telescope stepper driver?

[Maciel (Maciel)]

There is a new version (currently 5.1.0.234), fixing a serious bug that produces audio clicks and pops during and after high speed moves. It affects all users, but worst who is using analog drives.
Look for latest version at http://soundstepper.sourceforge.net/
Maciel

[bojan]

Hi Maciel,
Thank you for letting us know - I will update my copy right now.
I didn't notice this bug yet (probably because I am not using your software much recently - no time for anything else but work unfortunately..)

[garymck (Gary)]

Hi,

have just found the correct USB to audio adapter for this project here:

http://www.ebay.com.au/itm/5-1CH-USB...item19d2f9dbb4

$3.95 each delivered. Took 2 days to arrive. Have just ordered more. They are the genuine SJ588 that Maciel recommends.

hope it helps...

Gary

[Maciel (Maciel)]

Hi Gary, good news! What is the audio device name on Windows? "USB AUDIO"? The L/R outputs and common are all at 2.5V in silence? If yes and yes, it's a genuine TP-6911 based device, the best for analog drives.

But for pulse/direction drives, the most of fake device works well, using schmidt triggers.

Using pulse/direction drives, the fake devices are even better than true TP-6911, because it is a PWM device, then the outputs must be low-pass-filtered (twice!) before schmidt triggers, while fake devices have "B-class" analog outputs, and must not be filtered.

Originally Posted by garymck

Hi,

have just found the correct USB to audio adapter for this project here:

http://www.ebay.com.au/itm/5-1CH-USB...item19d2f9dbb4

$3.95 each delivered. Took 2 days to arrive. Have just ordered more. They are the genuine SJ588 that Maciel recommends.

hope it helps...

Gary

[garymck (Gary)]

Hi Maciel,

they report as USB audio. Have had bthem open and they look just like your pictures. The only difference is they have one led not two - though there is space on the circuit board for the second one. I've got 2 of them with another 8 on order (4 for me and four for a friend..)
cheers
Gary

[Maciel (Maciel)]

Hi all,

I created the Soundstepper users group, for better support users:
http://tech.groups.yahoo.com/group/soundstepper/

[Maciel (Maciel)]

Hi all,

The SoundStepper documentation was updated, with 2 new pages about the
hardware:
- How to choose, buy, test and recognize the USB audio devices;
- Suggestion of filter to couple USB audio devices with pulse/direction drives.

These are the 2 first links on the "hardware" section of main page:
http://soundstepper.sourceforge.net/index.html#hardware

P.S: English readers, please alert me for possible language mistakes.

Maciel

[bojan]

Originally Posted by bojan

...
When I am finished with details, I will post the schematic here.

I am not sure when I will have time to finalise the 3771 driver interface - it seems I will be very busy at work in next couple of months.

As promised:
Schematic and PCB...

[TimberLand (Justin)]

I'm currently running my 16 horse shoe with Mel Bartel's dos based system running on an embedded PC which runs great. Remote controlling that from inside the house is tricky but doable. Rather working on a solution to this I have been looking for a system to drive the steppers and hopefully the dome.

Presto here it is, great work with Sound Stepper, I have purchased the USB audio devices and waiting to test them on similar steppers. One thing that I would like is the ability to run two copies on the same computer or have an option to run the de-rotator as the dome control. Either would be fantastic.

Couple of months before I get a chance to install it on the scope, but I really like what I see so far, top idea.

Justin