ASTRO DEVICES Scientific Twilight-II User manual

Copyright*©*2019,*Astro*Devices.*All*rights*reserved.**
*
1*
Explore Scientific Twilight-II mount: Encoders
Installation
Specifications:-
Altitude*Encoder*resolution:*655360*steps*per*revolution*
Azimuth*Encoder*resolution:*311296*steps*per*revolution*
Current*consumption:*20*mA*–*altitude*encoder,*20*mA*–*azimuth*encoder*
*
Note:*This*encoder*kit*is*compatible*with*the*pier*extension*for*the*mount.*
*
*
Do*not*subject*encoder*disks*to*magnetic*fields*as*it*may*affect*the*
magnetization*of*the*magnetic*multi-pole*rings.*
*
*
Please*make*sure*that*you*have*all*the*parts*included*in*the*kit:*
*
*
Please*remove*the*mount*head*from*the*tripod.*
*
*
*
*
*
*
*
*
* *

Copyright*©*2019,*Astro*Devices.*All*rights*reserved.**
*
2*
*
Azimuth encoder installation
*
Installing*the*azimuth*encoder*ring*on*the*mount*without*the*pier*extension.*
You*will*need*the*following*parts:*large*magnetic*encoder*ring,*azimuth*encoder*ring*
adapter*and*the*bottom*part*of*the*mount*head*
*
Put*the*encoder*ring*on*the*adapter*ring*as*shown*below:*

Copyright*©*2019,*Astro*Devices.*All*rights*reserved.**
*
3*
*
Push*it*down*all*the*way:*
*
Now*slide*it*over*the*bottom*part*of*the*mount*head:*
*
Look*at*the*bottom*and*make*sure*the*recess*in*the*adapter*ring*is*aligned*in*the*recess*
for*the*fixing*pin:*

Copyright*©*2019,*Astro*Devices.*All*rights*reserved.**
*
4*
*
Now*push*the*ring*all*the*way*down*until*its*top*surface*is*flush*with*the*outer*edge*of*
the*bottom*part*of*the*mount:*
*
Now*skip*the*next*section*of*installing*the*azimuth*encoder*ring*on*the*pier*extension.**
*
Installing*the*azimuth*encoder*ring*on*the*mount*with*the*pier*extension.*
*
You*will*need*the*following*parts:*

Copyright*©*2019,*Astro*Devices.*All*rights*reserved.**
*
5*
*
Slide*the*encoder*ring*over*the*pier*extension*as*shown*below:*
*
You*will*need*to*push*it*down*with*a*bit*of*force*–*you*can*use*a*piece*of*soft*wood*
timber*that*is*long*enough*to*push*on*opposite*sides*of*the*ring*(apply*it*on*the*top).*You*
will*need*to*push*it*down*until*the*top*of*the*ring*is*in*line*with*the*top*surface*of*the*
pier*extension:*

Copyright*©*2019,*Astro*Devices.*All*rights*reserved.**
*
6*
*
*
Now*you*will*need*to*install*the*altitude*encoder*ring.*You*will*need*the*following*parts:*
*
Loosen*four*set*screws*holding*one*of*the*dove*tail*bars.*It*does*not*matter*which*one*
but*you*need*to*loosen*all*four*set*screws*on*that*bar*(two*on*each*side):*

Copyright*©*2019,*Astro*Devices.*All*rights*reserved.**
*
7*
*
Now*remove*the*dove*tail*bar:*
*
You*will*now*need*the*altitude*encoder*reader:*
*
Slide*it*over*the*body*of*the*mount:*

Copyright*©*2019,*Astro*Devices.*All*rights*reserved.**
*
8*
*
Now*you*will*need*the*azimuth*encoder*reader:*
*
Slide*it*over*the*body*of*the*mount*align*its*bottom*surface*with*the*bottom*surface*of*
the*mount*and*tighten*the*clamp:*

Copyright*©*2019,*Astro*Devices.*All*rights*reserved.**
*
9*
*
*
*
Now*thread*two*set*screws*(on*the*left)*in:*

Copyright*©*2019,*Astro*Devices.*All*rights*reserved.**
*
10*
*
You*will*now*need*the*altitude*encoder*ring:*
*
Slide*it*over*the*bard*as*shown:*
*

Copyright*©*2019,*Astro*Devices.*All*rights*reserved.**
*
11*
Unscrew*the*two*set*screws:*
*
And*install*it*back*onto*the*shaft:*
*
And*tighten*the*set*screws:*

Copyright*©*2019,*Astro*Devices.*All*rights*reserved.**
*
12*
*
Now*position*the*altitude*encoder*reader*under*the*bar*and*slide*the*ring*until*the*
middle*of*the*ring*is*aligned*with*the*black*small*strip*on*the*reader:*
*
Tighten*the*set*screws*on*the*altitude*encoder*ring.*

Copyright*©*2019,*Astro*Devices.*All*rights*reserved.**
*
13*
*
*
Position*the*reader*as*close*as*possible*to*the*encoder*ring*without*touching*it:*
*
And*tighten*the*altitude*encoder*reader*clamp:*

Copyright*©*2019,*Astro*Devices.*All*rights*reserved.**
*
14*
*
*
Now*install*the*azimuth*washer*and*put*the*mount*head*on*bottm*part*of*the*mount*of*
onto*the*pier*extension:*
*

Copyright*©*2019,*Astro*Devices.*All*rights*reserved.**
*
15*
*
FINISHED*
*
*
*
*