Clamp Base Slop - Adjustment.

gold325

Hall of Fame
Hi All

Machine is an older model Pro's Pro Hornet w/ 3 finger clamps.

Clamp Base Issue. One of the two clamps has some rotational drawback or slop. Visible in the video below.


Unsure how to get rid of it. If I tighten the inside of the clamp (using an allen wrench and hold the large locking nut underneath with a matching wrench) any more then it will not slide on the rails. Any help, direction, videos, links etc.. would be appreciated.

From what I can figure out the clamp base is a spring assisted clamp base similar or exactly like this Eagnas model.


c38swb1.jpg


This will be a low budget setup and will remain so upgrading to high end clamps not an option.
 
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gold325

Hall of Fame
Does anyone have the manual/instructions for this kind of clamp? I can provide move pics of the disassembled clamp if required.
 

gold325

Hall of Fame
Do you have they black rubbery piece as shown on the blue base clamp?
If so the rubbery piece should come off and use an Allen key to tighten the base.

Yes it comes of, yes I have. But unable to remove a small amount of rotational slop in one of the two bases.

Typically shows up during the center mains and center crosses since the tension is able to pull the slop in that direction.

I'm sure there is some additional adjustment or technique that I am aware of to fix it... Maybe the locking nut, washer below rails, the Allen headed nut and the Allen assesible through side hold have to be adjusted/tighted in a specific order that I am not doing
 

jim e

Legend
That black plug on base , after you pop it off, you have to rotate it to 90 degrees to rail, then use metric size wrench , you will have to try a few to get the proper size you need, to turn the adjustable clockwise a very small amount, till more secure.
 

georgeyew

Semi-Pro
When you lock down the lever, how far does the lever move to the other side? In my Alpha Revo 4000 manual, it says the lever should be at about 6 o'clock position when tight.
 

gold325

Hall of Fame
That black plug on base , after you pop it off, you have to rotate it to 90 degrees to rail, then use metric size wrench , you will have to try a few to get the proper size you need, to turn the adjustable clockwise a very small amount, till more secure.

Yes I did that. Tightened it all the way and there slowly loosened it so that the knob would lock at 6 o clock.

When you lock down the lever, how far does the lever move to the other side? In my Alpha Revo 4000 manual, it says the lever should be at about 6 o'clock position when tight.

I have tried adjusting it to 5,6,7 o clock using the adjustment Allen through the port that has the rubber cover. It seemingly locks securely in every position
 

gold325

Hall of Fame
I dis-assembled & reassembled the clamps.
  • Over-tightened the main vertical nut allen ( while holding the locknut/washer combo underneath) and then undid it a little till I got movement. of the base over the tracks
  • Then tightened the horizontal allen completely and then backed off till it locked at 6 o clock.
Seemed to reduce the drawback tremendously and did a set of mains without this clicking that is shows in the video above. Maybe this is the limit of a low end machine and I was expecting too much from it.

Thanks!
 
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gold325

Hall of Fame
The law of economics can't cancel out this product either - you get what you pay for.
That is the sad truth.

Agreed 100% - wanted to optimize what I have already and getting closer to that step by step.

At my 11th racket ever - I can confidently say my string job is already better than the local tennis store which has college kids stringing on a Bailardo.
 
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struggle

Legend
I have an Eagnas manual that will cover those clamps (they are the same).

I can email it to you (Message me your email address)
 

WYK

Hall of Fame
Good to hear the news. You inspired me to disassemble my Comet clamps and thoroughly clean them - for the first time in 5 freaking years.
Oddly, these do not have the adjustment screw. They are a very simple design with the adjustment being mainly two nuts on the base.
Now I know why they lasted me 5 years without dissembling. There are almost no parts in this clamp. The only small part that can go wrong is the bearing race, which was in excellent condition, and looks like a part you can easily find.
The crush washer it sits in appears indestructible.
I was considering upgrading these clamps, but I think I'll wait until the machine eventually dies and just get something new.
It just works.

I do recall when I was in college and visited a pro shop in the Bay Area of California watching another college kid I knew string a racquet. I might have been Swetkas back then, too.
Only, unlike your experience, this guy to date is the fastest I have ever seen anyone string a racquet.
It was like he passed his hands over the stringbed and it magically weaved itself. Even the pros I have seen since didn't have the speed and fluidity this kid had.
He was on a NEOS, of course, as it seemed everyone was back then. This guy reminded me of him how casual he is:

 

gold325

Hall of Fame
Good to hear the news. You inspired me to disassemble my Comet clamps and thoroughly clean them - for the first time in 5 freaking years.
Oddly, these do not have the adjustment screw. They are a very simple design with the adjustment being mainly two nuts on the base.
Now I know why they lasted me 5 years without dissembling. There are almost no parts in this clamp. The only small part that can go wrong is the bearing race, which was in excellent condition, and looks like a part you can easily find.
The crush washer it sits in appears indestructible.
I was considering upgrading these clamps, but I think I'll wait until the machine eventually dies and just get something new.
It just works.

The adjustment screw allows slightly more control over adjustments. If a main screw, washer, lock nut and is adjusted in a precision manner with longer wrench you can get the same amount of precision anyway it seems like with a little more effort.

His magical cross weave with no effort is crazy good!!! Wonder what string it was... He went straight across as well, it looked like and NOT at a huge angle to make things easier.
 
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struggle

Legend
The comet has cone lock bases and those don’t have the micro adjustment screw.

The switch/quick action clamps are nicer to use, of course, but do require more precise adjustment by design.

To me, this is huge factor to consider when shopping for a machine. Similar machines will differ here a fair amount in the lower entry level Fixed Clamp machines.
 

WYK

Hall of Fame
The comet has cone lock bases and those don’t have the micro adjustment screw.

The switch/quick action clamps are nicer to use, of course, but do require more precise adjustment by design.

To me, this is huge factor to consider when shopping for a machine. Similar machines will differ here a fair amount in the lower entry level Fixed Clamp machines.

It depends on what base you get with your ProsPro machine. I got the bearing with thrust washer bases. I think these are off the Pioneer.
All it has is a bearing/race and a pair of thrust washers, a bolt and two nuts. That's it.
You adjust it by adjusting the nuts that hold it tight to the rail. The bearings seem to be fairly high quality as they had no real wear spots on them when I inspected them.


a-Alko-Thrust-Bearing-Jockey-Wheelsl.jpg
 
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