SKY-WATCHER Saxon classic User manual

SkyWatcher: Encoders Installation

This*kit*is*suitable*for*SkyWatcher/Saxon*classic*6”-16”*and*Collapsible*up*to*16”.*

Please unpack all parts from the encoder kit. Make sure that your kit contains the following parts:

The*following*parts*are*only*for*the*10”:*

********** *

Encoder(resolutions:((

Azimuth:(311,296(steps(

Altitude:(6”-10”(–(842,700(steps,(12”(–(943,000(steps,(14”-16”(–(1,308,000(steps(

Current(consumption:(Azimuth(-(20(mA,(Altitude(–(20(mA(

Azimuth encoder installation

You*will*need*the*following*parts*and*tools:*

The*azimuth*pivot*bolt*needs*to*be*replaced*with*the*supplied*azimuth*pivot*bolt.*Use*the*socket*

wrench*and*the*shifter*tool/adjustable*spanner*to*remove*the*pivot*bolt*.*You*also*need*to*remove*

the*existing*plastic*bushing*from*the*hole.*

Put*the*washer*and*the*plastic*bushing*on*the*pivot*bolt*and*insert*it*into*the*hole*

Put*the*rocker*box*on*its*side*and*install*the*aluminium*plate*on*the*pivot*bolt.*Drill*holes*for*the*

screws*using*the*supplied*drill*bit.**

Use*the*supplied*screws*to*secure*the*plate.**

Tighten*the*pivot*bolt*making*sure*the*rocker*box*still*rotates*as*usual.*

Tighten*two*set/grub*screws*using*supplied*Allen*key*

Now*install*the*tangent*arm*with*the*encoder*reader*on*the*pivot*bolt*

Use*a*pencil*to*mark*the*middle*of*the*slot*at*the*end*of*the*tangent*arm*on*the*rocker*box*(for*the*

placement*of*the*anchor*bolt)*

Swing*the*tangent*arm*away*from*the*marked*spot*and*put*the*anchor*bolt*with*the*foot*on*the*

marked*spot.*Then*use*the*pencil*to*mark*one*of*the*holes*

Predrill*the*hole*for*the*screw*

Fix*plastic*foot*to*the*rocker*box*with*three*screws*provided*

Remove*the*anchor*bolt*using*a*flat*head*screw*driver*

Position*the*slot*of*the*tangent*arm*over*the*foot*and*install*the*anchor*bolt*

Slide*the*two*thin*washers*over*the*top*of*the*pivot*bolt*and*install*the*encoder*disk*–*it*is*press*

fitted*onto*the*pivot*bolt’s*top*

Altitude Encoder Installation (6”-8”, 12”-16”)

For*the*installation*of*the*altitude*encoder*on*10”*version*only*refer*to*the*next*section*of*

this*document.*

The*following*parts*are*required*to*install*the*altitude*encoder:*

The*altitude*encoder*can*be*installed*on*either*altitude*bearing.*However*the*encoder*reader*will*be*

easier*to*install*on*the*left*side*wall*of*the*rocker*box*–*left*side*wall*shown*in*the*photo*below.*

The*encoder*reader*is*installed*on*the*front*bearing*cylinder*(the*same*side*where*the*wall*

connecting*two*side*walls*of*the*rocker*box*is).**

Start*with*removing*the*OTA*from*the*rocker*box.*Then*clean*the*front*half*of*the*left*altitude*

bearing*with*an*alcohol*wipe:*

Then*put*the*OTA*back*in.*Lower*the*telescope*down*and*slide*the*reader*over*the*front*bearing*

cylinder:*

Now*you*will*need*either*a*pencil*or*a*safety*pin*to*put*a*marking*on*the*altitude*bearing.*You*need*

to*mark*where*the*magnetic*tape*will*be*installed.*

Position*the*telescope*vertically*or*even*past*90˚*so*the*bottom*of*the*OTA*will*touch*the*front*wall*

of*the*rocker*box:*

10*

Now*mark*the*altitude*bearing*just*past*the*body*of*the*encoder*reader*with*a*pencil*(it*might*be*

easier*to*use*something*like*a*safety*pin*to*put*a*small*scratch*instead):*

Now*remove*the*OTA*from*the*rocker*box.*Remove*the*protective*paper*from*the*back*of*the*

magnetic*tape:*

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