katatak wrote:@ OP, did you resolve your issue? What is your take on the Arc 800g?
Anyone else have experience on one? Thank you for your input, pros, cons, etc.
Hello katatak, so here is what happened.
I called Arc asking about my problem and wish to find a solution. I asked about the possibility of swapping in with a thinner probe for better accuracy, they said i could but would have more noise(if using datalogger) and would actually make the pid more skippy.
so to answer your question, no, my problem has not been resolved, i just adapt to the way the machine responds, and plan accordingly.
Here is my take on the Arc 800g
1. setup is easy, there are only 3 pieces to install after unpacking, (exhaust fan, exhaust tube, cooling fan tube) which is easy.
2. Total pre-heat time is about ~20min. it can be faster, but from my experiment, 20 min pre-heat time will let me have a consistent roast from the 1st batch till im finished, anything less i find the first batch takes too much heat from the drum.
3. PID have 2 different display setup, so depending on your liking, it can be set to whichever you prefer. Both display theme shows bean temp. in-drum air temp, exhaust temp, and Time, the difference is in the display orientation.
4. adjustable drum speed
5. even roast, which shows good heat transfer from the drum and air.
6. no beans get stuck inside the drum, some times there will be a couple of straggler beans that refuse to come out when ejecting, but so far i have not had this happen to me.
1. drum rotation noise, you will hear a clicking noise if you have the drum speed set at medium range, and it gets progressively louder the faster it spins, it's not obnoxious, but it's audible.
2. unsteady gas pressure, first 30 min after ignition, the gas pressure will gradually drop till the flame cuts out, unsure of the issue here, part of me thinks the reason is due to the propane tank has not yet reached a steady outflow pressure, after the first 30 min, gas pressure will be steady.
3. gas pressure knob, its a nice design with a lock on it so you don't accidentally bump it. the problem is its too sensitive, you could go from max pressure to zero in less than a half turn of the knob, so adjusting gas pressure becomes somewhat tedious, got to be very careful.
4. PID/temp probe, as my original post stated, the temp reading on the pid doesn't read smoothly, it skips a little.
i've created lots of great coffee from this sample roaster, the operation is as easy as it gets, build quality is really nice as well, for the price($3800)its a great beast nonetheless! as for the cons i listed, im sure i'll get used to it in time then it won't be a problem for me later. I hope this is of some help for you and wish you the best of luck in search of your own roaster.