Hi Guys
I am having problems with overheating. Target temp set to 235 as have a nozzle that drives hot.
When printing the temp is allowed to go to 582C, Why?
Is there no high temp shut-off in Gen-6.
Best
F

Does your nozzle really become >500 C or is it just the firmware that reports this?

(measurement).

Which firmware do you use? Maybe the new version works beteer as we have updated the thermistor table in firmware I think somewhere february...

Lets just say that I get printing at 235C (indicated in repsnapper) suddenly smoke pours from the extruder area. My print gets a really hot shower and its very frustrating. By measurement of temp when I read 235 its actually 205 so 30C out, no doubt due to the placement of the thermistor. As soon as I hit pause, Actual temperature is shown to be 582.
I am using what I thought to be the current firmware through Arduino 18 to V2 Gen6.
F

When you run your current firmware at 235C (not printing, just steady) what is the temperature difference you see? is it very much like oscillating?

Try http://www.mendel-parts.com/downloads/firmware/GEN6/ newest release and try again. I've seen this problem before due to wrong thermistor tables...

Hi yes the temperature ocillates very much. I shall get the download and try it.
Its been impossible to print as I am sure there are variations during the print even though the actual temperature and target temp, stay constant during the print.
Thanks for the help, hope it solves one problem that I have.
I am waiting for a new nozzle from you guys but perhaps the temp is the problem.

Best
F

I uploaded the new firmware and it is better, however the temp is still moving up during printing.

When I hit pause in repsnapper its immediately up by 30C and I had another 450 smoking session just an hour ago half way through a print. It may be that the actual temp during printing should be updated in repsnapper. I wait for the next update and will check everyweek.
Thanks again
F

I think you are experiencing problems with the mounting of your thermistor/heater.

What kind of hot-end do you use? What kind of thermistor, heater (ohms) and how do you mount both of them? Which voltage? Can you post a picture?


At the moment repsnapper is reading +300C your heater led will probably be off. I guess you don`t have good thermal contact between heater-thermistor.

Hi and thanks again for the reply.
I have had trouble with my hotend and for certain there is some problem that I never managed to solve
Today I received your V6 nozzle and will fit it, as I am hoping that it will be the answer to my problem.
Are there any special instructions with V6? will check the site for assembly instructions.

Best
F

I am not an expert in this heater system as I only handle the electronic issues and developments.

I suggest you look for instructions or (when you`re busy) call Camiel. I think everybody could appreciate it when you post the interesting info here.

Oh I can handle it though the resistor supplied doesn't fit inthe hole. This is usual with this wire-round resistor as the sides are never parallel. Have to drill out the hole and pack it with fire cement or the heater resistor will blow. The thermistor needs heat shrink wrapper on both wires right to the tip, be careful not to strip it. Then just push in the hole.
Looks good this new v6 though I shall send Camiel my suggestion for v7.
Best
F