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very nice work!
I like the solution for the gear housing, cheap, light and easily
I am planing to make a fixed station also and your work gives me
some ideas about on how to realize the concrete pier.
Le 08/04/2018 à 22:21, Gintautas
Drazdauskas a écrit :
I am Gintautas from Lithuania.
At first I want to say a lot of thanks and to pay obeisance to
the Howard, Khalid and everyone who collaborate creating and
developing the Onstep project. It is fantastic.
I have followed Howard's "stellarjourney" more than a year. Had
tested a while Onstep on Mega2560 with Bluetooth but
had hesitate to start building controller because did not have a
mount. Now I use a dobson mount on the equatorial platform.
But almost a year ago I was lucky enough to buy a pair of 190 mm
diameter 359 teeth worm wheels with worms for a very, very good
price. So I had no another choice than to build a mount.
So I have had to get more deeply acquainted with mechanics (I am
electronic engineer) and have obtained a lot of new skils and
knowledge. I have created a drawings and ordered the parts in a
And, of course, I needed a controller. So have built the Onstep
And finally, yesterday evening, was the first field test of the
mount and controller. Of course it was just a first test and
there are a couple of things to improve or finish. But I am
happy it works, motors are capable to drive a load (track and
slew). For the test I have used the Alpha branch.
Basic elements are:
OTA is Skywatcher 254/1200
Onstep built on MaxPCB v 1.11,
ESP8266 ( it is Chinese Ebay stuff, so there is some problems
uploading firmware through Teensy, so I use upload via
Drivers for RA/DEC Chinese Ebay TMC2130 (had to modify the
boards as per Pedro post https://groups.io/g/onstep/message/1877)
Drivers for the Focusers - DRV8825 (have used them at the first
tests for RA and DEC on the table).
Motors for RA/DEC are 17HM15-0904S.
Motor PSU - 24V
Gear ratio motor pulley to worm pulley 1,72413793103448 (15 to
26 teeth T2.5 ), worm wheel 359 teeth.
For now I use "'Stellarium" and "Stellarium scope" for
The Onstep has started to work from the first software upload
and power up.
If there was any problem - it was related to the my mistakes in
configuration only (at least till now).
It works using PC and Android either as well as ASCOM drivers.
I hope I will enjoy after I will finish it.