Forgot one thing: these strain wave gears are not made with stainless steel and the flexible cup gears will eventually rust out. Rolando

With a strain wave gear you can correct the average periodic error to some extent. Problem is that one PE curve does not fit all the errors because the error is a variable from one tooth to the next.

Wow what does a battery setup like that cost? -- Brian Brian Valente portfolio brianvalentephotography.com

Hello again In SGP, once I have unparked the mount ,the Current telescope's position displayed from the Software does not match the reading of RA/DEC from the ASCOM driver, especially in Longitude?

While often my dark sky imaging involves camping, so this is definately overkill, but I parallel 2-100Ah LifePo batteries and a 2000w inverter that I leave in the truck. Then run an extension cord to

How many arc seconds was each pixel? Rolando

The specs for the high end strain wave gears list the periodic error as being 90 arc seconds max. So it's possible to get that large an error, although most might be less. However, it's not the max

One problem with very fast guiding is intermittent loss of guide star due to very short guide exposure. Some places you might get bright enough guide stars for a .5 sec exposure. Other places you

Jeff, Out of curiosity, do you find the 1500x to be a bit overkill at dark sky sites for a night of imaging, or are you exhausting it down quite a bit? I do well with a pair of AGM 12V batteries in

Can you repeat the meridian flip with modeling turned off? Also, in which axis is this happening? Also, can you run a 5 second image after meridian flip to see if the stars are round with modeling on.

Hi Ray, both Curent site and Mount RA/DEC are now synchronized thank you very much Phil60

True. I now use a GoalZero Yeti 1500x at dark sky sites, and also at home. It’s about the size and weight of a car battery (I move it on a furniture dolly). This replaces 4 deep cycle

That's very nice. Rolando

One thing to keep in mind: Linear power supplies usually have large capacitors on their output line (because they have to filter 60hz ripple). These can hold power for up to a second or more depending

Hi Phil60, The latitude/longitude of the mount can only be set when the mount is initialized at power on. So, setup the driver with your latitude/longitude in the driver and power cycle the mount.

Hello everyone, This is my first post in this user group, looking forward having exchanges with experts I am having a question about the ASCOM V2 driver (5.30.10) which could be the cause of a

Is the elongation in DEC, RA, or a combination f both?

I think there may be a way to do effective PEC with a strain wave gear. Basically, characterize at least 180° and maybe even all 360° of the gear with a tracking compensation data set. Not a big

As the originator, what I was interested in was the info Roland gave us a few months ago regarding the limitations of strain wave gear mounts, and the reason its difficult to correct the for inherent

For those that want to discuss the ZWO AM5 mount, there is a new groups.io group for doing that. https://groups.io/g/ZWO-Astro -Christopher Erickson Observatory engineer Waikoloa, HI