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About clertem

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    Toowoomba, QLD, Australia

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  1. Hi m000c400, Great work ! I am working on a similar project as yours and would be interested to know what type of NEMA 17 ones you chose (these are sold in a variety of torque / steps) ? I can see on your photo above that the RA stepper is directly connected to the mount shaft, and I am surprised that the idle torque of the motor is enough to immobilize the mount. Is it the same for the other axis (we can't see the other side). I have tried with a couple of CNC pulleys and belt for the DECL axis but unfortunately the weight of the scope+camera was too high and the belt was skipping on the pulleys all the time... Another thing I am interested in is how you actually fixed the motors to the mount. I've been working a lot on possible design for this and came up with little successful results... The one I have for the moment is kind of supported by the counterweight shaft using a circular bracket. Originally the motors I got (from the bin of our engineering building at Uni) were too fast and I had to go with a worm/gear combo of about 40:1 ratio. Tests were OK on the RA axis, but the way I've got it mounted is not great and the motor vibrates, thus worm moving slowly out of its gear. I am surprised that you have achieved a working RA tracking simply on a direct connection like this ! I just have to solve that mechanical part, because for the rest, it's pretty allright. I'm driving them by an arduino (with dual stepper driver shield). I've posted where I am so far here : I've also created a 3D model of the SkyWatcher EQ3 Mount piece http://www.123dapp.com/project/Skywatcher%20EQ3%20Mount/3366365 Thanks for helping, Regards Mathieu
  2. clertem

    Skywatcher EQ3 DIY Tracking

    Home made tracking system from scratch on a SkyWatcher EQ3 mount, with Arduino and custom code
  3. Guys ive got the same problem as you, have you fixed it ? How ?
  4. jsanse, some of the links posted above do not work, even when logged in, would you mind refreshing them please ? Regards Mathieu
  5. I might not require a T-adapter but just a T-ring for the skywatcher...
  6. Same question with identical camera but SkyWatcher reflector 150mm f/5 on EQ3 mount ? I've seen some shops selling Canon T-rings for 'Vixen' or 'Celestron' but are these compatible with Skywatchers ? Thanks 4 helping , Rgds Mathieu
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