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I am not familiar with the mount's specifications. Please ask on the OnStep group if someone is using it.

Pour quoi mon ami?

Hello Khalid, maybe I didn't specify that I desoldered the chip from the board and soldered the STM32F303CCT6.

I don't have much to say here. A RobotDyn F303CC should work for both axes, at least with the original OnStep 4.x. In fact, the original Blue Pill should also work well with that version. The limitation is that slewing speed may be limited. Try to ask in the OnStep group, see if someone has more info to add.

If you only have one gear reduction, you can put GR2 as 1. But it is best if you ask on the Onstep group and see what others who have a harmonic drive say.

The issues you mention are hypothetical and moot. The Canon DSLR I used has 5X and 10X magnification, and that provides the necessary power to see the doughnut shape clearly.

@@khalid_ba well I appreciate the video. I am about to buy another sct after years of not owning one and will try this method again and report how it corresponds to an actual star test outdoors.

FYSETC S6 is the board for 3D printers that can be used as a controller for a goto telescope mount with OnStep.

Camera lenses don't usually have screws or knobs that are designed for the use of the photographer. Also, an artificial star may not be enough for a lens that does not have a secondary mirror. Search Google for "collimating camera lens" and see what you find.

As far as you can. For example, if you are in an apartment, try to place the flashlight in one end, and the scooe in the other. In my case, it was about 7 or 8 meters.

You need to read the OnStep documentation on the Wiki

Only specific boards are supported. The ones on the onstep site.

The Wemos R32 has too many special cases and limitations. If you use it for a basic system (only two motors), it may be sufficient, but you have to follow the instructions very carefully. For questions on the R32, please ask in the OnStep group because I don't use it.

Hi Khalid, Thank you for your suggestions. I will try to work your model and reach out to you for any clarification.

Read this article baheyeldin.com/astronomy/vixen-sxd-mount-converted-stm32-onstep.html

@@khalid_ba Thanks!

No kits for Vixen that I know of.

@@khalid_ba Thanks I'm not really clued up on the onstep system but would like the get the Vixen mount working & more up to date if that makes sense, as in its standard form the starbook system it has isn't the best & for astro photography they weren't great performers from what I've read.

@@dumpydalekobservatory Converting any mount to OnStep usually requires that you replace the motors (unless they are stepper motors). The CG5/EQ5 mounts have kits, but the Vixen does not. You have to buy the motors, pulleys, and belts separately, drill holes in the mount flange, ...etc. That is the way things are ...

There used to be a box design on the OnStep group under the Files section.

For possible answers, check the the Wiki on the OnStep group

OnStep works only on a supported controller, so a Meade handcontroller will NEVER work with OnStep. I am not selling any kits. You can try this site to see if they have stock www.stmbluepillkits.com/p/order-kit.html

Please read the instructions carefully. They address all your questions.

@@khalid_ba OK THANKS

Both the MKS Gen-L and the Arduino Mega 2560 are very old and don't have enough power. Go to the OnStep group for the alternative hardware, and instructions for everything.

@@khalid_ba thanks! 👍

@@khalid_ba can you suggest a better microprocessor...drivers....for better results? I read some posts but they all use much complicated board and mks seems so clean and simply to use...

@@massimoborghini9724 There is no simple answer, since there are lots of criteria on what is 'best', what is most suited for the features needed, what is available in your country, and so on ... The OnStep Wiki has a lot of info on what is available Check the first few links on this page onstep.groups.io/g/main/wiki/3861

@@khalid_ba i find very useful info , calculators and solutions but no way for a simple step by step tutorial. I just want to try to build a GoTo system by a board, drivers,stepper motors nema 17 (3d printers) for my self made litle dobson. I have a mks gen L 1 drv8825 and a bag of motors availables in my cave.... I saw your video and i find it interesting to start building . Tell me Mks is mega 2560 with ramp, isn't it?......so i should load arduino IDE to manage Onstep sw set up, right? Thanks for your answers

There was a Chinese translation that someone contributed, so a Spanish one can be made if someone creates the necessary files.

The links in the description have links to where you can download the firmware. Not sure what "bridge with a cable" means ...

Yes

That is only one part of the functionality. There are lots more features that OnStep has. Not all features are used by all users (e.g focusers, autoguiding, WiFi, Serial port, and so on). If you want a simple solution that only tracks the sky without having goto functionality (or the other advanced features), there are other projects that can do that. For example Sky Track, ...etc.

I don't have a quick answer. You can ask in the OnStep group.

I don't think a laser would work, since the beam would not be thin enough. Green pointer laser, and red cat lasers both have thick beams. Also, I don't know if they would harm the camera sensor, let alone your eyes. Better stick to normal light, and a pinhole of some sort.

@@khalid_ba Thank for your quick reply. I am not new to amateur astronomy and I have worked very hard a number of times on "perfect" collimation and it is a pain trying this in the (cold) New Mexico desert on a real star, as I am sure you know, always having the star move out of the field of view when tweaking the collimation screws. I can't say I get bad pictures but detail and focus of something like Jupiter just isn't good enough. I have had this telescope for probably 10 years and used it many times and am generally satisfied with moon images but the planets just aren't good enough - I am going to try "one more time..." and hopefully get the results I want. I am seriously considering buying a nice refractor telescope. Hopefully, I won't need to. Thanks again.

@@ElPasoTubeAmps I am not a planetary imaging expert, but friends who do it have to use video and lucky imaging to get good images. Otherwise seeing is a constant problem.

No idea if overclocking is safe or not. Instead of that, you can try MICROSTEPS_GOTO 2 levels from the one you use for tracking (e.g. if you are tracking at 1/16 or 1/32, then try 1/4 or 1/8 for MICROSTEPS_GOTO. That should speed up your slewing speed. For the RJ45, just combine each two adjacent wires by soldering them to one wire on each side of the connection (motor and controller)

Don't know if that module from Amazon would work. Compare the pin labels on it to the Blue Pill. If ALL OF THEM match, you can try it. If there is a difference, don't bother.

@@khalid_ba Thanks for the amazingly quick response. Regarding the RJ45, I know about the adjacent pairs being wired together, but when connecting to the stepper, which pair goes to A+, A-, B+, B- on the stepper wiring?

@@khalid_ba Got it, thanks!

@@MikeHammer1 There are several ways of doing this. Some people go the trial and error route (since you can't harm the motor by wrong wiring, it will just be noisy and would stall). You can try Dupont female/female wires from the controller to the motor until you get the wires right, then solder accordingly. Others just wire first pair to the first motor wire, the second pair to second motor power, ...etc. and then if the motor is going the wrong direction, they would use the REVERSE parameter in the firmware to make it go the right way. Take your pick ...

If you use an ST4 cable, you don't need a battery since the cable will provide power to the SHC.

Please ask in the OnStep group, because I don't use the CNC board myself.

I don't use the STM32CubeProgrammer. Instead I am using dfu-util on Linux. Please read carefully the OnStep group Wiki. Only a few specific microcontrollers are supported, and using anything else will not work. If all else fails, please ask your questions on the OnStep group.

@@khalid_ba I use stm max series 3.6 with stm32 f411ce board. The board is on for onstep. And the stm Stmcube programmer is in serial with arduino ide. The flash is done trough arduino ide . I think I found. In the firmware 4.24 is it stated that the usb shares same serial with GPS. And the serial 2 that answers to the command is not the same with usb one . I think I need to buy a usb serial adapter in order to be able to send commands in serial monitor in ide and have a response like on step. In the wiki all this tiny settings steps are not detailed have to figure it out alone.

@@christm45 I never used the STM Max, so you have to ask either Howard or others who use that board on the OnStep group.

Please read the entire document that is linked in the description of the video

@@khalid_ba thankyou sir..

@@khalid_ba i have built the board sir and understood tat part.. but confused with the flashing of the software on to the stm32.... need some help with it..

@@suveerudayashankara4273 please visit the first link in the description of the video. Details are all there.

@@khalid_ba sir i understood the flashing part but getting some errors while verifying the program.. it is showing :(no such file or directory found) i even updated my ide as well but it is not working.

Sorry. I don't have time to explain the details. Please ask your question in the OnStep group.

Sorry. I don't have time to explain the details. Please ask your question in the OnStep group.

No, this board is not supported. Only the boards on the groups.io Wiki for OnStep are supported.

@@khalid_ba dude thanks for the reply, yes iv been trawling that wiki for days and I can't make sense of it, I tried buying the blue pill kit but says its out of stock, refer to previous page, but there's no details on it, so I then sent a message to the group and had nothing back, I'm so desperate to just put a simple tracking mount together for my eq5, but I don't know what's best and seems like the kits are unavailable....

@@mickyovts3872 The pandemic chip shortage has hit the Blue Pill. Both the microcontrollers that can be used with the Blue Pill PCB (the original cheap one STM32F103 128K, and the faster and more capable one F303CC) are no where to be found.

@@khalid_ba iv just realised who you are lol..wow dude you're awesome man....so I'm sorry but could you tell me if the arduino mega 2560 would still work ?? And what would I need to have a simple tracking mount...the group says the mega, a hc-05 I feel something is missing ? And there's no more info I can find on the arduino version....On top of the bread board shows a little red chip, looks like a stepper driver ?? I get its not practical but it also says "unless low cost is a priority" I'd say in this case it is, especially with the shortage lol...BTW thankyou for the replys, I expect your probably busy working away at something, so your time is appreciate

@@mickyovts3872 The Arduino Mega2560 will work, with the RAMPS 1.4 shield, but it is the slowest board that can run OnStep. The next version (few to several months) may not support it. It also suffers from an inaccurate ceramic resonator. This is not an issue if you want visual only (not suitable for astrophotography probably). The HC-05 is a Bluetooth dongle that makes an OnStep board talk to a phone, but a Wemos D1 Mini over WiFi provides for more functionality than BT.

WiFi, and also through an ST4 cable to the OnStep controller. No Bluetooth.

@@khalid_ba Ok, thank you for your job!

I don't use encoders, so have no first hand experience here. But several people did add that successfully. It adds complexity (extra wires, ...etc.)

Eh?

The accent is much better than the french canadian accent...