Thank you for the prompt response, I wish the company I bought the EAF from would respond to my two emails and three voice messages. As you likely know, frustration builds the longer it takes for someone to respond, I would have been satisfied with a quick "got your message and will get back to you as soon as we can". Something like that would have at least told me someone was monitoring incoming messages.
I responded to your message by detailing everything that I could recall doing after the focuser failure, I did feel it was a little long, but without the facts how would you know how to resolve or assist my efforts to fix the problem? Near the conclusion of my message, I remembered something that might have contributed or actually caused the EAF to fail my tests. About a month ago I figured a little lubricating oil here and there would be helpful around the OTA focuser knobs. Without knowing much about Crayford focusers, I knew there was a ramp attached to the focuser tube and just maybe some of the oil got on the ramp. It was then I decided to remove the focuser from the OTA and take a closer look inside it. I detached the EAF again and upon closer inspection of the ramp and surrounding parts, I discovered smeared oil on the ramp. I figured having oil present would negate any friction required for the ramp and rotating rod to work together.
I opted to clean all the parts I could access with solvent and not a degreaser, thinking the latter was mostly water and water is a source for rust to form on metal parts. I really went at it with solvent and Qtips, reaching as far as I could to clean the ramp and the four guide wheels alongside it. I tied Qtips together for a longer reach and was eventually satisfied I got most of the oil residue out of the mechanism.
In my previous multiple tests of the EAF, all failed with the focuser traveling about 5 to 7 mm before it stopped and the alarm sounded continuous as long as I had my finger on the controller button. In some subsequent tests, the distance traveled was even less, but now I reasoned it was because I was spreading the oil around more. However, after my cleanup effort, I am pleased to say the EAF was now operating normally! I pressed the issue by attaching my DSLR to the imaging train and the EAF moved it back and forth without any stalls or interruptions.
I won't claim victory just yet, I have to try it using my recently purchased ASI AIR PRO PLUS and see how it goes then. But for now, things are looking good. One caveat, ZWO stated Astro Tech products were supported, it may be mechanically, but what generation telescope focusers? I own the first generation 106 triplet APO and the best fit I could get to secure the bracket was one threaded hole on the OTA focuser. I tightened it down firmly and I'll try and remember to check it now and then going forward. If there is any backing out or sway, I might try some blue thread locker.
Again, thanks again for getting back to me and I'll update this message after I've had a chance to use it more.
