Aritomo Shinozaki, DeepSkyWest
Aritomo:Will SB consider some type of upgrade to the Paramount ME to have closed-loop encoders like the AP 1600 GTO?
Here's a related thread on this subject: http://www.bisque.com/sc/forums/p/12904/48852.aspx#48852
(We're hoping to incorporate absolute encoders in future mount designs.)
Daniel R. Bisque
Software Bisque, Inc.
862 Brickyard Circle
Golden, Colorado 80403-8058
Office Hours: 8 a.m.-5 p.m. Monday-Friday GMT-7:00
I was checking with the TDM inventor (the closed-loop encoder guy for various mounts) and he says he has a prototype working for the Paramount ME. I'll investigate further and pass along anything I find of interest.
Aritomo:and he says he has a prototype working for the Paramount ME. I'll investigate further and pass along anything I find of interest.
Step one of the installation procedure on this web page is very disconcerting.
Are the manufacturers of this product aware that the "circular cap" they recommend removing is integral to the mount's structural design and integrity, and defines the preload of the right ascension bearings?
This is akin to replacing the lug nuts on the wheel of your car. If the replacement components are not designed properly, and the correct torque applied when tightening the replacement component, the results can be catastrophic!
Eek. That doesn't sound good. Shame though as it may have helped hold up the value of the generation 1 ME's.
I have already per-ordered the ME II to replace my version one - would have been a nice option for whomever buys my one.
While I can appreciate your concern that modification work is done properly, isn't "catastrophic" a bit ovr the top? Lug nuts are removed and millions of wheels are replaced everyday. My ME is long out of warranty and if I decide to install an aftermarket product like the TDM, isn't that my risk? What is the spec for the RA bearing preload? What is the recommended torque for the cap?
trimil:isn't "catastrophic" a bit ovr the top?
trimil:Lug nuts are removed and millions of wheels are replaced everyday.
trimil:My ME is long out of warranty and if I decide to install an aftermarket product like the TDM, isn't that my risk?
trimil:What is the spec for the RA bearing preload? What is the recommended torque for the cap?
I would like to make a couple more comments. First, it is great if there is an aftermarket item that offers benefits to the Paramount ME. It would have been nice to receive one of the units before going to market so that we could insure it does not compromise the original design. For example, the replacement nut should be properly sized so it makes contact with the inner race of the bearing only. The thread engagement should be sufficient to handle several hundred pounds of preload.
Note: If this component were placed on the declination axis, poorly machined threads could result in the entire declination gear assembly (and telescope) dropping out of the mount when the meridian is crossed. While the right ascension axis never goes "downhill" in this manner, it is important to be keenly aware of this component's purpose.
I realize we might sound overly cautious but the instructions provided indicated "as tight as you can by hand", and this will probably work fine most of the time. But if there nut has no grease, and the threads are rough, vastly different results will be obtained. There are hundreds of ways this part can be made improperly, hence our concern.
I trust the suppliers of this add-on have done their homework and tested the results. Does anyone know the resolution of the encoder?
Stephen M. Bisque
OK well, maybe its me, but I looked at this gadget, and if you look at the installation it shows it being placed on the back of the PME where the cables go through....ummmm....what am I missing here??? Lots of references to the RA shaft but I don't see how this all comes together someone refocus me please!
www.astrometrics.com Dome Controllers
I looked at the installation instructions and if I am reading this correctly they have the encoder attached to the pome where the cables go through the mount. I mmean the picture couldn't be clearer so how has that got anything to do with the R a? Someone please refocus me please!
peter27284:Lots of references to the RA shaft but I don't see how this all comes together someone refocus me please!
Peter, that place where the cables go through and the encoder attaches is one end of the RA axis. It isn't just an opening where cables go through, but is the hollow RA axis itself.
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