RoboScope at Yahoo! Groups

Re: rapsacw - DIY Motor controller autostarstepper.c

Freddy Diaz — Sat, 07 Nov 2009 14:30:25 GMT

Yes those are pull-up resistors, unless you connect them to a non 3 state device (to a TTL gate output) you should connect them to vcc. I remember that even

Re: rapsacw - DIY Motor controller autostarstepper.c

pinyachta — Sat, 07 Nov 2009 14:06:47 GMT

I've been working on a "clone" of Al Peters' design to use the Autostar will higher power motors. Looking at his DS circuit mods ( http://tinyurl.com/yj9zjf3 )

Re: rapsacw - DIY Motor controller autostarstepper.c

cas — Fri, 06 Nov 2009 22:16:40 GMT

I've updated the source, sadly i can't test it anymore, i've stripped the autostar connection from my board and connected it to my EQ3 mount for tracking

Re: rapsacw - DIY Motor controller autostarstepper.c

cas — Fri, 06 Nov 2009 19:31:48 GMT

No, I haven't. I only have the old version here. Cas ... From: lynol1000 To: RoboScope@yahoogroups.com Sent: Friday, November 06, 2009 6:54 PM Subject:

Re: rapsacw - DIY Motor controller autostarstepper.c

lynol1000 — Fri, 06 Nov 2009 17:54:39 GMT

Cas, Ok! Have you ever had the chance to try one of the new 497EP's against this code? There are a few new surprises in the Calibrate section that Andrew is

Re: rapsacw - DIY Motor controller autostarstepper.c

cas — Fri, 06 Nov 2009 16:13:40 GMT

Only 25 bits are transmitted, so the last 7 are don't care. ps: there is an error somewhere in the code with the communication with the autostar, the data line

rapsacw - DIY Motor controller autostarstepper.c

lynol1000 — Fri, 06 Nov 2009 14:15:11 GMT

CAS, Cool work here! http://tech.groups.yahoo.com/group/RoboScope/message/11380 A question about one section of the code: ... comm_recv = ticks<<16; // data is

Re: Encoder question

pinyachta — Fri, 30 Oct 2009 00:41:43 GMT

http://www.campocatinobservatory.org/galleria.asp?Gruppo=C.A.O.&Titolo=C.A.O. ... http://tinyurl.com/yh3ak2f Thanks! ... If we have to. There's no room in the

Re: Encoder question

autostaretx — Thu, 29 Oct 2009 20:24:33 GMT

... Try -this- link: http://www.campocatinobservatory.org/galleria.asp?Gruppo=C.A.O.&Titolo=C.A.O. (replacing the central "space" with a "question mark" (?))

Re: Encoder question

autostaretx — Thu, 29 Oct 2009 20:18:51 GMT

... ... and cheap and Autostar-controlled.... Will you settle for two out of four? ... That URL does not lead to a working page. It expands to:

Re: Encoder question

pinyachta — Thu, 29 Oct 2009 19:22:27 GMT

Thanks all. Thanks all. What I am trying to do is suss out the trade offs in tossing around a 150 pound OTA. I want accuracy and as high speed goto slews as

RF link good for 230kbaud full duplex?

lynol1000 — Thu, 29 Oct 2009 10:39:48 GMT

Hello all, Does anyone know of an rf adapter that will accept digital serial input stream for at least 230kbps payload and do 100% duty cycle transmission time

Re: Encoder question

autostaretx — Thu, 29 Oct 2009 03:13:03 GMT

The one reason to contemplate chopping teeth from the encoder would be if you were using a -faster- motor. Meade's motor cards are limited to about a 20 KHz

Re: Encoder question

njsgps — Wed, 28 Oct 2009 20:16:35 GMT

I certainly cannot think of ANY reason, ever, to reduce the 'physical' number of slots on an encoder wheel. It just doesn't make sense to me, certainly not

Re: Encoder question

jim — Wed, 28 Oct 2009 19:39:24 GMT

I see. Thanks for the explanation. Not having one, mead controller, I was some what mystified on how they got the resolution required. A 9000 to one ratio