need help to reduce rotation drag of my turntable on gamma 602fc

Discussion in 'Stringing Techniques / Stringing Machines' started by taurussable, Jan 25, 2013.

  1. taurussable

    taurussable Professional

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    I strung about 10 racquets on my 602fc since I bought it June last year new. The friction of the center post of the turntable has come to a point that I feel I can't stand it anymore. so I pulled out the turntable, put some grease accumulated at the bottom of the post back to the turntable bushing. It didn't help. The weight of the machine itself can't stop the base from moving when I rotate the turntable. I already took out the set screw that is used to increase friction.

    I'd like to know if other gamma 602fc users have similar experiences. Or does anyone know any magic grease that can reduce the drag on my machine?

    reference:
    http://tt.tennis-warehouse.com/showthread.php?t=444168
     
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  2. Lakers4Life

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    What kinda of grease are you using? I would recomend a lithium based grease or Teflon (PTFE) grease. There is Teflon based grease called, Grease Lightining, that can be found at most bike shops or REI.
     
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  3. taurussable

    taurussable Professional

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    some grease accumulated at the bottom of the center post. it came with the machine out of factory. I put it back into the bushing but no help. it seems too viscous. I'll try ur stuff. I assume I need clean the bushing and center post thoroughly before using a new grease?
     
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  4. Lakers4Life

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    Wipe off the old grease and clean with Alcohol. Then lightly coat the post and the bushing with the Teflon grease.
     
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  5. diredesire

    diredesire Super Moderator

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    Wait... do you want to INCREASE or decrease the drag? It sounds like from "can't stop the base from moving" that you want to increase drag. If so, you should be using a heavy grease, I hear kilopoise is a good one. I haven't tried this myself, but I actually find my 5800 to rotate too freely. I actually have to lock my turn table down to keep weaving at a reasonable pace. The older Gamma machines didn't have this issue...
     
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  6. taurussable

    taurussable Professional

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    Sounds good! Thanks!
     
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  7. taurussable

    taurussable Professional

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    decrease... the friction is so much now that I can't even let the turntable rotate without moving the base of the machine. basically the feet of the machine moves before the turntable starts to rotate..
     
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  8. Lakers4Life

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    That sounds like something is binding. Possibly a factory defect. I had a X-6FC and it turned easily.
     
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  9. taurussable

    taurussable Professional

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    the center post and the bushing look fine to me. they are pasticky though. the friction is greatest at a certain angle and locks up. I guess the shaft and the bushing are not round enough. well I can't expect too much from a $500 machine. hopefully a good lube fixes it.
     
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  10. Faithfulfather

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    There is an adjustment screw on the turntable shaft. Maybe it is too tight.
     
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  11. taurussable

    taurussable Professional

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    i already took out the screw..
     
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  12. diredesire

    diredesire Super Moderator

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    sounds like you should take it apart and post pics. also shoot an e-mail to cad@gammasports.com to get John in this thread. I'd send him a link if i were you :)
     
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  13. taurussable

    taurussable Professional

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    video showing stringer moves when I push my turntable, too much friction

    http://youtu.be/XqLpugYUSyA

    pictures of center post and bushing

    [​IMG]
    [​IMG]

    If you guys think the level of friction is not normal, I'll ask John about it..
     
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  14. taurussable

    taurussable Professional

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    the screw in the video is the set screw I took out. it's use is to increase friction. I took it out to minimize friction.
     
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  15. Faithfulfather

    Faithfulfather Rookie

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  16. Faithfulfather

    Faithfulfather Rookie

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  17. taurussable

    taurussable Professional

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    #17
  18. Lakers4Life

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    Something is definitely snagging. If this is a new machine it's still under warranty. I would replace the bushing and the post just to be sure.

    Does the post hit the table?

    The clamps look like the old black plastic clamps. Is this a new machine?
     
    Last edited: Jan 25, 2013
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  19. taurussable

    taurussable Professional

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    you mean the center post? no. it is an inch away from the table. will ask gamma about it Thanks!
     
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  20. taurussable

    taurussable Professional

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    #20
  21. Lakers4Life

    Lakers4Life Hall of Fame

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    You also try calling on Monday. John has been real helpful, and since you are in the East Coast you should get the parts in a couple of days.
     
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  22. taurussable

    taurussable Professional

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    new bushing solved issue. fast turnover. kudos to gamma.
     
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  23. diredesire

    diredesire Super Moderator

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    Nice, glad to hear you got the support you needed.
     
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  24. Lakers4Life

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    Did they charge you or was it still under warranty?

    You should of called them in the first place. ;)
     
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  25. taurussable

    taurussable Professional

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    it is half year old machine:) just wanted to make sure my problem was indeed a problem
     
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  26. Lakers4Life

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    Was the bushing bad or the post?
     
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  27. taurussable

    taurussable Professional

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    the bushing was bad. it is plastic. post is steel so held up really well.
     
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  28. Lakers4Life

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    I tought it was metal like other machines.
     
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  29. struggle

    struggle Hall of Fame

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    I've had two string clamps and one swivel clamp replaced by Gamma.

    Great customer service, very accommodating.
     
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  30. Lakers4Life

    Lakers4Life Hall of Fame

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    You machine is newer than mine, and I've yet to have anything break down. (knock on wood)
     
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  31. struggle

    struggle Hall of Fame

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    just unlucky, i think. i really like the machine, just think i got a bad run of parts, primarily the string clamps exploded at the bearings.

    swivel clamp was just kinda crunchy (1) and didn't have that sweet "switch action" after a while, didn't "snap" on and off. it still worked ok.
     
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  32. Lakers4Life

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    I've pretty much been using Eagnas PN-1012 clamps on my 6004, as well as the Dual clamps that look like the currently shipped Gamma clamps (like yours). My Dual clamps, don't have the bearings like yours does.

    Someone told me Prince, Gamma and Alpha get thier current clamps from the same manufacturer. I think the new Alpha Ghost and Phnatom have the same clamps.
     
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  33. struggle

    struggle Hall of Fame

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    had the PN-1012 on my 910. They were fine and no bearings as i recall.
    What are the Dual clamps you speak of? Eagnas model? If so I don't see them, their website is so convoluted.
     
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  34. Lakers4Life

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    The Dual Clamps I got from Arfaian for less than $70 shipped. I got them to use for badminton, but they work great for tennis. They look like your clamps, but without the bearing.
    [​IMG]
    [​IMG]
    [​IMG]
     
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