View Full Version : Cliff Cady's EZ-Trim Altitude Hold

Tony Kirk
08-02-2006, 09:31 AM
Being the experimenter that I am, I ordered the parts and had a circuit board made for the EZ-Trim Altitude Hold that was designed by Cliff Cady, see http://members.aol.com/_ht_a/ccady/eztrim.htm for more info.

I currently have the unit running on my workbench using the Proportional, Integral & Derivative (PID) process control algorithm S/W PID011501.bs2.

I'm wondering if anyone else has an EZ-Trim in their RV and if they've successfully tweaked the BasicStampII software for decent performance in an RV? I guess I should have asked this question BEFORE I built it!

Specifically, I'm looking for the initial settings for the 15-turn pots used to set the Proportional and Integral numbers so this A/H will work good in an RV.

Any other tips and trick (or S/W) for the EZ-Trim would be appreciated.

I know others have tried the EZ-Trim unsuccessfully, but I'm willing to tinker with it for a while before I drop a couple grand on a REAL altitude hold system.

I really like the Trio EZ-2 A/H and I got a wonderful demonstration of all it's features at Osh last week. Maybe someday after I get tired of experimenting with this EZ-Trim.


08-02-2006, 09:47 AM
I had one in my rv-6 and it was absolutely horrible.
Since it only actuated the trim motor, it could never react and move fast enough to be successful.
Little data from it on this page (http://www2.mstewart.net:8080/michael/rv/systems/panel/components.htm) .