Guys,
There is one problem with testing Ek's box with hyperterminal and "Q" command.
I think David forgot to explicitly note, that first you have to set the encoder resolution..
In other words, if you type the following:
z1010
you will get response "r". This is described in protocol (at the bottom of this page:
http://eksfiles.net/digital-setting-...t-description/)
From then on, the box works OK.
I had similar problem when initially testing mine but I did not pay too much attention to this because I then connect the whole thing to computer running Bartel's scope.exe and everything was fine...
Now I remembered the situation when Bob's box did not change the coordinates despite encoder being moved. After setting resolution to anything (in this case 1010), it started to respond as expected.