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marksl

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Reply with quote  #1 
What are people using for a telescopic pole with a mount for the accelerometer which can swivel for different mounting angles. Is there anything on the market that is purpose built?

I just found some information on the XtendaPole from Spectrum Instruments which is exactly what I'm looking for. Anyone using one of these?
Noknroll

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Reply with quote  #2 
Check this out......

http://www.machineryanalysis.org/post/extended-reach-for-accelerometers-7917991?highlight=extension+pole&trail=15
marksl

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Reply with quote  #3 
I got a price on the XtendaPole................. I think I'll make my own lol
DDane

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Reply with quote  #4 
Seasons Greetings,

 I got one of the IMI telescoping poles and am happy with it as I don't have time to cobble one together  and the safety folks at my facility would be a pain about a home made one. I like the IMI offering as I have a number of Motors 10-12 feet above the floor and Ladders can be hard to come by and here again Safety folks are a pain.


                                        Regards, Dave Dane







IMG_2768.JPG IMG_2769.JPG
marksl

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Reply with quote  #5 
Quote:
Originally Posted by DDane
Seasons Greetings,

 I got one of the IMI telescoping poles and am happy with it as I don't have time to cobble one together  and the safety folks at my facility would be a pain about a home made one. I like the IMI offering as I have a number of Motors 10-12 feet above the floor and Ladders can be hard to come by and here again Safety folks are a pain.


                                        Regards, Dave Dane 

Hi Dave,

Thanks for the information on the IMI extension pole. I haven't seen that one. I've just sent them an email for pricing


JuddJones

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Reply with quote  #6 
I have used that one for a couple years. I don't hate it, but am planning to build a better one someday soon.
marksl

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Quote:
Originally Posted by Big J
I have used that one for a couple years. I don't hate it, but am planning to build a better one someday soon.

What don't you like about it?
RustyCas

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Reply with quote  #8 
Just looking at it, what I don't like is the accelerometer mount looks fairly rigid.  With that small, 2-rail magnet, it's going to be hard to hold the pole so that the magnet actually makes good, solid contact.  

The one I use (and made), has a spring joint between the mount and pole, and I use a large, powerful magnet, so when the magnet "connects" you feel it, and can move the pole slightly without affecting the mounting of the accel. Also you can change the "angle of attack" on-the-fly, which makes it easier to get a good mount. I don't understand the "safety" concerns... the one I made is all bolted together, so nothing is going to come off or pull free, and the pole is fiberglass, so electrically isolated.  What more would a safety guy be concerned about?

It only takes about 30 minutes to make once you have the parts in hand, all off-the-shelf at a good hardware store.



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Beatnik

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Reply with quote  #9 
Quote:
Originally Posted by RustyCas
Just looking at it, what I don't like is the accelerometer mount looks fairly rigid.  With that small, 2-rail magnet, it's going to be hard to hold the pole so that the magnet actually makes good, solid contact.  

The one I use (and made), has a spring joint between the mount and pole, and I use a large, powerful magnet, so when the magnet "connects" you feel it, and can move the pole slightly without affecting the mounting of the accel. Also you can change the "angle of attack" on-the-fly, which makes it easier to get a good mount. I don't understand the "safety" concerns... the one I made is all bolted together, so nothing is going to come off or pull free, and the pole is fiberglass, so electrically isolated.  What more would a safety guy be concerned about?

It only takes about 30 minutes to make once you have the parts in hand, all off-the-shelf at a good hardware store.




The head can rotate: https://www.imi-sensors.com/contentStore/mktg/IMI_Downloads/IMI-080A22X_LowRes.pdf

I like mine (the IMI one) but yes I could probably build one too.

Safety "concerns" are the main reason I got this one instead of making one: There is a safety connector on it and brand equipements are a much easier sell to safety people.

The safety concerns come from the fact that we use it to go beyond safety guards on moving machines. This goes against laws and norms. Even if there is no danger, you must make a procedure that include special precautions to make it "ok". Using the IMI pole with the safety connector is the main precaution in my procedure.




Danny Harvey

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Reply with quote  #10 
"What more would a safety guy be concerned about?"

Dropping it. Sticking it into a machine. Falling because you are looking up instead of where you put your feet. There are others but they are less legitimate.

Some places will allow it, some will not. I use it on a big, multi train gearbox and you have to be very careful on the side between the motors and gearbox which also has the 4 output shafts. Some are long horizontal reaches that could present some sort of safety hazard if dropped or misdirected. In this location I'm lucky because the Safety Coordinator is also my contact for the last 20 years, the Manager of Reliability. (*I just remembered that I did mount accels on the three points that I couldn't safely access with a pole.)

He came out, watched what we do and approved it on the spot.

Unfortunately for the rest of you guys, there's only one of him and I've got him. 

Be careful with those things. There are plenty of ways to do harm with them and like everything else, they have to be used with care. And if the safety guy won't allow it, then don't use it just because he's not looking. Go through the established procedures to get a variance if they exist or mount sensors* if it is cost-justified but go by the rules. 

And Rusty's point about the lack of a swivel is not just a concern about the quality of the data.  Without a swivel, you tend to move yourself around to try to make up for the lack of flex on the other end which can make the other concerns worse.
JuddJones

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Reply with quote  #11 
Quote:
What don't you like about it?


The swivel was clunky and not positive. The accelerometer never stayed tight in the rubber grommet. If I used a large strong magnet the accelerometer would sometimes stay stuck and the grommet would come out of the pole and be stuck to the machine. Also the swivel stripped out and is now replaced with a through bolt.
RustyCas

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Reply with quote  #12 
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There is a safety connector on it


Are you talking about on the cable?  I always kind of snicker at those, because if your cable ever gets hung in a rotating shaft, it's going to snap instantly (unless it's a very slow shaft).  Not a bad thing to have, but it's just a cable and everybody offers that on cables.

I don't use mine that often. Only for hard to reach areas.  I don't use it to go inside guards, etc, because as Danny points out, it's not safe.  If I can't get to it, I don't read it, and I tell them so.  If they want me to mount accels and bring a cable out, I do.  But points that are inaccessible are not my problem.


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RustyCas

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Reply with quote  #13 
The joint on the head I use is actually flexible enough that the angle will change as the magnet "plops" onto the surface, so self-adjusting.  You can vary the tension with the knob and/or different springs.  I have it set so that it remains stationary as I lift the accel into position, but then the angle can be changed very easily with only slight pressure.  Hate to send you to that "other" site, but here is a link:  http://www.maintenance.org/topic/reach-pole



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Vibe-Rater

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Reply with quote  #14 
totally agree with Rusty on the "flexible enough" front. That ability for the accelerometer to "find" / "grab" (or plops as Rusty calls it) its own seat is extremely valuable in my opinion. So the trick is to find a mount which is flexible for small angle changes but stable over larger ones. So a nylock nut is not good enough, and a wingnut only just.  Electricians tape softens, especially with heat on a paper machine,  to provide the small angle changes but not large ones. And the fulcrum needs to be extremely close to the end of the extension pole. rgds
JoeVibe

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Reply with quote  #15 
I've made a number of these in varying lengths over the years and they work very well. We use them mostly for reaching taller chillers and into cooling towers without climbing or entering "confined spaces".  Ext pole 2.jpg  Ext pole.jpg 


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