I tried the glass bowl a couple of times last night. The vapor production seemed a little weaker than with the metal bowl, but the vape still produced some impressive clouds. ABV was lighter and more even with the glass bowl.
More importantly, it seems like the Roffu doesn't always vibrate when it reaches temp in On-Demand mode. Here is the behavior I observed last night when using On-Demand mode:
- First button press - heating light flashes until the set temp is reached. Unit vibrates. Draw timer starts counting down from 45 sec. AFTER the set temp is reached.
- Second button press - heating light flashes until the set temp is reached. Unit does not vibrate. Draw timer starts counting down from 45 AS SOON AS BUTTON IS PRESSED.
- Repeat #2 above
It's confusing and I need to try some more to figure out what is going on.
Started Day #2 with the Roffu using the metal bowl and On-Demand mode. Huge cloud on the first hit. Super hot vapor and a big cloud on the second hit. Little to no vapor on the third hit (bowl was fully extracted). ABV had a few black spots but mostly dark brown.
The Roffu hits hard.
I did get the vibration on the second and third hits. I think it was because I waited long enough between hits to allow it to cool down some..?
Both the glass bowl and the metal bowl get EXTREMELY hot during use. It prevents me from re-filling right after a bowl
It makes me wonder if there is some conduction going on. I'm not sure that the material comes in contact with the extremely hot bowl for long enough to produce conduction heating, but I can tell you the bowl (and the area around the bowl) gets way too hot to touch after using the vape at full temp.
-------EDIT:
I followed the cleaning instructions in the manual. They recommend a burn off cycle for two minutes at max temp after a cleaning.
I turned it on with an empty metal chamber, set it to Session Mode, and let it heat for two minutes
without drawing. After the burn off cycle the metal bowl was EXTREMELY hot. No hot air was drawn through it. I can't see how that wouldn't cause conduction heating, unless it doesn't get quite hot enough...?
I am not able to test this with actual material in the bowl right now so I can't say for sure.
-------EDIT #2:
There appears to be a bug in the Roffu software that prevents it from vibrating when it reaches temp in On-Demand mode under certain circumstances. If it is NOT the first button press, and the user has NOT changed the screen in some way, the device will NOT vibrate when it reaches temp in On-Demand mode. If it IS the first button press, or the user HAS changed the screen in some way (clicking 3 times to get to the puff counter, or just allowing the device's auto shutdown timer to kick in) the device WILL vibrate when it reaches temp in On-Demand mode. It appears that the user must actually go to a
different screen, not just make a change in the
main screen, in order to "reset" the vibration function. That means you can't just lower or raise the temp in the
main screen, you actually have to go to a
different screen (like the Puff Counter screen) and
back to the main screen to reset the vibration function in On-Demand mode.