Date   

Random N / S direction change Onstep Android app.

Dahle
 

‌Hello,
I just saw when using the Onstep app on Android (tablet) that the N / S direction was random.
Let me explain: I press the N key, the telescope goes south. I press the S key, the telescope goes south, I press the N key again, the telescope goes north. After all is back to normal. The case is random and does not always do.
Sometimes it is enough to press the E / W keys (which have no problem) for this to happen again.

Any ideas?

Thank you!


Re: Converting Meade ETX125

George Cushing
 

I'd loose the the old DH gearing and adapt some LX90/LS worm gears.


Wemos+CNC shield s109 stepper driver no connection #wemos

lorelupo@...
 

Hi all, I need some help I'm trying to use s109 stepper driver, but when  I plug in the CNC shield the drivers I can't connect via Bluetooth or WiFi, even I can't see the onstep Bluetooth or WiFi, it's like that the wemos get stucked.
I have used lv8729 with no problems at all or others drivers, really don't need to use the s109 but just want to find out what's is going on.
Thanks


Re: Converting Meade ETX125

George Cushing
 

Oh sure, take this TerraBeam thing, please!



Re: CGE conversion

George Cushing
 

The pinouts are described on page 2 of the datasheet.


Re: Onstep total beginner question #EQ3 #bluepill

George Cushing
 

There is no answer for this other than "it depends." 

It depends:
  1. On the design of the mount 
  2. On the end of the worm where the drive is connected. 
  3. The drive direction setting it the configuration file.
  4. The manner in which the controller to drive conductors are run
Generally, the controller switch at 3 o'clock is the one used to correct for westward drift, that is it moves the FOV to the west. If you are standing to the south of a German mount, the scope "should" move CCW.


Re: Meade RCX400 Control board

George Cushing
 

The RX400 is a DC servo based system. I've been playing with the idea of converting a LS6/8 mount to OnStep. The mounts share drives. I pulled one apart the other day. I think something like a NEMA 11 stepper with a 5:1 gear reducer and belts and pulleys would work for the LS.



Re: CGE conversion

alekstad46@...
 

On Tue, Aug 3, 2021 at 12:08 AM, George Cushing wrote:
According to the RAMPS14 pinmap
I saw it. Connect motor windings to these pins? Where are these pins on the board?


Onstep total beginner question #EQ3 #bluepill

Francois94
 

Hello all ,
as a total beginner in Onstep , and generally speaking in goto , i have certainly a stupid question :
Assuming my onstep conf is ok , north hemisphere, lat/long , utc offset , date&time correctly documented , mount tuned to the good angle and pointing the north ,home position set .
If i stand in front of the mount , counterweight just in front of me , and i push the right button on the SHC , should the RA axis turn clockwise or anticlokwise ?
Same question for the DEC , if i push the up button , should it turn clockwise or anticlokwise ?

This question may looks stup for lots of you , but on my side , doing a lot of tests during the day as the weather is really horrible , i'm often changing time to simulate a later one and match with stellarium and sometimes , pushing the same button on the controler launch the mount in one direction and sometimes in the other so i'm a bit lost . I've understood that for goto , it will calculate the "shortest" path to the target , according the current position so i can start on one side or opposite , but for manual operation , i don't really know .

Thanks in advance for reading me and answering my newbie question .


Re: 10 Inch GSO DOB planning phase questions #dob

Dave Schwartz
 

I don't know why autocorrect changed 'Vref' to 'Greg' but those are the times we live in 🤔.


On August 3, 2021 1:39:33 a.m. EDT, Dave Schwartz <Dave.Schwartz@...> wrote:
The BigTreeTech TMC5160 V1.2 work just great in the S6. Microstepping is set separately for each of tracking and slewing in the Config.h file as is the motor current (directly, not via Greg and a pot... the TMC5160 doesn't even have a pot). OnStep sets these parameters in the driver over the SPI interface.

On August 2, 2021 11:19:31 p.m. EDT, Samuel.anderson123@... wrote:
Thanks, I might go for the TMC5160 don't seem to be too expensive and i'd rather overate the driver. I haven't looked into how onstep works with the motors/drivers yet.
Can you just set the microsteps in a config file. i.e 128X or 64X? And can you set it to differently for tracking and slewing?
Also you mentioned 40-50% current of the maximum, how is the current set? In this example the Nema 17 max current is 1.68A @ 2.8V effective resistant of 1.66Ohms.
In order to get 50% current (840mA) i would need to set the output voltage to 1.39V somewhere. Is this done in onstep?

Thanks


 

 


On Sat, Jul 31, 2021 at 03:01 AM, <mdwsmith@...> wrote:
S109 are quite high current you may be able to get cheaper LV8729s, depending on the current draw of your motor - best practice is to use only 40-50% of the max motor current from wiki recommendations.

If you want a better compromise with goto's and accuracy TMC2130 (
must be SPI version) or the higher current TMC5160 - these offer mode switching from high microsteps for accuracy tracking to low microsteps for goto.  Trade off is higher cost - maybe twice as expensive.

see https://onstep.groups.io/g/main/wiki/4464

--
Sent from my Android device with K-9 Mail. Please excuse my brevity.
--
Sent from my Android device with K-9 Mail. Please excuse my brevity.


Re: 10 Inch GSO DOB planning phase questions #dob

Dave Schwartz
 

The BigTreeTech TMC5160 V1.2 work just great in the S6. Microstepping is set separately for each of tracking and slewing in the Config.h file as is the motor current (directly, not via Greg and a pot... the TMC5160 doesn't even have a pot). OnStep sets these parameters in the driver over the SPI interface.


On August 2, 2021 11:19:31 p.m. EDT, Samuel.anderson123@... wrote:
Thanks, I might go for the TMC5160 don't seem to be too expensive and i'd rather overate the driver. I haven't looked into how onstep works with the motors/drivers yet.
Can you just set the microsteps in a config file. i.e 128X or 64X? And can you set it to differently for tracking and slewing?
Also you mentioned 40-50% current of the maximum, how is the current set? In this example the Nema 17 max current is 1.68A @ 2.8V effective resistant of 1.66Ohms.
In order to get 50% current (840mA) i would need to set the output voltage to 1.39V somewhere. Is this done in onstep?

Thanks


 

 


On Sat, Jul 31, 2021 at 03:01 AM, <mdwsmith@...> wrote:
S109 are quite high current you may be able to get cheaper LV8729s, depending on the current draw of your motor - best practice is to use only 40-50% of the max motor current from wiki recommendations.

If you want a better compromise with goto's and accuracy TMC2130 (
must be SPI version) or the higher current TMC5160 - these offer mode switching from high microsteps for accuracy tracking to low microsteps for goto.  Trade off is higher cost - maybe twice as expensive.

see https://onstep.groups.io/g/main/wiki/4464

--
Sent from my Android device with K-9 Mail. Please excuse my brevity.


Re: 10 Inch GSO DOB planning phase questions #dob

Dave Schwartz
 

Yes, I have a Neo-7m and Khalid has an ATGM366H GPS module connected to our respective S6 boards (via serial3 on the EXP1 connector). The ATGM366H module is actually preferred because it doesn't interfere with the S6's entry into flash mode. You would need some way to turn off the power to the Neo-7m in order to flash the S6 but the ATGM366H doesn't require that.


On August 2, 2021 11:05:54 p.m. EDT, Samuel.anderson123@... wrote:
Hi Dave,

Thanks for the detailed response. I can get all of that from ALIexpress, i'll copy. Do you ever get a gps to work with the Fysetc 2.0?

On Sat, Jul 31, 2021 at 02:20 AM, Dave Schwartz wrote:
Considering your 'futures' list, I would recommend the FYSETC S6 2.0 as
the controller board. Its plenty fast, has 3 additional driver spots for
rotator/focusers, has onboard MOSFETs and screw terminals for directly
connecting dew heaters plus you can connect a GPS, ESP32 module for
simultaneous WiFI/Bluetooth operation, a BME280_SPI for ambient weather
sensing and dew heater temperature sensors for automatic heater power
control. I've done all of the above with an S6 except for the rotator.

On 2021-07-30 1:04 a.m., Samuel.anderson123@... wrote:
Hi Guys,

I've started my Dob conversion using Prosperguy thingiverse printed
gears. I have to do some fusion3D mods for it to fit my scope, never
used it, bit of a learning curve.
Waiting for some stuff that's on order etc. In the mean time I was
just trying to work out microcontroller, drivers, motors etc.
Could someone please check my proposed design below and let me know
your thoughts. Scope is a 10 inch GSO dobsonian.

1. The big gears (both ALt and AZ) will be 420 teeth and g2T belt
driven to a 20T smaller gear giving 21 reduction. (Happy to change the
smaller gear, don't know how to redesign the larger one)
2. I propose to use Nema 17 (200step) with integrated 100:1 gear box
to yield a total reduction of 2100. (happy to change if there's a
better option)
3. S109 drivers (Happy to change)
4. Teensy 4.0 (600Mhz) - fasters better? (Happy to change)
5. Some sort of wifi card. (Whatever Works)

I'm happy to design and make my own custom Circuit board and power supply.

What I want to use it for:

Lucky Imaging with high resolution tracking, happy for slow slew
speeds if it gets me more accuracy.
If I can also be greedy and have fast slew times of 5 degrees per
second that would be cool too, but not necessary.

How I want to use it:

Link Iphone via wifi with the tracking app to update time/location.
Open Sky safari for goto commands

What I'd like the possibility of upgrading:

Adding rotator for the camera
Adding Blutooth for that joytick control
Adding GPS for auto Location/time updating.
Adding humidity/temp sensor to calculate dewpoint and switching
heaters on/off (just the switching command is fine i'll work out the
power side)


Apologies in advance if any of the above is completely stupid and
won't work for obvious reasons.

Thanks.


















--
Sent from my Android device with K-9 Mail. Please excuse my brevity.


Re: 10 Inch GSO DOB planning phase questions #dob

Samuel.anderson123@...
 

Thanks, I might go for the TMC5160 don't seem to be too expensive and i'd rather overate the driver. I haven't looked into how onstep works with the motors/drivers yet.
Can you just set the microsteps in a config file. i.e 128X or 64X? And can you set it to differently for tracking and slewing?
Also you mentioned 40-50% current of the maximum, how is the current set? In this example the Nema 17 max current is 1.68A @ 2.8V effective resistant of 1.66Ohms.
In order to get 50% current (840mA) i would need to set the output voltage to 1.39V somewhere. Is this done in onstep?

Thanks


 

 


On Sat, Jul 31, 2021 at 03:01 AM, <mdwsmith@...> wrote:
S109 are quite high current you may be able to get cheaper LV8729s, depending on the current draw of your motor - best practice is to use only 40-50% of the max motor current from wiki recommendations.

If you want a better compromise with goto's and accuracy TMC2130 (
must be SPI version) or the higher current TMC5160 - these offer mode switching from high microsteps for accuracy tracking to low microsteps for goto.  Trade off is higher cost - maybe twice as expensive.

see https://onstep.groups.io/g/main/wiki/4464


Re: 10 Inch GSO DOB planning phase questions #dob

Samuel.anderson123@...
 

Hi Dave,

Thanks for the detailed response. I can get all of that from ALIexpress, i'll copy. Do you ever get a gps to work with the Fysetc 2.0?


On Sat, Jul 31, 2021 at 02:20 AM, Dave Schwartz wrote:
Considering your 'futures' list, I would recommend the FYSETC S6 2.0 as
the controller board. Its plenty fast, has 3 additional driver spots for
rotator/focusers, has onboard MOSFETs and screw terminals for directly
connecting dew heaters plus you can connect a GPS, ESP32 module for
simultaneous WiFI/Bluetooth operation, a BME280_SPI for ambient weather
sensing and dew heater temperature sensors for automatic heater power
control. I've done all of the above with an S6 except for the rotator.

On 2021-07-30 1:04 a.m., Samuel.anderson123@... wrote:
Hi Guys,

I've started my Dob conversion using Prosperguy thingiverse printed
gears. I have to do some fusion3D mods for it to fit my scope, never
used it, bit of a learning curve.
Waiting for some stuff that's on order etc. In the mean time I was
just trying to work out microcontroller, drivers, motors etc.
Could someone please check my proposed design below and let me know
your thoughts. Scope is a 10 inch GSO dobsonian.

1. The big gears (both ALt and AZ) will be 420 teeth and g2T belt
driven to a 20T smaller gear giving 21 reduction. (Happy to change the
smaller gear, don't know how to redesign the larger one)
2. I propose to use Nema 17 (200step) with integrated 100:1 gear box
to yield a total reduction of 2100. (happy to change if there's a
better option)
3. S109 drivers (Happy to change)
4. Teensy 4.0 (600Mhz) - fasters better? (Happy to change)
5. Some sort of wifi card. (Whatever Works)

I'm happy to design and make my own custom Circuit board and power supply.

What I want to use it for:

Lucky Imaging with high resolution tracking, happy for slow slew
speeds if it gets me more accuracy.
If I can also be greedy and have fast slew times of 5 degrees per
second that would be cool too, but not necessary.

How I want to use it:

Link Iphone via wifi with the tracking app to update time/location.
Open Sky safari for goto commands

What I'd like the possibility of upgrading:

Adding rotator for the camera
Adding Blutooth for that joytick control
Adding GPS for auto Location/time updating.
Adding humidity/temp sensor to calculate dewpoint and switching
heaters on/off (just the switching command is fine i'll work out the
power side)


Apologies in advance if any of the above is completely stupid and
won't work for obvious reasons.

Thanks.



















Re: OLED 1.3inch resolution issue fix

Dave Schwartz
 

You have the incorrect driver model in the Config.h file. That's basically the difference between the SH1106 and the SSD1306... the column addressing.


On August 2, 2021 7:53:24 p.m. EDT, Kokoro San <alexchong79@...> wrote:
Hello guys hope you all have a great day.

My OLED 1.3inch resolution seem out of range.
Anyone know how to fix this ?
Using SHC v1.03 version board with ESP32 and Bluepill board v1.8 with firmware 4.24.
--
Sent from my Android device with K-9 Mail. Please excuse my brevity.


OLED 1.3inch resolution issue fix

 

Hello guys hope you all have a great day.

My OLED 1.3inch resolution seem out of range.
Anyone know how to fix this ?
Using SHC v1.03 version board with ESP32 and Bluepill board v1.8 with firmware 4.24.


Re: wifi page unavailable #wifi

Khalid Baheyeldin
 

The recommended WiFi firmware is now called SWS (Smart Web Server).

Read the above page, then download it from here, and flash it to the Wemos.

Works the same way as the older WiFi module.


wifi page unavailable #wifi

exebece@...
 

hi
it seems that wifi WiFi page is down...
R


I get this Error

Prasad
 

A couple of nights ago, (on Friday night) I was out on my deck running my OnStep driven Vixen GP mount for a few hours and I got this "Unknown" error. This was not the first such occurrence. It has happened before and usually when I leave my mount and my Android phone unattended for a while (like 30 minutes). When I am back after the break I slew the mount to a new object. When the mount stops after the slewing is done, I use the navigation buttons on my Android phone to center the object. This is where it goes wrong. When I press the Dec axis -  N or S buttons the Dec drive motor begins to run but it does not stop when I lift my finger. The motor continues to run and I have to pull the power cord to prevent a crash. My phone showed this error. I have not experienced this behavior for the RA axis.  

 Inline image

Of course, I restart, and then I am back in business. This error does not happen often but when it happens it is an irritation. 

Another point. I do only visual observation and therefore I do not do any serious polar alignment. I do not mind any minor drifting of the object. I do have to center the object after each slewing operation. 

Here are some details of my setup. 
OnStep MiniPCB V1
Running software release 2.22 (I am happy with this. This is my trusted OnStep controller). 
Android phone runs Android V11

I have a second OnStep controller built on Mini-PCBV2 and running release 3.16. It has not given me this problem.  

Any suggestions? 

Thanks
Prasad

 


Re: CGE conversion

George Cushing
 

According to the RAMPS14 pinmap

// For focuser1 stepper driver on RAMPS E0
#define Axis4_EN             24     // Enable
...
#define Axis4_STEP           26     // Step
#define Axis4_DIR            28     // Dir

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