Since I aquired an Losmandy G11 mount without any goto provision I decided to create my own solution. I was a bit reluctant to use a Gemini, mainly because of the cost, but also due to the reliability since the servo motors are somewhat prone to failure. I also like to have complete control over the software/firmware so that no "show stopper" issues will ever be a problem for me. Looking around the 'net I saw other goto systems that seemed capable, but either they had needlessly complex hardware or were commercial systems that cost about twice what they should.
OnStep is a computerized goto system, usually for stepper motor equipped mounts though any step/dir interface motor driver (including servo) should work. It was designed, from the beginning, as a more or less general purpose system and provisions were made in the firmware to allow for use on a variety of mounts including Equatorial and Alt/Az (GEM, Fork, Dobsonian, etc.) It uses an LX200 like computer command set with a few extensions to suit hand controller-less operation.
There's a telescope hand controller App for Android (free in the Google Play Store,) an option to control through a website (Smart Web Server,) and a dedicated physical hand controller (Smart Hand Controller.) Or, on a PC there's ASCOM and INDI drivers for control. These options allow you to setup and control OnStep using a wide range of software including my Sky Planetarium, Cartes du Ciel, Stellarium, SkySafari, KStars, PHD2, etc. You can see most of the control possibilities in the diagram below:
Also, please visit my StellarJourney.comsite for updates, links toOnStep resources, my other astronomy software, or to see someImages taken with the assistance of my OnStep operated mounts.
If you find OnStep useful and would like to show your appreciation and support please consider making asmall monetary donation. This keeps me motivated and helps cover expenses associated with my projects.
Re: CS32F103C8T6... A new clone?
Quote
Hard not to be confused about the 64/128 issue...particularly since it seems that even real STM chips read (depending on the tool) as 64K even though they have
Re: CS32F103C8T6... A new clone?
Quote
Hard not to be confused about the 64/128 issue...particularly since it seems that even real STM chips read (depending on the tool) as 64K even though they have
Don't rely on the ST-Link dongle. I have one, and it reports 64K on the
regular Blue Pill, which reports 128K in the Arduino IDE, and works
fine with OnStep.
Try the ST Flash Loader
Don't rely on the ST-Link dongle. I have one, and it reports 64K on the
regular Blue Pill, which reports 128K in the Arduino IDE, and works
fine with OnStep.
Try the ST Flash Loader
I am fine tuning my cge. It seems to track a tiny bit slow. I am tracking the sun with really good polar alignment and the sun is moving a tiny bit faster than the mount. I have tried adjusting the
I am fine tuning my cge. It seems to track a tiny bit slow. I am tracking the sun with really good polar alignment and the sun is moving a tiny bit faster than the mount. I have tried adjusting the
It is very hard to know whether the chip you will get will be made by ST, or CS.
The images on eBay are usually accurate, but often not. The shop on eBay is
at the whim of his warehouse, which in
It is very hard to know whether the chip you will get will be made by ST, or CS.
The images on eBay are usually accurate, but often not. The shop on eBay is
at the whim of his warehouse, which in
So saying roughly "40% current works best" regarding slews seems fairly firm in my tests of a variety of stepper motors/drivers.
For tracking though it's a toss up, in some cases higher currents
So saying roughly "40% current works best" regarding slews seems fairly firm in my tests of a variety of stepper motors/drivers.
For tracking though it's a toss up, in some cases higher currents
Thank you for your answer.
I bought it by following the link indicated in the wiki.
I'm afraid to find more and more "case with the Chinese clone chip".
I'll try another seller.
Romain
Thank you for your answer.
I bought it by following the link indicated in the wiki.
I'm afraid to find more and more "case with the Chinese clone chip".
I'll try another seller.
Romain
You may want to check the web for discussions regarding "64K" stms. For example:
https://stm32duinoforum.com/forum/viewtopic_f_28_t_3987.html
I personally am skeptical that there are clone chips per
You may want to check the web for discussions regarding "64K" stms. For example:
https://stm32duinoforum.com/forum/viewtopic_f_28_t_3987.html
I personally am skeptical that there are clone chips per
I don't know if these are counterfeit or licensed clones.
If the Flash memory is 64K it will not work at all with OnStep.
The minimum OnStep needs is 128K.
So far, all the Blue Pill that have an
I don't know if these are counterfeit or licensed clones.
If the Flash memory is 64K it will not work at all with OnStep.
The minimum OnStep needs is 128K.
So far, all the Blue Pill that have an
Same thoughts here about that.
But not sure though, for example testing of a 5-phase motor with pretty darn nice micro-stepping accuracy again reached higher RPM's by lowering the current well below
Same thoughts here about that.
But not sure though, for example testing of a 5-phase motor with pretty darn nice micro-stepping accuracy again reached higher RPM's by lowering the current well below
The finding that 40% current works best is very interesting and something I have not heard discussed before. I wonder if it due to the non-linearity of the magnetics in the stepper...that going up
The finding that 40% current works best is very interesting and something I have not heard discussed before. I wonder if it due to the non-linearity of the magnetics in the stepper...that going up
This setting shouldn't matter with regard to motors stalling/missing steps during slews. TMC2130's interpolate to 256x in all micro-step modes so you don't run into problems with higher resonance due
This setting shouldn't matter with regard to motors stalling/missing steps during slews. TMC2130's interpolate to 256x in all micro-step modes so you don't run into problems with higher resonance due
With similar stepper motors I found the best setting was about 40% power = 500mA for those motors.
Higher and my slews exhibited more noise/mid-band resonance and lost torque... I don't have those
With similar stepper motors I found the best setting was about 40% power = 500mA for those motors.
Higher and my slews exhibited more noise/mid-band resonance and lost torque... I don't have those
The TMC2130 can't handle a Vref of much above 1V with the stock heat sinks alone. With a fan on the stock heat-sinks, depending on how effective, perhaps 1.2V? With a MaxPCB2 using the aluminum case
The TMC2130 can't handle a Vref of much above 1V with the stock heat sinks alone. With a fan on the stock heat-sinks, depending on how effective, perhaps 1.2V? With a MaxPCB2 using the aluminum case
Hello!
I started on a similar configuration (I wait for the elements to arrive):
-MKS Gen-L v2.0 + TMC2130 SGL v1.0 (SPI mode)
-NEMA 17 0.9° 0.9A 17HM15-0904S Stepper different from yours (0.9A vs
Hello!
I started on a similar configuration (I wait for the elements to arrive):
-MKS Gen-L v2.0 + TMC2130 SGL v1.0 (SPI mode)
-NEMA 17 0.9° 0.9A 17HM15-0904S Stepper different from yours (0.9A vs
Hello,
I have built an Onstep controler based on a blue pill hardware witch currently works fine.
I have recently bought other STM32 blue pill using the link given in the project desciption
Hello,
I have built an Onstep controler based on a blue pill hardware witch currently works fine.
I have recently bought other STM32 blue pill using the link given in the project desciption
Well, I disagree. I was missing a reading light in my SHC and RTC in Teensy based mini PCB. So I modified the hardware and software. I offered the software changes to Howard. He decided they were
Well, I disagree. I was missing a reading light in my SHC and RTC in Teensy based mini PCB. So I modified the hardware and software. I offered the software changes to Howard. He decided they were
