Jump to content

Recommended Posts

Hi John  A wipe down of the post with oil/light grease is a good idea to keep the motor slide free. Making the wavebreaksrs/baffles sounds like there will be a raid on the kitchen utensil front.  They are usually fitted to the lid under the motor so when the motor is inserted into the jar the breakers are also inserted and the lid seals the jar to avoid spillage when in use.

  • Thanks 1
Link to comment
Share on other sites

5 hours ago, JohnC said:

A follow up question. Does anyone know whether the motor bearings need oiling on these? I have looked through this thread and I have not seen any mention of it. Thanks. 

I had an old one something like yours that I used for very dirty bits and pieces and I never had to do any maintenance, I used it for nearly 30 years and it was very old when I stated.  Don't know if that helps or puts your mind at rest.  

  • Thanks 1
Link to comment
Share on other sites

On 10/4/2021 at 2:43 PM, JohnC said:

A stopgap solution made from an old aluminum pie dish. I think I will try to make some as @nickelsilver
suggests, using wire. Thanks guys 👍

IMG_20211004_094245531.jpg

Be careful with aluminium and ammoniated fluids - I had an issue once when cleaning clock parts in an aluminium tray and it left deposits on some of the parts. Almost like electrolysis. 

  • Like 2
Link to comment
Share on other sites

Aluminium is quite reactive in some situations. In combination with acids or alkalis, I suspect it may cause some interesting side reactions with the zinc or other metals in brass or bronzes. 

This can be turned to your advantage if you want to clean silver, as a solution of baking soda coupled with some aluminium foil will remove tarnish.

I haven't tried this on silvered dials, as there may be some other effects, but I may add it to my list of experiments.

  • Like 1
Link to comment
Share on other sites

  • 1 month later...

Hello guys.  I have a L&R watch cleaning machine that works but the speed control rheostat knob doesn't work well.  Does anyone know of a replacement part for this?  or a good substitute?  I found one by Allied a RHS25RE.  It's a 1 amp 25 Ohm and good to 550 volts.  I know the Master machines are 115 volt at 75 cycles.  Would this work?

I would like to get my machine back up and running again.

Link to comment
Share on other sites

5 hours ago, SonnyBurnett said:

 the speed control rheostat knob doesn't work well.  Does anyone know of a replacement part for this?

Normally, especially on conservative restorations, these are cleaned . You can drop it in e.g. Isopropil alcohol, then blow compressed air into it 

Link to comment
Share on other sites

11 hours ago, SonnyBurnett said:

Does anyone know of a replacement part for this? 

Just like in watch repair a general description of I have a watch and it needs a part just doesn't cut it. We would really need to see what the original part looks like and its characteristics like numbers it has on it then we can pick a replacement because conceivably it's not the only one in the universe they ever used and I seriously doubt most people even have a clue of what that uses unless they ever replace there's providing they even have one.

 

11 hours ago, SonnyBurnett said:

RHS25RE

Then for all of us that don't grasp what that is by just the part number I have a picture and it looks expensive. Now that I can see what it is I think the cleaning device up above is good. 

 

https://www.digikey.com/en/products/detail/ohmite/RHS25RE/824061

 

Link to comment
Share on other sites

12 hours ago, jdm said:

Normally, especially on conservative restorations, these are cleaned . You can drop it in e.g. Isopropil alcohol, then blow compressed air into it 

Well I'd have to un-solder  to take it out, so if I'm going to do that, I'm going to replace it, especially since the brass band around the stem has broken loose.

 

6 hours ago, JohnR725 said:

Just like in watch repair a general description of I have a watch and it needs a part just doesn't cut it. We would really need to see what the original part looks like and its characteristics like numbers it has on it then we can pick a replacement because conceivably it's not the only one in the universe they ever used and I seriously doubt most people even have a clue of what that uses unless they ever replace there's providing they even have one.

 

Well, it's an L&R precision cleaning machine Master model.  The speed control rheostat is the knob in the very front that controls the speed of the motor.  I have it apart at work, I'll take some pics of it but it doesn't have any numbers on it that I remember seeing.

  • Like 1
Link to comment
Share on other sites

15 hours ago, HectorLooi said:

If it is a wire wound rheostat, you don't have to replace it. Just spray it with contact cleaner and work the knob a few times to grind away the oxide layer on the wire coils and it will be fine.

Correct. I was one of these "take everything apart" guys, now with age better wisdom is growing.

Link to comment
Share on other sites

Back in the old days when you did not have a clicker to change channels on your TV, there was a rotating mechanical channel selector to perform this task (and back then, the reason people bore children was so that they could order them to get off the couch and change the channel!!)  The contacts would oxidize and result in intermittent continuity.  They sold "Tuner Cleaner" spray that you sprayed on the contacts as you spun the channel selector.  I cleaned a lot of tuners during my years as a TV tech.

Yes, I agree that a wire-wound rheostat should work perfectly fine after spraying with contact cleaner spray.  There is, of course, the possibility that the wiper is mechanically compromised...in which case cleaner will not solve the problem.

  • Like 1
Link to comment
Share on other sites

On 11/20/2021 at 7:19 PM, HectorLooi said:

If it is a wire wound rheostat, you don't have to replace it. Just spray it with contact cleaner and work the knob a few times to grind away the oxide layer on the wire coils and it will be fine.

Here is the Rheostat.  I can get the machine at work if more pics are needed. I'm an electrician for a hospital so I have it at work for the repair.  There seems to be a brass ribbon soldered to the wiper that is wrapped around the shaft.  You can't see it well in these pics.  I was concerned about creating a short if it touches the wire.

I haven't tried cleaning it yet and I won't mess with it until I solder on a new cord.  All the old rubber insulation has vulcanized and falls off if you breathe near it.

 

20211122_145918.jpg

20211122_145931.jpg

20211122_145936.jpg

20211122_145937.jpg

20211122_145943.jpg

Edited by SonnyBurnett
Link to comment
Share on other sites

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.
Note: Your post will require moderator approval before it will be visible.

Guest
Reply to this topic...

×   Pasted as rich text.   Restore formatting

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.




  • Recently Browsing

    • No registered users viewing this page.
  • Topics

  • Posts

    • That will mean dismantling the gear train, which with 5 pivots to align was a pain. Probably going to have to though. I'm convinced it's something to do with the great wheel. 
    • As far as I know, the only time an epilame treatment has potential drawbacks is when something is rubbing on the treated part w/o lubrication in between creating abrasive dust. That is, I don't believe in the method of "running the watch to make a groove through it first in the pallet stones where the lubrication is then placed". So, I think the rule would be; do not epilame treat parts where rubbing is going on without lubrication. Other than that I don't think we have anything to worry about. That said, I'm not an expert, and I'm always happy to learn more. Has any other repairer than Alex suggested or explained the "making-a-groove" method? My impression is that it's just something he constructed in his mind. I have not perceived it as a generally practiced method. Again, I could be wrong!
    • Post some pictures , some good close ones of the parts you've described. 
    • Ive never used epilame H only information i have read and mentally stored about it mostly from Nicklesilver here and elsewhere ( the fork horns thing ), maybe the residue powder that is removed has some grinding effect ? So probably a good idea to limit its application areas to only the absolute necessary. Yes as far as i know epilame rubs off relatively easy, the technique of running the watch to make a groove through it first in the pallet stones where the lubrication is then placed. This i understand creates the barrier for the lube to sit up to. If i can find a good balance of pros and cons of its use then thats one process i can avoid by using a thixotropic lube on the stones. The epilame i would say allows for a more fluid lubrication to be used that would increase amplitude on low beat movements. The stearic acid powder is extremely cheap, the problem is the fuming process to coat parts, is not selective , the whole part has to treated in this method. If epilame residue can cause wear then thats not good, if I remember the conclusion was not proved entirely just a general assumption between watchmakers. The thread is out there somewhere, the same discussion is also old on a facebook group. Ive never used epilame H only information i have read and mentally stored about it mostly from Nicklesilver here and elsewhere ( the fork horns thing ), maybe the residue powder that is removed has some grinding effect ? So probably a good idea to limit its application areas to only the absolute necessary. Yes as far as i know epilame rubs off relatively easy, the technique of running the watch to make a groove through it first in the pallet stones where the lubrication is then placed. This i understand creates the barrier for the lube to sit up to. If i can find a good balance of pros and cons of its use then thats one process i can avoid by using a thixotropic lube on the stones. The epilame i would say allows for a more fluid lubrication to be used that would increase amplitude on low beat movements. The stearic acid powder is extremely cheap, the problem is the fuming process to coat parts, is not selective , the whole part has to treated in this method. If epilame residue can cause wear then thats not good, if I remember the conclusion was not proved entirely just a general assumption between watchmakers. The thread is out there somewhere, the same discussion is also old on a facebook group. If its a potential problem for amateurs to use then i would prefer not to take the risk .
    • Following on from my question about identifying screws in the AS2063 movement that basically fell out of the case in bits, I’m pleased to report that I’ve got it all back together, and the movement is running pretty well.    But… There’s something wrong with the keyless works and hand setting. It’s fine in winding and quickset date position - these work - but in hand setting position winding the crown turns the whole gear train.  I don’t really understand how it’s meant to work. It doesn’t have a traditional friction fit cannon pinion.  The second wheel is unusual with a pair of smaller pinions on it, which seem to interact with the barrel and the motion works.    Could this be the problem? I must admit I just cleaned it and popped it in place when reassembling the gear train. I’ve lubricated the pivots but didn’t do anything to the extra bits on the second wheel.    Does this make sense and is anyone able to figure out what I’m doing wrong? Thanks in advance, as always.    ETA - the parts list calls it the Great Wheel, not second wheel. 
×
×
  • Create New...