KK, like you've suggested on PM, An option would be: 1) Use liner from koffeekosmo.com.au 2) With my inner pot, I would need to cut it and rejoin it. My next question would then be, would the distance from the TO to beans matter? Any minimum height from roaster to beans to observe? I did notice that for smaller batches, you recommended using a Chinese colander. Just thought I'll ask again here.
100mm to 150mm is a good distance from heat source to beans
As with insulation: 1) I will be attempting to source ceramic fibre. I should have a 10mm gap between the outer surface of the liner and the internal surface of the outer pot which I will line it with ceramic fibre. If this is still insufficient then I'll consider insulation to the applied on the outer surface but as of now, I am still trying to avoid it, just for things to look nice.
10mm of insulation should be ok
Moving on (with the 12V DC motor): 1) What are the specs of the motor from koffeekosmo.com.au other than it being a 12V/2.5A 70rpm motor. Is the motor torque of any consideration? 2) 70rpm optimal or should I go variable speed motor?
1 - The current at Max eff is about 0.6Amp, at Max output power is approx 0.76Amp, the stall current is 2.4Amp. The motor data is 12VDC, 68RPM at No-load, 50RPM at torque of 5Kg.cm. 2.73Watt output power 2 - The motor any motor will free run at the designated speed and will run slower under load dont use a speed regulator as its not necessary This drawing is a cross section of the kit roaster, it also shows the insulation placement KK
