I just finished installing my V6 and I was going through the settings and I've update the settings based on http://wiki.e3d-online.com/wiki/E3D-v6_Assembly but I'm not sure what i should set for #define EXT0_PID_MAX . The polycarb i have says a range of 265-285C. Can anyone here comment based on their setup? Can i leave the PID_MAX to 255 and still get to 270ish if needed? or should i set it to 280C do autotune then set it back to something lower? I want to be safe but keep functionality.
Repetier
Use thermistor definition number 8:
#define EXT0_TEMPSENSOR_TYPE 8
Or select "ATC Semitec 104-GT2" if using the Online Configuration Tool (v091)
For safety it is strongly recommended to do the following:
Limit the Max PWM value (EXT0_PID_MAX xxx in the config file) to ensure that current is limited to a safe value.
Set the Minimum defect temperature to ensure that the thermistor shorting out is caught by the firmware.
New in Online Configuration Tool (v092) are the two options to also improve safety:
Decouple hold variance and Decouple min temp. rise to detect the thermistor coming loose. These must be set appropriately for your system to ensure that they work properly.
Upload the new firmware to your electronics.
Here is what I currently have, let me know if you need to see other values:
awesome thanks! I did the autotune with it at 255 so I'll do it again. What are your retraction and feed settings? I think mind need to be adjusted after seeing this first test print.
MAJOR HEATING PROBLEMS: recent change out from stock extruder to E3D v6. I have reinstalled the new hotend three times and corrected the firmware settings(Therm #8) and redone the PID settings, but it won't stay hot, and I am not certain that it ever reaches the setting temperatures, because the prints have all failed to bond to the plate or to bond plastic to plastic. The temp readings on the LCD and in Mattercontrol look perfect. Temp runs up to the setting and I can test extrude ABS for a while. When I start the print, the extruder either jams immediately (especially if it sits for a few minutes), or it prints a few lines that detach and tangle. Then the extruder jams. I have taken it apart, and it appears that the extrusion has gone below melting temp and jammed. I have taken the coldend apart twice to see if it is failing, and I will have to say, it is a pretty wimpy design. But it is not the problem. It just grinds away on the filament, which is stuck fast.
A very great mystery is this: My infrared temp tester, which is accurate, shows that my print bed reaches the 70 deg setting, but the nozzle tops out at 26 deg. The heating plug itself tops out at 40 deg (according to the laser). It is hot to the touch, but not dangerously hot. Meanwhile it is reading 225 on Mattercontrol and on the LCD, and the fan is switching on as per the temp setting. But no way is it reaching 225.....or it is shutting down.
I'm not technical enough to play around in Repetier, but I can see enough code in there that deals with shutdowns and retractions and math lessons and other scarey concepts, that I wonder if somehow the Repetier has been compromised, which would be a very difficult trouble-shoot. I have had ideas, but perhaps someone has a better one.
1) Thermisters tend to look alike. How would I know if the right replacement was sent when I broke the first one? The settings are very different.
2) How can the heat plug read 35-40 degrees c on a laser thermometer and 225 on the thermister? The laser reads the hotplate perfectly and agrees with Repertier.
3) Can EEPROM settings conflict with firmware? Repertier numbers extruders from Ext0 to Ext5. The EEprom starts with Ext1 as the default. Conflict?
4) I have redone the PID set-up 3 times and gotten very different readings each time. I EEPROMed all of them, but none of them have corrected the problem.
5) Is there a bug out there in Repertier re thermister settings?
6) Are there any heat shutdown processes that lurk in the software and might be triggered by ignorant setter-uppers (like me)? Retraction triggers? Timeouts? Safety defaults like short-out protection?
I sent you an email joseph, but this could be useful for others on the forum
It's possible that you got a defective thermistor, but typically that will throw a mintemp error right away.
A couple of things to check:
1) Have you checked to make sure that the leads on the thermistor are completely shielded and not touching the heater block or the set screw that holds them in place? If you over tighten the screw that holds the leads down, it's possible to have a thermistor lead ground on the screw/washer through the nylon insulation. If one of the leads is touching anything, this can/will change the resistance and will thus affect the temperature reading.
2) The IR thermometer isn't very useful on the hot end. First, the surfaces are all reflective which throws the reading off. Second, you're picking up the temperature on the surface, which will definitely be cooler than 4-5mm in the heater block where the melt zone is. For an accurate reading or confirmation of the temp, you would need a thermocouple - ideally it's set in a blind hole in the heater block at the same depth as the thermistor.
If you have a multimeter, you could verify the resistance on the heater cartridge - should be in the neighborhood of 3.5ohms for a 12v 40w cartridge. You can also verify the resistance of the thermistor. At 77F, the 104-GT2 Semitec thermistor should read 100k ohms.
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