbo6 Offline
member
Turbo6  Offline
member

Joined: Jan 2015
Posts: 117
Chicago
Thanks fellas, I’m going to try the weight issue and get a price from for software. There isn’t the terminal switch board on these with the pots to adjust. I have replaced every relay in brake circuit along with relays involved in ets circuits along with main board behind relay board that has the smaller micro relays on it.

#26939 - 05/15/19 11:20 PM Re: Miprom 21 A/C in overhead [Re: Turbo6]  
Joined: Feb 2013
Posts: 757
john jay Offline
old hand
john jay  Offline
old hand

Joined: Feb 2013
Posts: 757
ohio
Adding weight to the car top may sound like a quick fix. However as a QEI Inspector, I would write this up as a deficiency, and shut the car down. You are changing the the capacity of the elevator.

#26941 - 05/16/19 12:42 AM Re: Miprom 21 A/C in overhead [Re: Turbo6]  
Joined: Dec 2015
Posts: 1,529
Indirtwetrust Offline
ElevatorPractitioner
Indirtwetrust  Offline
ElevatorPractitioner

Joined: Dec 2015
Posts: 1,529
Local 18
I tend to agree with John Jay, never liked the idea. Just get some test weights out and check the counterweighting. It should probably be 40%. If it’s balanced correctly, just sell the software to the customer.


Photo Gallery
PECCO PH5000 Overspeed Governor
Drive sheave
The best helper.
Rotary Oildraulic
Old Otis badge.
Brakes,Coil,Rotor
KONE MX10 repair tool kit
Powered by UBB.threads™ PHP Forum Software 7.6.0
Page Time: 0.027s Queries: 15 (0.006s) Memory: 2.7338 MB (Peak: 2.9515 MB) Zlib disabled. Server Time: 2024-03-29 05:43:04 UTC