Andrew replied to the topic 'Astroberry Focuser with Adafruit Motor HAT' in the forum. 5 days ago
Andrew replied to the topic 'Astroberry Focuser with Adafruit Motor HAT' in the forum. 5 days ago

Oh no. That's not good.

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Andrew replied to the topic 'Astroberry Focuser with Adafruit Motor HAT' in the forum. 7 days ago

Excellent! I'm looking forward to giving this a spin.

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Andrew replied to the topic 'Astroberry Focuser with Adafruit Motor HAT' in the forum. 7 days ago

Kaczorek: Will there be an option for backlash steps?

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Andrew replied to the topic 'Astroberry Focuser with Adafruit Motor HAT' in the forum. 1 week ago

Hi Kaczorek! Excellent work on the Astroberry Server. I know that's been keeping you very busy so take your time on this, no big rush. I have just about worked out the final iteration and will be releasing the STL files for anybody who can make use of them. Thanks Again.

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Andrew replied to the topic 'Astroberry Focuser with Adafruit Motor HAT' in the forum. 2 weeks ago

Thanks Rob. As you said it should, and indeed from my experience with one does work with the Pi3. The HAT also requires it's own power supply as it can not draw enough from the GPIO pins. There is also space on the HAT for extra custom circuitry to match the voltage requirements of the motors being used or what have you.

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Andrew replied to the topic 'Astroberry Focuser with Adafruit Motor HAT' in the forum. 3 weeks ago

I haven't got a clue how many steps I'll need with my gear ratios. I hope 20,000 is enough. When I get home I'll try to calculate it

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Andrew replied to the topic 'Astroberry Focuser with Adafruit Motor HAT' in the forum. 3 weeks ago

I don't have any feedback. I've set it up so that I can manually get close to focus, then engage it for automation

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Andrew replied to the topic 'Astroberry Focuser with Adafruit Motor HAT' in the forum. 3 weeks ago

RobJones wrote: Looks good - I want one!
Are you prepared to share the STL file for the motor box? And do you have a parts list, I'm going to give this a go!
Also; interested to know what the gearing you have gone for on your NEMA stepper motor gear box? 5:1 or c50:1 ?


I have a few more iterative improvements I want to make before sharing the STLs which I am happy to do. The design is custom made specifically for the old style Skywatcher rack & pinion focuser. As for parts list. I will put one together when I get the chance. The motor I chose was a NEMA 14 with 51:1 gear reduction.
If I were to start over from scratch I would have probably chosen a NEMA 11 with roughly half that reduction. It's a lot of motor, slow and lots of torque. A bit overkill. I also had to add an LM7805 linear power regulator circuit onto the free pads built onto the motor hat to convert 12V to 5V to drive the motor properly and make holes through the case of my Raspberry Pi for new port and power terminal for the HAT.

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Andrew replied to the topic 'Astroberry Server' in the forum. 3 weeks ago

Bizarre. Your reply to my thread on the Adafruit Motor HAT thread is appearing in the Astroberry Server thread.
I Will post my reply in the correct place here .

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Andrew replied to the topic 'Astroberry Focuser with Adafruit Motor HAT' in the forum. 3 weeks ago

I tried to attach these before. But I think the files were too large.

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Andrew replied to the topic 'Astroberry Focuser with Adafruit Motor HAT' in the forum. 3 weeks ago

Hello Kaczorek. Great news here. I have finished assembling my 3D printed, stepper driven focuser and have driven it successfully with the example scripts Adafruit provides.

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Andrew replied to the topic 'Astroberry Server' in the forum. 4 weeks ago

This looks incredible!

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Andrew replied to the topic 'Still stuck with my ZWO 120MM' in the forum. 1 month ago

I am successfully guiding with ZWO ASI 120MM with a Raspberry Pi3, but it wasn't a smooth process at first. Updating the SDK at some point to 6.0110 helped ZWO SDK found here . But I believe Knro updated it for in the main build already.
Looking at your logs I see unsupported 16bit raw errors, try verifying it is set to 8 bit. Might help. USB compatibility with this cam is not great on Linux, so the extra bandwidth required there could be an issue.

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Andrew replied to the topic 'dslr - image info' in the forum. 1 month ago

Does this mean we should manually set it to 5184x3456 and throw away the first image?

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Andrew replied to the topic 'Astroberry Focuser with Adafruit Motor HAT' in the forum. 1 month ago

That's understandable. Indeed the website doesn't explicitly state the Raspberry Pi 3. But I suspect that is probably out of date information. I had to do a little searching to find information that suggests it is indeed compatible. As seen here. I am currently 3D printing parts as I am writing this. So I should be ready to go soon. Thanks again for time.

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Andrew replied to the topic 'Astroberry Focuser with Adafruit Motor HAT' in the forum. 1 month ago

I am currently getting parts together in advance. I have the motor, and the Adafruit board. Plus I modeled everything and am ready to 3D print the rest. Once I get those all done I can theoretically begin to test anything you have written.

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Andrew replied to the topic 'dslr - image info' in the forum. 1 month ago

I also went back to strictly taking cr2. Which is a bit of a hassle right now as sequence maker defaults to FITS. As for Canon 600d, the sensor specs are 5184x3456, as are the raw files it saves. But the FITS files come out 5202x3465, otherwise they are clear images.

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Andrew replied to the topic 'EQMod tty read and write error' in the forum. 1 month ago

Hmm perhaps I misunderstood what you meant by

"using a pluszmis BT adapter on RPI3"

If that means as a secondary adapter to the one built into the Pi3, it's a completely different issue. My earlier comment was for connecting to an adapter from the Pi, where the adapter is connected to the mount as an EQMOD direct bluetooth interface.

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