I’m having a problem with a power drop on the lateral and longitudinal brakes. What am I missing here?
The system has a remote power supply mounted on the wall and is supplying 30.2 volts to the hanger. However, when the longitudinal brake is activated it causes the power to drop 1.5 volts, and the brake will not energize. There is approximately 28.8 volts across the coil when energized. This is a re-installation of a 2002 tube support (CMT) and the original brakes would not operate at all. Tried connecting both of them directly to the power supply and they still wouldn’t operate. Just not enough force to pull the brake pads back, but the coil does have some power or energy in both locations. Ordered some used ones that was supposed to work! They wouldn’t work on the CMT, but would work when connected directly to the power supply. They looked old and I’m guessing that the coil is weak on both of them as well. However, the supplier insisted that they were operational, and they were. They just would not operate when connected to the CMT. These coils have a 24VDC operational voltage. Do they have to have 30.2 volts operate? Or it the 30.2 volts provided in order to maintain its ability to operate over a longer period of time as the coil gets weaker? I’m missing something here just not sure what.
Help and comments are appreciated! tj.walker@att.net
Eliminate the power supply as the problem first,...simply put an amp meter in series with the load ( brake coils )and see if it is beyond the current rating of the power supply.
If the power supply is operation normally, then adjust/reduce the gap between the coil and pull bar. We have found that this is a critical adjustment since Siemens has been incorporating friction braking systems on the aluminum rails. Please Note..Do not use WD-40 on the rails!
I do not believe that the voltage drop (of 1.5V) would be an issue for the functionality of these brakes. After all, they are just solenoids (not very complicated devices...)
However, the adjustment of the brakes position is very important! They fail to brake properly (or at all...), if they are not well adjusted.
To adjust them, you normally need a couple of "service tools", normally shipped with the units by Siemens.
The adjustment procedure can be quite tricky and many times you have to do it over and again a few times, until you have satisfactory results.
I am attaching, by email the part of the adjustment instructions, that describes the adjustment procedure.
I believe that (if their coils are not burnt...) the brakes will work after a proper adjustment. I do not see why not...
Hello Ralph, I will be contacting Dotmed and flagging this account and the information came from a Siemens engineer that has over 28 years of respected work in the bio/clinical field, and is a good friend of Ray D. and Bob P. and my friend as well.
We supply high-quality refurbished and used imaging equipment and parts to hospitals, imaging centers, and brokers worldwide. We pay top dollar and offer installation, deinstallation, service, and transport. Se habla español info@medilabglobal.com
Tom Walker
Siemens Multix Top Brake Problem
May 21, 2013 09:55
I’m having a problem with a power drop on the lateral and longitudinal brakes. What am I missing here?
The system has a remote power supply mounted on the wall and is supplying 30.2 volts to the hanger. However, when the longitudinal brake is activated it causes the power to drop 1.5 volts, and the brake will not energize. There is approximately 28.8 volts across the coil when energized. This is a re-installation of a 2002 tube support (CMT) and the original brakes would not operate at all. Tried connecting both of them directly to the power supply and they still wouldn’t operate. Just not enough force to pull the brake pads back, but the coil does have some power or energy in both locations. Ordered some used ones that was supposed to work! They wouldn’t work on the CMT, but would work when connected directly to the power supply. They looked old and I’m guessing that the coil is weak on both of them as well. However, the supplier insisted that they were operational, and they were. They just would not operate when connected to the CMT. These coils have a 24VDC operational voltage. Do they have to have 30.2 volts operate? Or it the 30.2 volts provided in order to maintain its ability to operate over a longer period of time as the coil gets weaker? I’m missing something here just not sure what.
Help and comments are appreciated! tj.walker@att.net
to rate and post a comment
Ralph Frizzle
re: Siemens Multix Top Brake Problem
May 22, 2013 10:02
Eliminate the power supply as the problem first,...simply put an amp meter in series with the load ( brake coils )and see if it is beyond the current rating of the power supply.
to rate and post a comment
klaus boehmdorfer
re: re: Siemens Multix Top Brake Problem
May 25, 2013 09:18
yes, I think the problem is in the power supply
to rate and post a comment
Ralph Frizzle
re: re: re: Siemens Multix Top Brake Problem
May 28, 2013 10:32
If the power supply is operation normally, then adjust/reduce the gap between the coil and pull bar. We have found that this is a critical adjustment since Siemens has been incorporating friction braking systems on the aluminum rails. Please Note..Do not use WD-40 on the rails!
to rate and post a comment
Bill Masters
re: Siemens Multix Top Brake Problem
June 03, 2013 02:39
Hello Tom
I do not believe that the voltage drop (of 1.5V) would be an issue for the functionality of these brakes. After all, they are just solenoids (not very complicated devices...)
However, the adjustment of the brakes position is very important! They fail to brake properly (or at all...), if they are not well adjusted.
To adjust them, you normally need a couple of "service tools", normally shipped with the units by Siemens.
The adjustment procedure can be quite tricky and many times you have to do it over and again a few times, until you have satisfactory results.
I am attaching, by email the part of the adjustment instructions, that describes the adjustment procedure.
I believe that (if their coils are not burnt...) the brakes will work after a proper adjustment. I do not see why not...
to rate and post a comment
Pandoros
re: re: Siemens Multix Top Brake Problem
June 03, 2013 04:57
Hey Tom, maybe you should ask for credentials and a background check from your adviser's to qualify the value of the reply.
to rate and post a comment
Bill Masters
re: re: re: Siemens Multix Top Brake Problem
June 03, 2013 05:25
Hello Ralph, I will be contacting Dotmed and flagging this account and the information came from a Siemens engineer that has over 28 years of respected work in the bio/clinical field, and is a good friend of Ray D. and Bob P. and my friend as well.
to rate and post a comment