SatNOGS Wiki - User contributions [en]

Satellite Operator Guide

2019-06-04T17:41:35Z

Jujun: /* Early stage of the project */

===Early stage of the project===
It's strongly advised to get in touch with the AMSAT of you country at the beginning of your project. It enables that the radio amateur requirements are taken in account at the early stage on your project. It avoids false expectations.
===Frequency===
First you need to know if you want to use a radio amateur frequency. This kind of frequency obeay to special rules : no commercial use, and the satellite must be used by the radio amateur community more than 20% of it time. The service from the satellite can be a repeater, or any other experiment.

You need to ask the AMSAT of your country to help you to get a radio amateur frequency coordination from IARU your allocation.
It will take time : usually between one year and six months.

If you don't ask for an IARU coordination, the launcher of your satellite will not allow you to launch the satellite. In the past this was allowed, but today it's no more possible.

===Open your transmissions===
To comply with regulations, you will need to make publicly available all the TM packet format, we advise you to use a Kaitai Struct for it.
You also need to give any gnuradio flow chart that are useful to receive your data, and any picture decoder software if available. The preferred programming language for them is python. It's also a good practice to give raw recording of transmission to be able to test all the software chain.

===Integration in the Satnogs network===
You need to create a post on the community forum with all this details :
- satellite name
- frequencies
- modulations
- link to TM format
- link to picture decoder

You are welcome to discuss with us on IRC (#satnogs on freenode)

Satellite Operator Guide

2019-06-04T15:52:01Z

Jujun:

=== Early stage of the project ===
You need to get in touch with the AMSAT of your country.

=== Frequency ===
First you need to know if you want to use a radio amateur frequency. This kind of frequency obeay to special rules : no commercial use, and the satellite must be used by the radio amateur community more than 20% of it time. The service from the satellite can be a repeater, or any other experiment.

You need to ask the AMSAT of your country to help you to get a radio amateur frequency coordination from IARU your allocation.
It will take time : usually between one year and six months.

If you don't ask for an IARU coordination, the launcher of your satellite will not allow you to launch the satellite. In the past this was allowed, but today it's no more possible.

=== Open your transmissions ===
To comply with regulations, you will need to make publicly available all the TM packet format, we advise you to use a Kaitai Struct for it.
You also need to give any gnuradio flow chart that are useful to receive your data, and any picture decoder software if available. The preferred programming language for them is python. It's also a good practice to give raw recording of transmission to be able to test all the software chain.

=== Integration in the Satnogs network ===
You need to create a post on the community forum with all this details :
- satellite name
- frequencies
- modulations
- link to TM format
- link to picture decoder

You are welcome to discuss with us on IRC (#satnogs on freenode)

Satellite Operator Guide

2019-06-04T15:47:31Z

Jujun:

Satellite Operator Guide

2019-06-04T15:45:49Z

Jujun: Created page with "=== Early stage of the project === You need to get in touch with the AMSAT of your country. === Frequency === First you need to know if you want to use a radioamateur frequ..."

=== Early stage of the project ===
You need to get in touch with the AMSAT of your country.

=== Frequency ===
First you need to know if you want to use a radioamateur frequency. This kind of frequency obeay to special rules : no commercial use, and the satellite must be used by the radioamateur community more than 20% of it time. The service from the satellite can be a reapeter, or any other experiment.

You need to ask the AMSAT of your country to help you to get a radioamatrur frequency coordination from IARU your allocation.
It will take time : usualy between one year and six months.

If you dont ask for an IARU coordiation, the launcher of your satellite will not allow you tu laucnh the satellite. In the past this was allowed, but today it's no more possible.

=== Open your transmissions ===
To comply with regulations, you will need to make publikly avaiable all the TM packet format, we advise you to use a Kaitai Struct for it.
You also need to give any gnuradio flow chart that are usefull to receive your data, and any picture decoder software if avaiable. The prefered programming language for them is python. It's also a good practice to give raw recording of transmission to be able to test all the software chain.

Academic Papers

2019-04-11T19:58:27Z

Jujun: /* Contribution to satellite mission */

This is a non-exhaustive list of research papers that cite the SatNOGS projects. Some papers are describing the project and its subprojects in-depth; others mention SatNOGS in passing. If you are familiar with any other research paper that mentions SatNOGS, don't hesitate to add it to the list!

== 2014 ==
'''[http://telsoc.org/sites/default/files/tja/pdf/ajtde_v2n4a73_telecoms_and_disaster_management.pdf Telecommunications and Disaster management:Participatory approaches and climate change adaptation]'''
Marta Poblet, Hartmut Fünfgeld, Ian McShane ''(RMIT University)''

== 2015 ==
'''[http://ieeexplore.ieee.org/abstract/document/7386227/ Identification, Location, and Reception of Low Earth Orbit Satellites (LEO) Signals]'''
Jose Eduardo Oros, Javier Trejo, Ante Salcedo ''(Digital Systems Department, Instituto Tecnologico Autonomo de Mexico)''

'''[http://digitalcommons.usu.edu/smallsat/2015/all2015/38/ Software Defined Radio (SDR) for Parallel Satellite Reception in Mobile/Deployable Ground Segments]'''
Mamatha R. Maheshwarappa, Christopher P. Bridges ''(University of Surrey)'' Mark Bowyer ''(Airbus Defence and Space Ltd)''

'''[https://www.tapr.org/pdf/DCC2015-SatNOGS-AD0CQ.pdf SatNOGS:Satellite Networked Open Ground Station]'''
Daniel J. White, Ph.D., AD/0CQ ''(Valparaiso University)'' Ioannis Giannelos, Agisilaos Zissimatos, Eleftherios Kosmas,
Dimitrios Papadeas, Pierros Papadeas, Matthaios Papamathaiou, Nikolaos Roussos, Vasileios Tsiligiannis, Ioannis Charitopoulos ''(Libre Space Foundation)''

'''[http://theses.lib.vt.edu/theses/available/etd-10192015-163016/ A Distributed Software Framework for the Virginia Tech Ground Station]'''
Paul U. David ''(Virginia Polytechnic Institute and State University)''

'''[https://arxiv.org/abs/1507.08565 Collaborative peer production as an alternative to hierarchical internet based business systems]'''
Ganesh G., Debanjum Singh Solanky, Govindaraj R ''(Central Electronics Engineering Research Institute (CEERI), Chennai''
Centre, CSIR Madras Complex)

'''[http://scholar.valpo.edu/cus/454/?utm_source=scholar.valpo.edu%2Fcus%2F454&utm_medium=PDF&utm_campaign=PDFCoverPages Valparaiso University College of Engineering SatNOGS Open-Sourced Satellite Ground Station:UHF and VHF Antenna Theory and Construction]''' Thomas M. Biedron, Jonathon Clabuesch ''(Valparaiso University)''

== 2016 ==

'''[http://ieeexplore.ieee.org/document/7500529/ Implementation of an Actor Framework for a Ground Station]''' Paul David, Seth Hitefield, Zach Leffke, William C. Headley, Robert W. McGwier ''(Virginia Polytechnic Institute and State University)''

'''[http://scholar.valpo.edu/cus/503/ SatNOGS Website Project]]''' Dylan Snyder, Adya Pandey, Caitlyn Marko, John Eric Tiessen, Dr. Nicholas Rosasco ''(Valparaiso University)''

'''[https://link.springer.com/chapter/10.1007/978-3-319-47289-8_15 Connecting the Dots: Informing Location-Based Services of Space Usage Rules]''' Pavel Andreevich Samsonov ''(Expertise Center for Digital MediaHasselt University - tUL – iMinds)''

'''[http://scholar.valpo.edu/cus/498/ SatNOGS Project]''' Ashley LeBlanc, John White, Chris Paradiso, Grace Freigang, Paul Flaten, Dan White, PhD ''(Valparaiso University)''

== 2017 ==

'''[http://ieeexplore.ieee.org/document/7500716/ System overview of the Virginia Tech Ground Station]''' Seth Hitefield, Zach Leffke, Michael Fowler, Robert W. McGwier ''(Virginia Polytechnic Institute and State University)''

'''[http://epubs.surrey.ac.uk/813388/ Software defined radio (SDR) architecture for concurrent multi-satellite communications.]''' Maheshwarappa Mamatha ''(University of Surrey)''

'''[https://halshs.archives-ouvertes.fr/halshs-01615472/ Les développeurs, une nouvelle classe sociale?]''' Paris Chrysos ''(Institut supérieur du commerce de Paris)''

'''[http://epubs.surrey.ac.uk/812783/ Improvements in CPU & FPGA Performance for Small Satellite SDR Applications]''' Mamatha R. Maheshwarappa, Christopher P. Bridges ''(University of Surrey)'' Mark Bowyer ''(Airbus Defence and Space Ltd)''

'''[http://nemertes.lis.upatras.gr/jspui/handle/10889/10553 Design, analysis and optimization of a micro-satellite for the study of lower thermosphere and re-entry conditions]''' Andreas G. Ampatzoglou ''(University of Patras)''

'''[http://www.sciencedirect.com/science/article/pii/S1877050917315338?via%3Dihub A Prototype of an Integrated Telemetry Receiving System with Volunteers: Designs of a Simple Receiver, a Protocol, and an Intelligent Information Processing]''' Masahiro Tokumitsu, Masaki Kusakabe, Souta Ogura ''(Department of Electrical and Control Engineering, National Institute of Technology, Yonago College,)'' Fumio Asai, Satoshi Aoki ''(Department of Computer Engineering, National Institute of Technology, Nara College)'' TakuTakada ''(Department of Social Design Engineering, National Institute of Technology, Kochi College)'' Makoto Wakabayashi ''(Department of Electrical and Computer Engineering, National Institute of Technology, Niihama College,)'' Yoshiteru Ishida ''(Department of Computer Science and Engineering, Toyohashi University of Technology)''

'''[http://hdl.handle.net/11250/2462967 Ground station considerations for the AMOS satellite programme]''' Øyvind Karlsen ''Norwegian University of Science and Technology'' (Masters Thesis)

'''[https://archive.fosdem.org/2017/schedule/event/satnogs/attachments/paper/1376/export/events/attachments/satnogs/paper/1376/fosdem_satnogs.pdf SDR for Space, the open way]''' Manolis Surligas, Kostis Triantafillakis and George Vardakis, ''Libre Space Foundation, University of Crete, Computer Science Department''

'''[https://oar.sci-gaia.eu/record/567/files/PUBLICATIONSSCIGAIA-2017-014.pdf Training the future ICT innovators on open science platform]''' A.Kondoro, D.Rwegasira, A.Kelati, H.Tenhunen ''KTH Royal Institute of Technology in Stockholm'' V. Taajamaa ''Turku University'' S. Naiman, N. Mvungi ''University of Dar es Salaam'' I. Ben Dhaou ''College of Engineering, Qassim University''

== 2018 (pre-published) ==

'''[https://link.springer.com/chapter/10.1007/978-3-319-56218-6_16 Doing Science with Nano-satellites]''' Gregorio A., Cuttin A., Fragiacomo M., Messerotti M. ''(Department of PhysicsUniversity of Trieste, PicoSaTs SRL, INAF, Osservatorio Astronomico di Trieste, Department of Engineering and ArchitectureUniversity of Trieste)''

= Contributions to satellites missions =
{| class="wikitable"
|+
!Satellite name
!Contribution from the SATNOGS project
|-
|Picsat
|telemetry/ACK and watch for revival
|-
|UPSat
|telemetry and watch for revival
|-
|Siriussat 1 and 2
|telemetry
|-
|Kicksat
|Sprites deployment observation
|}

Academic Papers

2019-04-11T19:57:54Z

Jujun: add contribution to sat missions

This is a non-exhaustive list of research papers that cite the SatNOGS projects. Some papers are describing the project and its subprojects in-depth; others mention SatNOGS in passing. If you are familiar with any other research paper that mentions SatNOGS, don't hesitate to add it to the list!

== 2014 ==
'''[http://telsoc.org/sites/default/files/tja/pdf/ajtde_v2n4a73_telecoms_and_disaster_management.pdf Telecommunications and Disaster management:Participatory approaches and climate change adaptation]'''
Marta Poblet, Hartmut Fünfgeld, Ian McShane ''(RMIT University)''

== 2015 ==
'''[http://ieeexplore.ieee.org/abstract/document/7386227/ Identification, Location, and Reception of Low Earth Orbit Satellites (LEO) Signals]'''
Jose Eduardo Oros, Javier Trejo, Ante Salcedo ''(Digital Systems Department, Instituto Tecnologico Autonomo de Mexico)''

'''[http://digitalcommons.usu.edu/smallsat/2015/all2015/38/ Software Defined Radio (SDR) for Parallel Satellite Reception in Mobile/Deployable Ground Segments]'''
Mamatha R. Maheshwarappa, Christopher P. Bridges ''(University of Surrey)'' Mark Bowyer ''(Airbus Defence and Space Ltd)''

'''[https://www.tapr.org/pdf/DCC2015-SatNOGS-AD0CQ.pdf SatNOGS:Satellite Networked Open Ground Station]'''
Daniel J. White, Ph.D., AD/0CQ ''(Valparaiso University)'' Ioannis Giannelos, Agisilaos Zissimatos, Eleftherios Kosmas,
Dimitrios Papadeas, Pierros Papadeas, Matthaios Papamathaiou, Nikolaos Roussos, Vasileios Tsiligiannis, Ioannis Charitopoulos ''(Libre Space Foundation)''

'''[http://theses.lib.vt.edu/theses/available/etd-10192015-163016/ A Distributed Software Framework for the Virginia Tech Ground Station]'''
Paul U. David ''(Virginia Polytechnic Institute and State University)''

'''[https://arxiv.org/abs/1507.08565 Collaborative peer production as an alternative to hierarchical internet based business systems]'''
Ganesh G., Debanjum Singh Solanky, Govindaraj R ''(Central Electronics Engineering Research Institute (CEERI), Chennai''
Centre, CSIR Madras Complex)

'''[http://scholar.valpo.edu/cus/454/?utm_source=scholar.valpo.edu%2Fcus%2F454&utm_medium=PDF&utm_campaign=PDFCoverPages Valparaiso University College of Engineering SatNOGS Open-Sourced Satellite Ground Station:UHF and VHF Antenna Theory and Construction]''' Thomas M. Biedron, Jonathon Clabuesch ''(Valparaiso University)''

== 2016 ==

'''[http://ieeexplore.ieee.org/document/7500529/ Implementation of an Actor Framework for a Ground Station]''' Paul David, Seth Hitefield, Zach Leffke, William C. Headley, Robert W. McGwier ''(Virginia Polytechnic Institute and State University)''

'''[http://scholar.valpo.edu/cus/503/ SatNOGS Website Project]]''' Dylan Snyder, Adya Pandey, Caitlyn Marko, John Eric Tiessen, Dr. Nicholas Rosasco ''(Valparaiso University)''

'''[https://link.springer.com/chapter/10.1007/978-3-319-47289-8_15 Connecting the Dots: Informing Location-Based Services of Space Usage Rules]''' Pavel Andreevich Samsonov ''(Expertise Center for Digital MediaHasselt University - tUL – iMinds)''

'''[http://scholar.valpo.edu/cus/498/ SatNOGS Project]''' Ashley LeBlanc, John White, Chris Paradiso, Grace Freigang, Paul Flaten, Dan White, PhD ''(Valparaiso University)''

== 2017 ==

'''[http://ieeexplore.ieee.org/document/7500716/ System overview of the Virginia Tech Ground Station]''' Seth Hitefield, Zach Leffke, Michael Fowler, Robert W. McGwier ''(Virginia Polytechnic Institute and State University)''

'''[http://epubs.surrey.ac.uk/813388/ Software defined radio (SDR) architecture for concurrent multi-satellite communications.]''' Maheshwarappa Mamatha ''(University of Surrey)''

'''[https://halshs.archives-ouvertes.fr/halshs-01615472/ Les développeurs, une nouvelle classe sociale?]''' Paris Chrysos ''(Institut supérieur du commerce de Paris)''

'''[http://epubs.surrey.ac.uk/812783/ Improvements in CPU & FPGA Performance for Small Satellite SDR Applications]''' Mamatha R. Maheshwarappa, Christopher P. Bridges ''(University of Surrey)'' Mark Bowyer ''(Airbus Defence and Space Ltd)''

'''[http://nemertes.lis.upatras.gr/jspui/handle/10889/10553 Design, analysis and optimization of a micro-satellite for the study of lower thermosphere and re-entry conditions]''' Andreas G. Ampatzoglou ''(University of Patras)''

'''[http://www.sciencedirect.com/science/article/pii/S1877050917315338?via%3Dihub A Prototype of an Integrated Telemetry Receiving System with Volunteers: Designs of a Simple Receiver, a Protocol, and an Intelligent Information Processing]''' Masahiro Tokumitsu, Masaki Kusakabe, Souta Ogura ''(Department of Electrical and Control Engineering, National Institute of Technology, Yonago College,)'' Fumio Asai, Satoshi Aoki ''(Department of Computer Engineering, National Institute of Technology, Nara College)'' TakuTakada ''(Department of Social Design Engineering, National Institute of Technology, Kochi College)'' Makoto Wakabayashi ''(Department of Electrical and Computer Engineering, National Institute of Technology, Niihama College,)'' Yoshiteru Ishida ''(Department of Computer Science and Engineering, Toyohashi University of Technology)''

'''[http://hdl.handle.net/11250/2462967 Ground station considerations for the AMOS satellite programme]''' Øyvind Karlsen ''Norwegian University of Science and Technology'' (Masters Thesis)

'''[https://archive.fosdem.org/2017/schedule/event/satnogs/attachments/paper/1376/export/events/attachments/satnogs/paper/1376/fosdem_satnogs.pdf SDR for Space, the open way]''' Manolis Surligas, Kostis Triantafillakis and George Vardakis, ''Libre Space Foundation, University of Crete, Computer Science Department''

'''[https://oar.sci-gaia.eu/record/567/files/PUBLICATIONSSCIGAIA-2017-014.pdf Training the future ICT innovators on open science platform]''' A.Kondoro, D.Rwegasira, A.Kelati, H.Tenhunen ''KTH Royal Institute of Technology in Stockholm'' V. Taajamaa ''Turku University'' S. Naiman, N. Mvungi ''University of Dar es Salaam'' I. Ben Dhaou ''College of Engineering, Qassim University''

== 2018 (pre-published) ==

'''[https://link.springer.com/chapter/10.1007/978-3-319-56218-6_16 Doing Science with Nano-satellites]''' Gregorio A., Cuttin A., Fragiacomo M., Messerotti M. ''(Department of PhysicsUniversity of Trieste, PicoSaTs SRL, INAF, Osservatorio Astronomico di Trieste, Department of Engineering and ArchitectureUniversity of Trieste)''

= Contribution to satellite mission =
{| class="wikitable"
|+
!Satellite name
!Contribution from the SATNOGS project
|-
|Picsat
|telemetry/ACK and watch for revival
|-
|UPSat
|telemetry and watch for revival
|-
|Siriussat 1 and 2
|telemetry
|-
|Kicksat
|Sprites deployment observation
|}

RF noise

2018-05-30T20:56:50Z

Jujun:

If you notice a noise in the waterfall every time motors are spinning, you will need to :

- Twist each pair or the motor wire

- Add properly grounding

- Add capacitor to the DC input of drivers

- wrap the motors wire with adhesite aluminum and then connect it to GND on driver side

- add ferites to motors wires

[[File:Rf_noise.png]]

File:Rf noise.png

2018-05-30T20:56:06Z

Jujun: How a waterfall looks like when there is motors noise.

How a waterfall looks like when there is motors noise.

RF noise

2018-05-30T20:09:14Z

Jujun:

RF noise

2018-05-30T19:46:04Z

Jujun: Created page with "If you notice a noise in the waterfall every time motors are spinning, you will need to : - Twist each pair or the motor wire - Add properly grounding - Add capacitor to the..."

If you notice a noise in the waterfall every time motors are spinning, you will need to :

- Twist each pair or the motor wire
- Add properly grounding
- Add capacitor to the DC input of drivers

Metal antenna rotator

2018-05-28T12:13:00Z

Jujun: /* Test and setup */

To build this metal antenna rotator you will need a welder.

== Bill of materials ==
{| {{table}}
| align="center" style="background:#f0f0f0;"|'''Part'''
| align="center" style="background:#f0f0f0;"|'''Qty'''
| align="center" style="background:#f0f0f0;"|'''Source'''
| align="center" style="background:#f0f0f0;"|'''Price per Unit ($)'''
|-
| Nema23 stepper motor - Wormgear 60:1 || 2 || [https://aliexpress.com/item/Ratio-20-1-self-lock-High-Torque-L56mm-NEMA23-3A-RV30-Turbine-Worm-Gearbox-Geared/32681621498.html][https://aliexpress.com/item/Ratio-20-1-self-lock-High-Torque-L112mm-NEMA23-4-2A-RV30-Turbine-Worm-Gearbox/32681645351.html] ||
|-
| Bearing for the az axis 100x135x25 mm || 1 || [https://aliexpress.com/item/51120-Thrust-Bearing-100x135x25-mm-ABEC-1-1-PC-Axial-51120-Thrust-Ball-Bearings-8120/32813388761.html] ||
|-
| Stepper motor driver || 2 || [https://aliexpress.com/item/2-Phase-Stepper-Driver-MA860-DSP-24V-80VDC-or-VAC16-70VAC-Output-6A-Current-NEMA-34/32785076340.html] ||
|-
|}

== Communication test and setup ==
<nowiki>rotctl -r /dev/ttyUSB1 -m 202 -s 19200 -t10</nowiki>

-t is to use \n as end of cmd

To test you will need to :
<nowiki>type P<enter></nowiki>

then give position

The motors should move, if not check connexions.

Then you have to check that the endstop are working:

<nowiki>type IP1<enter></nowiki>

<nowiki>type IP2<enter></nowiki>

If the result end with ',0', and the endstop is not activated, its good. (if it's not good, revese them in the config)

If the two endstops are at 0 when reset, the homing will be peformed.
Homing is alway in the opposide way of the motor (-max angle)

Metal antenna rotator

2018-05-28T12:12:31Z

Jujun:

To build this metal antenna rotator you will need a welder.

== Bill of materials ==
{| {{table}}
| align="center" style="background:#f0f0f0;"|'''Part'''
| align="center" style="background:#f0f0f0;"|'''Qty'''
| align="center" style="background:#f0f0f0;"|'''Source'''
| align="center" style="background:#f0f0f0;"|'''Price per Unit ($)'''
|-
| Nema23 stepper motor - Wormgear 60:1 || 2 || [https://aliexpress.com/item/Ratio-20-1-self-lock-High-Torque-L56mm-NEMA23-3A-RV30-Turbine-Worm-Gearbox-Geared/32681621498.html][https://aliexpress.com/item/Ratio-20-1-self-lock-High-Torque-L112mm-NEMA23-4-2A-RV30-Turbine-Worm-Gearbox/32681645351.html] ||
|-
| Bearing for the az axis 100x135x25 mm || 1 || [https://aliexpress.com/item/51120-Thrust-Bearing-100x135x25-mm-ABEC-1-1-PC-Axial-51120-Thrust-Ball-Bearings-8120/32813388761.html] ||
|-
| Stepper motor driver || 2 || [https://aliexpress.com/item/2-Phase-Stepper-Driver-MA860-DSP-24V-80VDC-or-VAC16-70VAC-Output-6A-Current-NEMA-34/32785076340.html] ||
|-
|}

== Test and setup ==
<nowiki>rotctl -r /dev/ttyUSB1 -m 202 -s 19200 -t10</nowiki>

-t is to use \n as end of cmd

To test you will need to :
<nowiki>type P<enter></nowiki>

then give position

The motors should move, if not check connexions.

Then you have to check that the endstop are working:

<nowiki>type IP1<enter></nowiki>

<nowiki>type IP2<enter></nowiki>

If the result end with ',0', and the endstop is not activated, its good. (if it's not good, revese them in the config)

If the two endstops are at 0 when reset, the homing will be peformed.
Homing is alway in the opposide way of the motor (-max angle)

Metal antenna rotator

2018-05-28T12:12:13Z

Jujun:

To build this metal antenna rotator you will need a welder.

== Bill of materials ==
{| {{table}}
| align="center" style="background:#f0f0f0;"|'''Part'''
| align="center" style="background:#f0f0f0;"|'''Qty'''
| align="center" style="background:#f0f0f0;"|'''Source'''
| align="center" style="background:#f0f0f0;"|'''Price per Unit ($)'''
|-
| Nema23 stepper motor - Wormgear 60:1 || 2 || [https://aliexpress.com/item/Ratio-20-1-self-lock-High-Torque-L56mm-NEMA23-3A-RV30-Turbine-Worm-Gearbox-Geared/32681621498.html][https://aliexpress.com/item/Ratio-20-1-self-lock-High-Torque-L112mm-NEMA23-4-2A-RV30-Turbine-Worm-Gearbox/32681645351.html] ||
|-
| Bearing for the az axis 100x135x25 mm || 1 || [https://aliexpress.com/item/51120-Thrust-Bearing-100x135x25-mm-ABEC-1-1-PC-Axial-51120-Thrust-Ball-Bearings-8120/32813388761.html] ||
|-
| Stepper motor driver || 2 || [https://aliexpress.com/item/2-Phase-Stepper-Driver-MA860-DSP-24V-80VDC-or-VAC16-70VAC-Output-6A-Current-NEMA-34/32785076340.html] ||
|-
|}

== Test and setup ==
<nowiki>rotctl -r /dev/ttyUSB1 -m 202 -s 19200 -t10</nowiki>

-t is to use \n as end of cmd

To test you will need to :
<nowiki>type P<enter></nowiki>

then give position

The motors should move, if not check connexions.

Then you have to check that the endstop are working:
<nowiki>type IP1<enter></nowiki>
<nowiki>type IP2<enter></nowiki>

If the result end with ',0', and the endstop is not activated, its good. (if it's not good, revese them in the config)

If the two endstops are at 0 when reset, the homing will be peformed.
Homing is alway in the opposide way of the motor (-max angle)

Metal antenna rotator

2018-05-28T12:11:27Z

Jujun:

To build this metal antenna rotator you will need a welder.

== Bill of materials ==
{| {{table}}
| align="center" style="background:#f0f0f0;"|'''Part'''
| align="center" style="background:#f0f0f0;"|'''Qty'''
| align="center" style="background:#f0f0f0;"|'''Source'''
| align="center" style="background:#f0f0f0;"|'''Price per Unit ($)'''
|-
| Nema23 stepper motor - Wormgear 60:1 || 2 || [https://aliexpress.com/item/Ratio-20-1-self-lock-High-Torque-L56mm-NEMA23-3A-RV30-Turbine-Worm-Gearbox-Geared/32681621498.html][https://aliexpress.com/item/Ratio-20-1-self-lock-High-Torque-L112mm-NEMA23-4-2A-RV30-Turbine-Worm-Gearbox/32681645351.html] ||
|-
| Bearing for the az axis 100x135x25 mm || 1 || [https://aliexpress.com/item/51120-Thrust-Bearing-100x135x25-mm-ABEC-1-1-PC-Axial-51120-Thrust-Ball-Bearings-8120/32813388761.html] ||
|-
| Stepper motor driver || 2 || [https://aliexpress.com/item/2-Phase-Stepper-Driver-MA860-DSP-24V-80VDC-or-VAC16-70VAC-Output-6A-Current-NEMA-34/32785076340.html] ||
|-
|}

== Test and setup ==
<nowiki>rotctl -r /dev/ttyUSB1 -m 202 -s 19200 -t10</nowiki>

-t is to use \n as end of cmd

To test you will need to :
<nowiki>type P<enter></nowiki>

then give position

The motors should move, if not check connexions.

Then you have to check that the endstop are working:
<nowiki>type IP1<enter>
type IP2<enter></nowiki>

If the result end with ',0', and the endstop is not activated, its good. (if it's not good, revese them in the config)

If the two endstops are at 0 when reset, the homing will be peformed.
Homing is alway in the opposide way of the motor (-max angle)

Metal antenna rotator

2018-04-28T22:04:24Z

Jujun:

To build this metal antenna rotator you will need a welder.

== Bill of materials ==
{| {{table}}
| align="center" style="background:#f0f0f0;"|'''Part'''
| align="center" style="background:#f0f0f0;"|'''Qty'''
| align="center" style="background:#f0f0f0;"|'''Source'''
| align="center" style="background:#f0f0f0;"|'''Price per Unit ($)'''
|-
| Nema23 stepper motor - Wormgear 60:1 || 2 || [https://aliexpress.com/item/Ratio-20-1-self-lock-High-Torque-L56mm-NEMA23-3A-RV30-Turbine-Worm-Gearbox-Geared/32681621498.html][https://aliexpress.com/item/Ratio-20-1-self-lock-High-Torque-L112mm-NEMA23-4-2A-RV30-Turbine-Worm-Gearbox/32681645351.html] ||
|-
| Bearing for the az axis 100x135x25 mm || 1 || [https://aliexpress.com/item/51120-Thrust-Bearing-100x135x25-mm-ABEC-1-1-PC-Axial-51120-Thrust-Ball-Bearings-8120/32813388761.html] ||
|-
| Stepper motor driver || 2 || [https://aliexpress.com/item/2-Phase-Stepper-Driver-MA860-DSP-24V-80VDC-or-VAC16-70VAC-Output-6A-Current-NEMA-34/32785076340.html] ||
|-
|}

== Test qnd setup ==

rotctl -r /dev/ttyUSB1 -m 202 -s 19200 -t10

-t is to use \n as end of cmd

To test you will need to :

type P<enter>
then give position

The motors should move, if not check connexions.

Then you have to check that the endstop ae working:
type IP1<enter>
type IP2<enter>

If the result end with ',0', and the endstop is not activated, its good. (if it's not good, revese them in the config)

If the two endstops are at 0 when reset, the homing will be peformed.
Homing is alway in the opposide way of the motor (-max angle)

Metal antenna rotator

2018-04-05T09:08:08Z

Jujun:

Metal antenna rotator

2018-03-30T17:26:39Z

Jujun: Created page with "To build this metal antenna rotator you will need a welder. == Bill of materials == Nema23 stepper motor Wormgear 60:1 aliexpress.com/item/Ratio-20-1-self-lock-High-Torque-..."

To build this metal antenna rotator you will need a welder.

== Bill of materials ==
Nema23 stepper motor
Wormgear 60:1
aliexpress.com/item/Ratio-20-1-self-lock-High-Torque-L56mm-NEMA23-3A-RV30-Turbine-Worm-Gearbox-Geared/32681621498.html
aliexpress.com/item/Ratio-20-1-self-lock-High-Torque-L112mm-NEMA23-4-2A-RV30-Turbine-Worm-Gearbox/32681645351.html

Bearing for the az axis 100x135x25 mm : aliexpress.com/item/51120-Thrust-Bearing-100x135x25-mm-ABEC-1-1-PC-Axial-51120-Thrust-Ball-Bearings-8120/32813388761.html

Stepper motor driver : aliexpress.com/item/2-Phase-Stepper-Driver-MA860-DSP-24V-80VDC-or-VAC16-70VAC-Output-6A-Current-NEMA-34/32785076340.html