I had my system setup as an DS-127. I have since set it up as an ETX-70 and a quick test seems to have solved th problem. I will give it a comprehensive test...
Cool! I think you might want to consider making yourself a larger set of worm gears... "My advice is always free and worth every penny!" -Christopher Erickson ...
Phill, I'm so impressed! That is truly beautiful engineering! Can I ask where you source your ring gears? Short of spending hundreds on Byers gears on eBay...
Chris, Just wanted to confirm my thinking. Larger ring gears will improve accuracy of GOTOs and minimize backlash issues. Will they also reduce strain on the...
Hi Jim, I can answer that - yes. The larger the diameter, the less torque needed by the motor driving the worm, given the same load (ISTR it's directly...
Jim, I made the worm gears my self, the worms are mild steel, the worm wheels are acetal and the housings are aluminium bar. I made new bushings for the...
I've done a retrofit of DS motors and a WarpsDrive kit to a CG-5. The belt drive is terrific at cutting dow/out backlash and gives a terrific positive feel to...
There is a document in the Files section of this group's home page titled "gear ratio gospel" and it should help you to figure out the ratio you need. "My...
Assuming I have an encoder output that's quadrature in nature, if I cut every other tooth out of an encoder wheel will I effectively half the ticks/revolution?...
Every change of both phases counts as 1 tick (light passes through to light being blocked and the other way around). Normally the pulsewidth is around 50%, by...
I have a problem visualizing an encoder with low enough resolution that would allow that, removing a 'tooth", and have sufficient resolution for a telescope....
Since we're in a (mostly) Autostar-centric group, let's look at how the Autostar does it. The encoder is on the motor shaft, so the physical gear ratio between...
The place where a great unknown is introduced is the effect of non-50% duty cycle on the Meade Motor Control cards, and their "servo-loop" action. It's the...
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...
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...
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...
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...
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...
... 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" (?)) ...
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...
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...
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...
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...
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:...
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...
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 )...
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...
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