Eko: Puffing and Purge cycle question

For those of you with the newer Eko controller (or any other gasifier with a purge cycle for idling):

What experience have you had with different purge timing? Reason I ask is that I'm experimenting with controlling combustion temperature by modulating the blower speed. Problem is that with a fresh load on hot coals, the combustion temp gets well above my setpoint, and the fan ends up running at minimum speed for a long time. This causes 'puffing', and I expect that periodically running the fan on high for a few seconds might be the solution.

How often should you run a purge cycle, and how long should the fan run each time?

My Econoburn is set for 20 second fan cycle every 15 minutes.

gg

I run mine for 30 sec every 2 min to keep it from really puffing

That gives me quite a range - I'll do some tests over the next few days and report back.

I set mine the same as Taxi's but I havn't played with it, try to avoid idle, especially with full load. It's always a pleasure reading your posts Nofossil, I've read this site since 2009, good scientific method to burning wood gets the best pyro in all of us going.

TS