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拆HEQ5

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lrf1981 发表于 2011-4-7 22:24 | 显示全部楼层 来自： 广东省惠州市 电信
没想到HEQ5也给人折了。强。
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购买望远镜就在牧夫天文商城
 楼主| steveyzh 发表于 2011-4-7 22:28 | 显示全部楼层 来自： 福建省泉州市 电信
3 - Synta HEQ5 - Stripping & Cleaning the Right Ascension (RA) Axis

Stage 1 - Stripping the RA Axis

                               
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Remove the polar scope cover.Remove the polar scope. You may need to grip it
with a wrench - if so wrap a cloth around the
polar scope to protect it. Alternately use some
masking tape to protect the scope.		Once loosened simply unscrew the polar scope and
place it somewhere safe.
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 楼主| steveyzh 发表于 2011-4-7 22:28 | 显示全部楼层 来自： 福建省泉州市 电信

                               
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Remove the silver Phillips screw in the RA
lock lever.		Remove the lock lever. You may need to prise this
up by using the tip of a flat bladed screwdriver and
gently twisting the tip - see the Declination strip
down procedure for a picture of this.		Remove the brass RA lock bolt. You may
need to use a small spanner or pliers. Also remove
the small brass button beneath the lock bolt.
If this is hard to do leave it -it can be removed easily
later in the procedure.
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 楼主| steveyzh 发表于 2011-4-7 22:29 | 显示全部楼层 来自： 福建省泉州市 电信

                               
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Unscrew the 6 Phillips screws around the plastic
motor cover.		Remove the motor cover and lay it aside with its
screws.		Slacken the two lock screws on the polarscope
mounting plate.
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 楼主| steveyzh 发表于 2011-4-7 22:30 | 显示全部楼层 来自： 福建省泉州市 电信

                               
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Now remove the polarscope mounting plate by
unscrewing it. You can use either some snipe
nosed pliers to locate into the holes OR a pair of
small/medium Phillips screw drivers or similar OR
a pair of small Allen keys.		Loosen and remove the RA setting circles lock nut.Now remove the RA setting circle. It should just
slip off.
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 楼主| steveyzh 发表于 2011-4-7 22:30 | 显示全部楼层 来自： 福建省泉州市 电信

                               
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Loosen the three lock screws set around the large
circular aluminium nut.		Unscrew and remove the circular nut. You may
need a wrench to do this - if so be careful of the
polar-scope mounting plate threads.
Alternately use a pair of flat bladed screwdrivers or
similar to apply even pressure using the slots in
the nut - do this with care.
Once removed observe the tapered bearing. It may
come out at this point - if not it can be removed
easily after the following step.		Remove the main RA Unit (right) from the base (left).
The Alt-Az base contains a bearing which will most
likely not remove easily. Leave it in-situ but clean
the bearing and the Alt-Az internal area and grease
the bearing face with lithium grease.
Note: At this point the small brass button for the
RA locking lever will be easy to push out if you
were unable to extract it earlier.
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 楼主| steveyzh 发表于 2011-4-7 22:31 | 显示全部楼层 来自： 福建省泉州市 电信

                               
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Remove the tapered bearing from the polarscope
end of the RA axis.		Here's the RA axis removed - naturally it also has
the DEC axis as part of it.
Note the red washer on top of the worm gear. Make
sure this is kept safe and is replaced during
re-assembly.		Unscrew the power panel. Its attached using two
Phillips screws.
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 楼主| steveyzh 发表于 2011-4-7 22:32 | 显示全部楼层 来自： 福建省泉州市 电信

                               
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Shift the power panel slightly. Be careful not to pull
too hard as it has wires which connect to the main
board inside the RA main housing.		Loosen the worm engagement set-screw located
behind the power panel.		Loosen the worm engagement set screw opposite
the power panel and above the Declination scale.

                               
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Remove the 3 cap headed bolts (silve coloured)
from the worm carrier.		Remove the worm carrier..Remove the brass worm gear making sure the small
red washer is kept aside.
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 楼主| steveyzh 发表于 2011-4-7 22:33 | 显示全部楼层 来自： 福建省泉州市 电信
4 - Synta HEQ5 - Lubrication & Re-Assembling the Right Ascension (RA) Axis

                               
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Lubricate the small roller bearings and replace them
on the worm, then replace the worm in its carrier.
Note: the worm has a longer spindle one end than
the other. The longer end goes to the motor gear.		Replace the float adjuster and tighten down. The
adjuster should be just tight enough to stop the
worm moving from left to right in the carrier but not
over tightened. If its too loose there will be 'play'
in the mount, if too tight the mount may 'bind'.		Here is the assembled worm carrier. Its been
cleaned and loose flaky paint removed.
You can see the worm now has a thin coat of lithium
grease.
Note: The motor gear can be reattached now or
left until later.The motor gear must have one of its
set screws on the flat portion of the worm spindle.
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 楼主| steveyzh 发表于 2011-4-7 22:34 | 显示全部楼层 来自： 福建省泉州市 电信

                               
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Replace the roller bearings into the brass worm
gear - apply a small amount of grease to the edges.
These may have to be tapped into place
using a nylon hammer or a block of wood.
Apply lubrication to the brass gears.		Place the brass gear back onto the RA shaft and
place the washer back to the top. Note the brass
gear has a layer of lubrication on its gears and on
the bearing face.		Replace the assembled worm carrier and replace
cap headed screws but only just tight enough to
hold the worm carrier in place.

                               
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Remount the Alt-Az base of the mount to the RA
axis - make sure the roller bearings faces are
given a smear of lithium grease.		Replace the tapered bearing after making sure it is
clean and has been well greased with the lithium
grease.		Replace the round slotted nut and tighten. This
needs to be not much more than hand tight.
Make sure that it is compressing the tapered
bearing into place.
Check slack in the RA axis and if it binds too
much then slightly then loosen this nut.
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 楼主| steveyzh 发表于 2011-4-7 22:34 | 显示全部楼层 来自： 福建省泉州市 电信

                               
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Tighten down the locking screws located in the slots
of the round nut.		Replace the Right Ascension scale and set-screw.Replace the polarscope base plate. Don't over-
tighten.

                               
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Tighten down the small set screws in the polar-
scope mounting plate.		Replace the RA brass button and lock nut and and
make sure its has been lubricated with lithium
grease.		 Replace the RA locking lever and make sure it is
free to lock and release the axis.
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 楼主| steveyzh 发表于 2011-4-7 22:35 | 显示全部楼层 来自： 福建省泉州市 电信

                               
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You will now need to replace the motor gear on the worm spindle if you omitted that step earlier.

The power cover has not been replaced as you will need it off to carry out the adjustment to the worm/motor engagement.
This procedure is covered HERE.

When worm/motor engagement has been completed proceed to the final step of replacing the motor and power covers.
Replace the RA lock lever screw.Replace the polarscope.

                               
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Replace the plastic motor cover. Replace the 6 Phillips screws in the motor cover.Replace the polarscope cover.
The polarscope will require recalibrating.
See my polar alignment guide HERE
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 楼主| steveyzh 发表于 2011-4-7 22:37 | 显示全部楼层 来自： 福建省泉州市 电信
5 - Synta HEQ5 -Worm / Motor Engagement for RA and DEC Axis

                               
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Loosen the DEC axis worm carrier three large silver cap screws JUST ENOUGH so that the small set screws can move the worm carrier.Loosen the DEC worm carrier upper set screw
and...........		.....Tighten the lower DEC worm carrier set screw just enough so that you can feel some play in the axis.
Note: You should loosen and tighten these screws
by approximately 1 quarter of a turn each time.

                               
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Now loosen the lower set screw and................Tighten the upper set screw JUST UNTIL
ANY PLAY STOPS.
Note: You should loosen and tighten these screws
by approximately 1 quarter of a turn each time.		Now tighten down the DEC worm carrier cap headed screws. Work around the screws clockwise tighetning a little each time until fully
tight.
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 楼主| steveyzh 发表于 2011-4-7 22:37 | 显示全部楼层 来自： 福建省泉州市 电信
本帖最后由 steveyzh 于 2011-4-7 22:39 编辑


                               
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At this point return to the DEC Assembly Guide or simply replace the Motor Cover.
Remove the motor cover and check that the motor gears can easily move the axis by manually turning them by hand or using the mounts motors.
Run the mounts DEC motor a full 360' to make sure there is
no binding at any point in the cycle.

If binding occurs you will need to readjust the set screws.
This can be a long process to get the perfect balance
between no play in the axis and smooth motor running.

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 楼主| steveyzh 发表于 2011-4-7 22:40 | 显示全部楼层 来自： 福建省泉州市 电信

                               
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Loosen the RA worm carriers three large silver cap screws JUST ENOUGH so that the small set screws can move the worm carrier.Loosen the RA worm carrier upper set screw
and...........
Note: You will have to remove the power panel to get axis to the upper RA set screw. The panel is retained by two Phillips screws.		.....Tighten the RA worm carrier lower set screw just enough so that you can feel some play in the axis.
Note: You should loosen and tighten these screws
by approximately 1 quarter of a turn each time

                               
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Now loosen the lower set screw and................Tighten the upper set screw JUST UNTIL
ANY PLAY STOPS.
Note: You should loosen and tighten these screws
by approximately 1 quarter of a turn each time		Now tighten down the RA worm carrier cap headed screws. Work around the screws clockwise tighetning a little each time until fully
tight.
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 楼主| steveyzh 发表于 2011-4-7 22:41 | 显示全部楼层 来自： 福建省泉州市 电信

                               
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At this point return to the RA Assembly Guide or simply replace the motor cover and the power panel using the Phillips screws.

Take care when replacing the power panel not to trap any wires.
Remove the motor cover and check that the motor gears can easily move the axis by manually turning them by hand or using the mounts motors.
Run the mounts RA motor a full 360' to make
sure there is no binding at any point in the cycle.
If binding occurs you will need to readjust the set screws. This can be a long process to get the perfect balance between no play in the axis and smooth motor running.
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 楼主| steveyzh 发表于 2011-4-7 22:42 | 显示全部楼层 来自： 福建省泉州市 电信

                               
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Remove the soft rubber covers to reveal the end
of the worm shaft and float adjuster.		Loosen the float adjusted using either a small
jewellers screwdriver or a small allen key to locate into the adjusters slots. You should feel the some play in the axis. Now tighten the float adjuster down until any play disappears. The float adjuster should be in contact with the worm bearing but not overtight or else the axis will 'bind'		Replace the rubber worm float



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 楼主| steveyzh 发表于 2011-4-7 22:43 | 显示全部楼层 来自： 福建省泉州市 电信
本帖最后由 steveyzh 于 2011-4-7 22:45 编辑


                               
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2400 发表于 2011-4-7 23:02 | 显示全部楼层 来自： 广东省江门市 电信
上年我拆过，调整好后粗测导星+-1角秒
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skyczheng 发表于 2011-4-8 08:29 | 显示全部楼层 来自： 河北省石家庄市 电信
这个颜色的HEQ5国内没有吧
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