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not 100% that I am sure but..
Threads we post --OP can mean Original Post ?Poster,
The 'sections' are more called sub-forums.
Your thread in another place--IIRC 'Experiments'
'intro' threads in welcome/newcomers section. .Iwant to meet other forum folks --you should do that in your intro --unch (in Tx)
met myb 80 members at 5 SELEM Laser Meets-- again 99% great people. len
Upon completing how to build a cnc laser module ( by back tracing circuitry elements and looking up what they were) and activate the ttl/pwm signal to set the board without an engraver running, I moved on to a cooling system. I built the cooling system of Tec chips and controller boards ( like many circuits before). Keeping the laser at a steady 65 degrees F and the steppers at a nice balmy 80f.