Date   

Re: Mach2 vibration & noise issue from the RA axis

Dale Ghent
 

I think it's great that Roland is here and engages with people and their issues. It's rarity in this industry. I also think it's a bit uncouth to ignore the existing support people at A-P, who are also quite knowledgable and certainly capable, and instead beg for his help directly.

On May 23, 2021, at 14:23, Manusfisch via groups.io <tjfischer653=mac.com@groups.io> wrote:

Dale, I too like to see the problem in real time and sometimes the poster is just “thinking out loud” which leads to solutions. We are all problem solvers otherwise we would not be in this hobby. I see a point where you don’t want to escalate a problem by overstating it but I found Harley Davidson’s post quite informative to a point I set up my Mach2 and made sure I did not hear the same with it loaded. I usually and a slow slewer as I am still a pilgrim when it comes to driving around the night sky. These posts will engender a lot of different thought and perspectives. However, hair can catch on fire on occasion and I too want to avoid that on open forums. Tom Fischer, Indy

On May 23, 2021, at 13:24, Dale Ghent <daleg@elemental.org> wrote:


Yes, a summary post with the findings would make for a nice post to the list - after the issue has been worked out with A-P support.

On May 23, 2021, at 09:11, Seb@stro <sebastiendore1@hotmail.com> wrote:

Dale, I do not entirely disagree with your comment but I personally find these kind of posts very interesting as AP often share good advices and enlightened knowledge of the working of their equipment. (Isn’t that what this forum is for?

In some cases I think it can also help other users who encounters similar problems to pinpoint the cause and solve it quickly on their own (assuming there is a resolution made public).

Sébastien

Le 23 mai 2021 à 08:37, Dale Ghent <daleg@elemental.org> a écrit :


If what you really want is support from Astro-Physics, you really ought to contact support@astro-physics.com directly rather than posting to the mailing lists.

On May 23, 2021, at 06:08, Harley Davidson <astrocnc@toast.net> wrote:

Thanks Yasushi. I will see what Roland says before I do anything.

tony

On 5/22/2021 11:05 PM, Yasushi Fukunaga wrote:
This may not give you the straight solution but an idea.
I had the exact same vibration noise from the RA of my 1600GTO as yours a few months ago after executing the worm meshing.
I finally found the screws were loose which caused the resonance so I retightened the screws and resolved it.

The Mach2 gearbox looks different from that of 1600GTO, but the root cause might be the same and hope this helps.

Yasushi Fukunaga
















Re: Mach2 vibration & noise issue from the RA axis

Manusfisch
 

Agree , I try to do my mining of data first.  My dad taught me to keep my eyes open and my mount shut when trying to solve a problem…….  but not this one on a new product with strange sounds.  Tom

On May 23, 2021, at 14:28, ROBERT WYNNE <robert-wynne@...> wrote:

I wholeheartedly agree. But sometimes the answer to one's question is already buried in the A-P archive just waiting to be discovered. -Best, Robert
On 05/23/2021 11:23 AM Manusfisch via groups.io <tjfischer653@...> wrote:


Dale, I too like to see the problem in real time and sometimes the poster is just “thinking out loud” which leads to solutions.   We are all problem solvers otherwise we would not be in this hobby.  I see a point where you don’t want to escalate a problem by overstating it but I found Harley Davidson’s post quite informative to a point I set up my Mach2 and made sure I did not hear the same with it loaded.  I usually and a slow slewer as I am still a pilgrim when it comes to driving around the night sky.  These posts will engender a lot of different thought and perspectives. However, hair can catch on fire on occasion and I too want to avoid that on open forums.  Tom Fischer, Indy

On May 23, 2021, at 13:24, Dale Ghent <daleg@...> wrote:


Yes, a summary post with the findings would make for a nice post to the list - after the issue has been worked out with A-P support.

On May 23, 2021, at 09:11, Seb@stro <sebastiendore1@...> wrote:

Dale, I do not entirely disagree with your comment but I personally find these kind of posts very interesting as AP often share good advices and enlightened knowledge of the working of their equipment. (Isn’t that what this forum is for?

In some cases I think it can also help other users who encounters similar problems to pinpoint the cause and solve it quickly on their own (assuming there is a resolution made public). 

Sébastien 

Le 23 mai 2021 à 08:37, Dale Ghent <daleg@...> a écrit :


If what you really want is support from Astro-Physics, you really ought to contact support@... directly rather than posting to the mailing lists.

On May 23, 2021, at 06:08, Harley Davidson <astrocnc@...> wrote:

Thanks Yasushi. I will see what Roland says before I do anything.

tony

On 5/22/2021 11:05 PM, Yasushi Fukunaga wrote:
This may not give you the straight solution but an idea.
I had the exact same vibration noise from the RA of my 1600GTO as yours a few months ago after executing the worm meshing.
I finally found the screws were loose which caused the resonance so I retightened the screws and resolved it.

The Mach2 gearbox looks different from that of 1600GTO, but the root cause might be the same and hope this helps.

Yasushi Fukunaga




























Re: Mach2 vibration & noise issue from the RA axis

ROBERT WYNNE
 

I wholeheartedly agree. But sometimes the answer to one's question is already buried in the A-P archive just waiting to be discovered. -Best, Robert

On 05/23/2021 11:23 AM Manusfisch via groups.io <tjfischer653=mac.com@groups.io> wrote:


Dale, I too like to see the problem in real time and sometimes the poster is just “thinking out loud” which leads to solutions. We are all problem solvers otherwise we would not be in this hobby. I see a point where you don’t want to escalate a problem by overstating it but I found Harley Davidson’s post quite informative to a point I set up my Mach2 and made sure I did not hear the same with it loaded. I usually and a slow slewer as I am still a pilgrim when it comes to driving around the night sky. These posts will engender a lot of different thought and perspectives. However, hair can catch on fire on occasion and I too want to avoid that on open forums. Tom Fischer, Indy

On May 23, 2021, at 13:24, Dale Ghent <daleg@elemental.org> wrote:


Yes, a summary post with the findings would make for a nice post to the list - after the issue has been worked out with A-P support.

On May 23, 2021, at 09:11, Seb@stro <sebastiendore1@hotmail.com> wrote:

Dale, I do not entirely disagree with your comment but I personally find these kind of posts very interesting as AP often share good advices and enlightened knowledge of the working of their equipment. (Isn’t that what this forum is for?

In some cases I think it can also help other users who encounters similar problems to pinpoint the cause and solve it quickly on their own (assuming there is a resolution made public).

Sébastien

Le 23 mai 2021 à 08:37, Dale Ghent <daleg@elemental.org> a écrit :


If what you really want is support from Astro-Physics, you really ought to contact support@astro-physics.com directly rather than posting to the mailing lists.

On May 23, 2021, at 06:08, Harley Davidson <astrocnc@toast.net> wrote:

Thanks Yasushi. I will see what Roland says before I do anything.

tony

On 5/22/2021 11:05 PM, Yasushi Fukunaga wrote:
This may not give you the straight solution but an idea.
I had the exact same vibration noise from the RA of my 1600GTO as yours a few months ago after executing the worm meshing.
I finally found the screws were loose which caused the resonance so I retightened the screws and resolved it.

The Mach2 gearbox looks different from that of 1600GTO, but the root cause might be the same and hope this helps.

Yasushi Fukunaga














Re: Mach2 vibration & noise issue from the RA axis

Manusfisch
 

Dale, I too like to see the problem in real time and sometimes the poster is just “thinking out loud” which leads to solutions. We are all problem solvers otherwise we would not be in this hobby. I see a point where you don’t want to escalate a problem by overstating it but I found Harley Davidson’s post quite informative to a point I set up my Mach2 and made sure I did not hear the same with it loaded. I usually and a slow slewer as I am still a pilgrim when it comes to driving around the night sky. These posts will engender a lot of different thought and perspectives. However, hair can catch on fire on occasion and I too want to avoid that on open forums. Tom Fischer, Indy

On May 23, 2021, at 13:24, Dale Ghent <daleg@elemental.org> wrote:


Yes, a summary post with the findings would make for a nice post to the list - after the issue has been worked out with A-P support.

On May 23, 2021, at 09:11, Seb@stro <sebastiendore1@hotmail.com> wrote:

Dale, I do not entirely disagree with your comment but I personally find these kind of posts very interesting as AP often share good advices and enlightened knowledge of the working of their equipment. (Isn’t that what this forum is for?

In some cases I think it can also help other users who encounters similar problems to pinpoint the cause and solve it quickly on their own (assuming there is a resolution made public).

Sébastien

Le 23 mai 2021 à 08:37, Dale Ghent <daleg@elemental.org> a écrit :


If what you really want is support from Astro-Physics, you really ought to contact support@astro-physics.com directly rather than posting to the mailing lists.

On May 23, 2021, at 06:08, Harley Davidson <astrocnc@toast.net> wrote:

Thanks Yasushi. I will see what Roland says before I do anything.

tony

On 5/22/2021 11:05 PM, Yasushi Fukunaga wrote:
This may not give you the straight solution but an idea.
I had the exact same vibration noise from the RA of my 1600GTO as yours a few months ago after executing the worm meshing.
I finally found the screws were loose which caused the resonance so I retightened the screws and resolved it.

The Mach2 gearbox looks different from that of 1600GTO, but the root cause might be the same and hope this helps.

Yasushi Fukunaga












Re: Mach2 vibration & noise issue from the RA axis

Dale Ghent
 

Yes, a summary post with the findings would make for a nice post to the list - after the issue has been worked out with A-P support.

On May 23, 2021, at 09:11, Seb@stro <sebastiendore1@hotmail.com> wrote:

Dale, I do not entirely disagree with your comment but I personally find these kind of posts very interesting as AP often share good advices and enlightened knowledge of the working of their equipment. (Isn’t that what this forum is for?

In some cases I think it can also help other users who encounters similar problems to pinpoint the cause and solve it quickly on their own (assuming there is a resolution made public).

Sébastien

Le 23 mai 2021 à 08:37, Dale Ghent <daleg@elemental.org> a écrit :


If what you really want is support from Astro-Physics, you really ought to contact support@astro-physics.com directly rather than posting to the mailing lists.

On May 23, 2021, at 06:08, Harley Davidson <astrocnc@toast.net> wrote:

Thanks Yasushi. I will see what Roland says before I do anything.

tony

On 5/22/2021 11:05 PM, Yasushi Fukunaga wrote:
This may not give you the straight solution but an idea.
I had the exact same vibration noise from the RA of my 1600GTO as yours a few months ago after executing the worm meshing.
I finally found the screws were loose which caused the resonance so I retightened the screws and resolved it.

The Mach2 gearbox looks different from that of 1600GTO, but the root cause might be the same and hope this helps.

Yasushi Fukunaga








Re: Cone Error or Sensor Tilt or Sensor Shift or Collimation or ... what?

wbelhaven
 

Thanks John. Good eye. I added a 1mm spacer at some point, but now I can't remember exactly when. Pretty sad, I admit. Here's what I know and what I'm not sure of, in the order of images captured:

  • M51: definitely before I added the spacer, but the seeing was lousy those nights so it might not reveal anything definitive
  • M101: likely changed horses mid stream -- some nights without, some nights with the 1mm spacer
  • M13: likely after adding the 1mm spacer
  • Leo Triplet: definitely after adding the 1mm spacer
  • M44: please ignore as it was taken with a different scope which was very much not properly spaced
I also added a "Brady Bunch" folder (smile) with collages that make it easy to simultaneously view the corners, the sides, and the center of each image, all on a single screen at full resolution.

To my eye, the Leo Triplet image is the best resolved and also an improvement over the others in the corners. I'm going to try another 1mm spacer as that's really easy to add. If it overshoots, I'll just remove it. I suspect there's tilt here, as the corners of this image don't look symmetric to me (the starts do not all flare radial or all azimuthal, respectively, in the corners).


Re: Cone Error or Sensor Tilt or Sensor Shift or Collimation or ... what?

John Jennings
 

Not all pics exhibit the flattener spacing issue. Are all the pics with the same spacing, or did you disassemble and change the spacing? Tilt can change if you reorient the imaging train. I could never get my AP155 + flattener tilt adjusted until I added the gerd nueman Tilt Adjuster CTU.


Re: Cone Error or Sensor Tilt or Sensor Shift or Collimation or ... what?

John Jennings
 

Based on the stars in a couple of your pics, it looks like you have a bunch of astigmatism due to the current flattener spacing. For me its always been difficult to correct tilt with that much error in spacing. You end up chasing the tilt. I would get the spacing closer then optimize the tilt afterward. Just my 2c.


Re: Mach2 vibration & noise issue from the RA axis

Seb@stro
 
Edited

Dale, I do not entirely disagree with your comment but I personally find these kind of posts very interesting as AP (and other experienced users) often share good advices and enlightened knowledge of the working of their equipment. (Isn’t that what this forum is for?

In some cases I think it can also help other users who encounters similar problems to pinpoint the cause and solve it quickly on their own (assuming there is a resolution made public).

Sébastien

Le 23 mai 2021 à 08:37, Dale Ghent <daleg@elemental.org> a écrit :


If what you really want is support from Astro-Physics, you really ought to contact support@astro-physics.com directly rather than posting to the mailing lists.

On May 23, 2021, at 06:08, Harley Davidson <astrocnc@toast.net> wrote:

Thanks Yasushi. I will see what Roland says before I do anything.

tony

On 5/22/2021 11:05 PM, Yasushi Fukunaga wrote:
This may not give you the straight solution but an idea.
I had the exact same vibration noise from the RA of my 1600GTO as yours a few months ago after executing the worm meshing.
I finally found the screws were loose which caused the resonance so I retightened the screws and resolved it.

The Mach2 gearbox looks different from that of 1600GTO, but the root cause might be the same and hope this helps.

Yasushi Fukunaga





Re: Mach2 vibration & noise issue from the RA axis

Dale Ghent
 

If what you really want is support from Astro-Physics, you really ought to contact support@astro-physics.com directly rather than posting to the mailing lists.

On May 23, 2021, at 06:08, Harley Davidson <astrocnc@toast.net> wrote:

Thanks Yasushi. I will see what Roland says before I do anything.

tony

On 5/22/2021 11:05 PM, Yasushi Fukunaga wrote:
This may not give you the straight solution but an idea.
I had the exact same vibration noise from the RA of my 1600GTO as yours a few months ago after executing the worm meshing.
I finally found the screws were loose which caused the resonance so I retightened the screws and resolved it.

The Mach2 gearbox looks different from that of 1600GTO, but the root cause might be the same and hope this helps.

Yasushi Fukunaga


Re: Mach2 vibration & noise issue from the RA axis

Harley Davidson
 

Thanks Yasushi. I will see what Roland says before I do anything.

tony

On 5/22/2021 11:05 PM, Yasushi Fukunaga wrote:

This may not give you the straight solution but an idea.
I had the exact same vibration noise from the RA of my 1600GTO as yours a few months ago after executing the worm meshing.
I finally found the screws were loose which caused the resonance so I retightened the screws and resolved it.

The Mach2 gearbox looks different from that of 1600GTO, but the root cause might be the same and hope this helps.

Yasushi Fukunaga



Re: Mach2 vibration & noise issue from the RA axis

Yasushi Fukunaga
 

This may not give you the straight solution but an idea.
I had the exact same vibration noise from the RA of my 1600GTO as yours a few months ago after executing the worm meshing.
I finally found the screws were loose which caused the resonance so I retightened the screws and resolved it.

The Mach2 gearbox looks different from that of 1600GTO, but the root cause might be the same and hope this helps.

Yasushi Fukunaga


Mach2 vibration & noise issue from the RA axis

Harley Davidson
 

https://www.youtube.com/watch?v=qNQLvL1FY8Y

As per my video link above I have just noticed a vibration and noise issue from the RA axis. It only does it when going from the west side to the east side of the mount. Also, the Go-To speed must be at 1000 or 1800. Whats up???

thanks  tony

BTW - here is the description on my YouTube page for this video:

Tonight, May 22 - 2021 I noticed a vibration from my Astro-Physics Mach2 mount at the 1000 and 1800 Go-To rates coming from the RA axis. It only occurs when going from the west side of the mount to the east side.

Clip 2 is @ 1800 WEST SIDE to park 3
Clip 3 is @ 1800 EAST SIDE to park 3
Clip 4 is @ 600 WEST SIDE to park 3
Clip 5 is @ 1000 WEST SIDE to park 3
Clip 6 is @ 1800 WEST SIDE to park 3
Clip 7 is @ 600 WEST SIDE to park 3
Clip 8 is @ 1000 WEST SIDE to park 3

The rest of the video is documented verbally by me.


Re: Using 67PF562 flattener with 130 F6.3 GT

ROBERT WYNNE
 

I do believe in your ability to segregate threads from lenses. The size of particle is the size one could only see under Scanning Electron Microscopy. The "chunks" are large enough not to pass behind the threads. On the other hand over time while threading and unthreading graphite will mill itself to sub micron particulate and where it finally ends up is anyone's guess. It's either on the front of the threaded assembly or behind. -Best, Robert 

On 05/22/2021 11:11 AM DFisch <manusfisch@...> wrote:
 
 
Robert I started using lead graphite pencils on the threads about 10 years ago. I’ve never seen any particles that really fall to the lenses when I have applied them carefully . I’ve even used a pair of loupes to look for debris on the lens and just haven’t seen it. I first started using it on our interchangeable objectives for our operating microscope and we were very cognizant of any debris falling into the wound after application, I don’t get carried away with the application and if I leave some chunks I certainly wipe them off with a paper  towel or a microfiber cloth 

On Sat, May 22, 2021 at 14:04 ROBERT WYNNE < robert-wynne@...> wrote:
I would be very suspect to use any anti-siezing compound near optics. This is due the introduction of fine metallic particles that make the compound "anti- siezing" even graphite from a "lead" pencil. Anything harder than the lens or coating used as a lubricant is potentially detrimental/destructive to the optics. -Best, Robert
On 05/22/2021 8:29 AM Jeffc < jeffcrilly@...> wrote:
 
 
I’m not familiar with metals and thread sizing except from the perspective of experiencing stuck parts.  
 
I also wonder if “anti-sieze” would be appropriate..  I feel like this would potentially get on optics near the part. 
 
https://www.westmarine.com/buy/star-brite--anti-seize-thread-lubricant--15067002

 

On May 22, 2021, at 7:48 AM, M Hambrick < mhambrick563@...> wrote:

I know your pain Robert.

The first time I locked my ADA2767 and ADA 671 together I did not have any strap wrenches. Using extreme caution I was able to break them loose using a pair of Channellocks and a vise with lots of padding. I think that the usefulness of the strap wrench depends on what kind of rubber is used for the straps. It has to be strong, and it has to be able to grip.

I wonder what the thinking is on putting a very small amount of oil on the threads and / or mating surfaces to avoid this or to at least minimize the amount of force needed to break them loose.

Mike

 

 

--
TJF MOBILE


Re: Using 67PF562 flattener with 130 F6.3 GT

ROBERT WYNNE
 

You have me one this one. I've been involved with machine shops over the last 40 years and have never run into a situation where a hand tightened threaded assembly was so easily siezed that it could not be parted - except when a 12" diameter dowel required a soak in a furnace at 900 degrees to free it while hanging upside down over a padded platen.
 
I have a small shop and its fairly well equipped for its size but my channel locks with RTV padding wrapped around the OTA got me zilch. Even held in a "V" groove in a vise (here I had to be especially careful not to crush the OTA out of round) got me nowhere. If I had a engine lathe with a 3" collet I probably would have been able to break the seize. -Best, Robert

On 05/22/2021 7:48 AM M Hambrick <mhambrick563@...> wrote:
 
 
I know your pain Robert.

The first time I locked my ADA2767 and ADA 671 together I did not have any strap wrenches. Using extreme caution I was able to break them loose using a pair of Channellocks and a vise with lots of padding. I think that the usefulness of the strap wrench depends on what kind of rubber is used for the straps. It has to be strong, and it has to be able to grip.

I wonder what the thinking is on putting a very small amount of oil on the threads and / or mating surfaces to avoid this or to at least minimize the amount of force needed to break them loose.

Mike


Re: Using 67PF562 flattener with 130 F6.3 GT

DFisch
 

Robert I started using lead graphite pencils on the threads about 10 years ago. I’ve never seen any particles that really fall to the lenses when I have applied them carefully . I’ve even used a pair of loupes to look for debris on the lens and just haven’t seen it. I first started using it on our interchangeable objectives for our operating microscope and we were very cognizant of any debris falling into the wound after application, I don’t get carried away with the application and if I leave some chunks I certainly wipe them off with a paper  towel or a microfiber cloth 

On Sat, May 22, 2021 at 14:04 ROBERT WYNNE <robert-wynne@...> wrote:
I would be very suspect to use any anti-siezing compound near optics. This is due the introduction of fine metallic particles that make the compound "anti- siezing" even graphite from a "lead" pencil. Anything harder than the lens or coating used as a lubricant is potentially detrimental/destructive to the optics. -Best, Robert
On 05/22/2021 8:29 AM Jeffc <jeffcrilly@...> wrote:
 
 
I’m not familiar with metals and thread sizing except from the perspective of experiencing stuck parts.  
 
I also wonder if “anti-sieze” would be appropriate..  I feel like this would potentially get on optics near the part. 
 
https://www.westmarine.com/buy/star-brite--anti-seize-thread-lubricant--15067002

 

On May 22, 2021, at 7:48 AM, M Hambrick <mhambrick563@...> wrote:

I know your pain Robert.

The first time I locked my ADA2767 and ADA 671 together I did not have any strap wrenches. Using extreme caution I was able to break them loose using a pair of Channellocks and a vise with lots of padding. I think that the usefulness of the strap wrench depends on what kind of rubber is used for the straps. It has to be strong, and it has to be able to grip.

I wonder what the thinking is on putting a very small amount of oil on the threads and / or mating surfaces to avoid this or to at least minimize the amount of force needed to break them loose.

Mike

--
TJF MOBILE


Re: Using 67PF562 flattener with 130 F6.3 GT

ROBERT WYNNE
 

I would be very suspect to use any anti-siezing compound near optics. This is due the introduction of fine metallic particles that make the compound "anti- siezing" even graphite from a "lead" pencil. Anything harder than the lens or coating used as a lubricant is potentially detrimental/destructive to the optics. -Best, Robert

On 05/22/2021 8:29 AM Jeffc <jeffcrilly@...> wrote:
 
 
I’m not familiar with metals and thread sizing except from the perspective of experiencing stuck parts.  
 
I also wonder if “anti-sieze” would be appropriate..  I feel like this would potentially get on optics near the part. 
 
https://www.westmarine.com/buy/star-brite--anti-seize-thread-lubricant--15067002

 

On May 22, 2021, at 7:48 AM, M Hambrick <mhambrick563@...> wrote:

I know your pain Robert.

The first time I locked my ADA2767 and ADA 671 together I did not have any strap wrenches. Using extreme caution I was able to break them loose using a pair of Channellocks and a vise with lots of padding. I think that the usefulness of the strap wrench depends on what kind of rubber is used for the straps. It has to be strong, and it has to be able to grip.

I wonder what the thinking is on putting a very small amount of oil on the threads and / or mating surfaces to avoid this or to at least minimize the amount of force needed to break them loose.

Mike


Re: Cone Error or Sensor Tilt or Sensor Shift or Collimation or ... what?

wbelhaven
 

Thanks everyone, really appreciate the analysis. To summarize, the current hypothesis is some sensor tilt (possibly focuser tilt too) and likely also some cone error. Adjusting the sensor tilt and focuser are difficult (inconvenient might be a better word) and out of my league, respectively. The cone error is pretty easy to fix and might give slightly better pointing and tracking (and thus guiding) but is probably not worth messing with either. I may try the "rotate the camera" test to see what happens, as that's really easy to do.

If anyone's curious to see the full res, uncropped, images I've captured so far with this setup, here's a link: https://drive.google.com/drive/folders/1U4sjCDcXa0xUFLCvdm9b9-1gV9zu5Xea?usp=sharing

The seeing was really good on the nights I captured M101, M13, and the Leo Triplet ... not so much on M51.


Re: Using 67PF562 flattener with 130 F6.3 GT

Manusfisch
 

I keep a carpenters flat pencil and make a run around the leading threads Taking great care not to allow particles to fall into the optics it’s pretty easy and makes for easier starting and easier removal certainly takes the squeaks out and I keep my strap wrenches nearby

TJF Mobile

On May 22, 2021, at 11:29, Jeffc <jeffcrilly@...> wrote:

I’m not familiar with metals and thread sizing except from the perspective of experiencing stuck parts.  

I also wonder if “anti-sieze” would be appropriate..  I feel like this would potentially get on optics near the part. 

https://www.westmarine.com/buy/star-brite--anti-seize-thread-lubricant--15067002


On May 22, 2021, at 7:48 AM, M Hambrick <mhambrick563@...> wrote:

I know your pain Robert.

The first time I locked my ADA2767 and ADA 671 together I did not have any strap wrenches. Using extreme caution I was able to break them loose using a pair of Channellocks and a vise with lots of padding. I think that the usefulness of the strap wrench depends on what kind of rubber is used for the straps. It has to be strong, and it has to be able to grip.

I wonder what the thinking is on putting a very small amount of oil on the threads and / or mating surfaces to avoid this or to at least minimize the amount of force needed to break them loose.

Mike


Re: Using 67PF562 flattener with 130 F6.3 GT

Jeffc
 

I’m not familiar with metals and thread sizing except from the perspective of experiencing stuck parts.  

I also wonder if “anti-sieze” would be appropriate..  I feel like this would potentially get on optics near the part. 

On May 22, 2021, at 7:48 AM, M Hambrick <mhambrick563@...> wrote:

I know your pain Robert.

The first time I locked my ADA2767 and ADA 671 together I did not have any strap wrenches. Using extreme caution I was able to break them loose using a pair of Channellocks and a vise with lots of padding. I think that the usefulness of the strap wrench depends on what kind of rubber is used for the straps. It has to be strong, and it has to be able to grip.

I wonder what the thinking is on putting a very small amount of oil on the threads and / or mating surfaces to avoid this or to at least minimize the amount of force needed to break them loose.

Mike

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