Nexstar clutch.

  1. Stephenbells
    Stephenbells
    I bought my 8se back in June and a couple of nights ago I used it for the first time when the outside temperature was fairly low, although still above freezing.
    Heat makes things expand and cold contract but I noticed how easy it became to overcome the alt clutch. In fact I had to realign a couple of times where I touched the tube, not heavy handedly but enough for it to shift downwards.
    Has anyone else had this problem? The clutch I'm sure must be adjustable and is probably not too difficult to do but any advice welcome, i'm sure it must be all to easy to over do it and cause serious damage if there is a collision with the tripod.
    I noticed this also in warmer weather but with my homemade dew shield fitted.
    I appreciate the importance of having the tube balanced on the mount as much as possible although this is often dictated by having the tube slightly forward to prevent the star diagonal hitting the battery compartment (see one of my previous posts regarding my focal reducer).
  2. sxinias
    sxinias
    Hi,

    Adjusting the clutch is not difficult. Remove your OTA from your mount and look inside your altitude arm in the area that was hidden by the OTA. You will see a self tightening nut. Simply tighten the nut. Go slow, turning a tiny bit until you get the tension you want.
  3. Stephenbells
    Stephenbells
    Many thanks for the info:-)
  4. MIA-Twin27
    MIA-Twin27
    sxinias: Good to know for future references.Stephenbells: Great question & can you advise if the suggestion resolved your issue?
  5. MIA-Twin27
    MIA-Twin27
    sxinias: Good to know for future references.Stephenbells: Great question & can you advise if the suggestion resolved your issue?
  6. rtlrp12
    rtlrp12
    The nut for the alt axis clutch on the SE mount is located behind the the hand controller bracket on the opposite side of the arm from the OTA. This bracket is held on with 3 screws. Remove these screws and you will see the very large nut. It will take just a very small amount of adjustment. You want to adjust the clutch with the OTA mounted and with all the equipment, diag, EP, finder, dew shield on the OTA. Just as it will be equipped when you observe. Adjust the clutch so that the mount won't slip with the weight of the OTA, but it should take some amount of pressure to move it. You don't want the clutch so tight as to cause damage if for some reason the OTA hits something and the clutch won't slip with the motors running. This could cause damage to the mount/motors. Just get a feel for how tight is proper for the weight of your set up. It may take an adjustment or two to get the results you want. Just remember it only takes very fine adjustments to make a big difference.

    Stan
  7. rtlrp12
    rtlrp12
  8. Ruud
    Thank you Stan. Those are very clear instructions.
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