ATM Nut.6" F15 Jaegers Refractor on Homebuilt EQ mount12.5" Homebuilt NewtProjects:16" F7.2 Reflector
I lost count of my scopes. Now I just want mobility. I came, I saw, I bought some interesting accessories, and put names to faces: NEAF 2012, ASAE 2012, SWAP 2013, ASAE 2013.
Quote:Thanks for the insight Sean; your words of warning make me somewhat nervous though!I'm only going to have free access to a machine shop for the next year. After that, I'm on my own. I am hoping that I can work on this project maybe 5 hours a week over the course of 4 months and have something capable of astrophotography with a 80mm refractor, 400-500mm focal length, and with autoguiding for both axes. I would like to take this project from paper, to CAD, and to the shop. I want it to be well thought out and have as few hiccups as possible. That means learning from other people's mistakes, and modifying only slightly existing designs. Are there any freely/cheaply available GEM CAD files out there? The pillow block mounts seem like a good compromise if I decide the project is too ambitious. However, these mounts have the RA gear hanging below the bearings -- from the discussion above, isn't this undesirable?Also, from your experience, am I looking at saving money for the quality of mount I produce? Or will I be producing a mount that on the market could be had for cheap. My hope is to come out financially on top of the game, and not at a loss. I don't have a good sense of material costs, but if I use aluminum for the bulk of the parts, then the bulk of the costs would be in the gearing. Unless, that is, I make my own gears. Though the trend seems to be that people purchase the worm gears, then machine the spur gears.
Ed Thomas Deep Space Products www.deepspaceproducts.com
Quote:I am by no means an excellent machinist. I'm a beginning machinist with very little experience. I might have access to some scrap material, but a lot of it will have to be purchased. I will have the guidance of excellent machinists, if that's worth anything. I'm a maker at heart, and if I see a way to do something myself, I'll (try to) do it myself. If nothing else, it would be an excellent project to become more familiar with the mill and lathe. I believe I saw a video of the Atlas slewing and it sounded like a stepper motor that was being microstepped. Would that be a correct assumption? If I plan on using a guide scope, would encoders really be necessary (ignoring GoTo capability for now)?
Quote:I would suggest not having so much overhang on the Dec.
http://txstars.org/ "It's not a 12 Step Program it is a 12 shot Roll" Equipment: Yes