Discussion in 'E3D-v6 and Lite6' started by Tiguu, Mar 13, 2014.
I had installed both the new airtripper Bowden extruder and E3D hotend on Prusa i3 and was able to print the first cube but not beyond 30 minutes of printing.
I had explored changing the Vref (0.4 to 0.54V)and increased the feedrate in the firmware and it does not help.
In fact while checking on the Vref and saw smoke coming of the RAMPS and I had burned the board.
It felt like something is clogged in the hotend. As I was able to run the extruder without extruding filament. When It start skipping, I was able extrude without the filament and it was not skipping.
I had tried having a fan blowing on the heat sink Pololu driver, and it does not help. I am printing PLA at 190 to 210C, with the hotend fan at 100%. Print will start after 5 minutes.
Any help would be appreciated. The cube printed quality is great and I am frustrated it would not go beyond about 30 minutes.
I am making sure the single hotend work before dual hotend. Everything is ready for dual hotend and replace the RAMPS board.
You didn't say but I assume that you are going to use a bowden system to put dual extruders on the I3.
using that type of stepper motor to make your extruder, I have seen it solve many problems such as yours.
be made from ABS because it can handle heat better then PLA.
I am using Wantai 42BYGHW811 and all parts are in ABS.
Please let us know the results of your tests.
Normally when it comes to jams the problem is cooling, but it sounds like you are cooling everything just fine. It also doesn't sound like there is a problem with your driver..
What thermistor is configured as in Marlin - having it set to the wrong type can cause the actual hot-end temperature to be lower than the measured temperature and thus jam.
What retraction settings are you using in your slicer?
The thermistor is set at #define TEMP_SENSOR_0 5. How do check the setting in the firmware?
Could it be how I installed the sensor?
OK, your thermistor is set correctly and so should be reading the correct temp. The only other issue that there could be with the temperature measurement would be caused by you having taken the HotEnd over 300degC. Do you think this has ever happened?
A retraction of 4mm is a sane value, how long is your Bowden tube? Does the problem go away if you reduce it?
I have not passed 300c and the Bowden tube is about 400mm. I had just re-attached the thermistor and it's still the same issue.
4mm for a 400mm bowden tube sounds a bit excessive to me, I would try reducing it to zero - seeing if the problem goes away (even if your prints are messy) then gradually increasing the retraction settings until you get clean prints.
the filament will get stuck and I had to pull it all the way out and restart again before I get smooth flow.
I had some blog that the nozzle need to be seasoned. Hence, i added some olive oil on the filament.
longer stucked and I get smooth flow.
maybe due to low E-Steps.
I changed to Rich's geared extruder, I was able to print without the filament getting stucked.
However, while printing I was not getting any filament flow and this was on the large print on the first layer.
the fan is always on.
Success. I was able to print for 1.15 hrs. And for the next 3 prints each about 1 to 1.5 hrs.
seasoning with olive oil helped alot, and the nozzle fan is very important too.
I will go back to the Airtipper has it much less parts to print for my dual hotend.
For now, I am happy with the E3D nozzle and my print.
PS. I had also changed the extraction length from 4mm to 0.5mm and print quality is good.
as Sanjay has indicated, was indeed too much for a bowden system. Good job in figuring out the correct value.
All in all an excellent job, well done!
How are you getting on with your now-seasoned nozzle?
Great. I have not had any problem since.
I was able to print an extra Rich's Bowden gear extruder for my dual hotend and full set of wade direct gear extruder and cooling fan. I was able to print for 3 hrs followed by a remove and print again immediately for another 1hr.
I have not gone back to the airtripper extruder yet due to time. Next goal is dual hotend.
It's good to hear about success stories, great job in getting everything working!