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Ok, so I've just built my rostock max v2 and upgraded the hot end to a all metal head (e3d v6). I changed the repetier settings using this from the assembly page.

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

After changing the settings to those. I also changed line 571 to 285. But when I try to get the head to warm up it only goes to 222c it will fluctuate between that and 225c. But it mostly just sits around 222c.
Any help with this will be appreciated.

So after rebooting everything ( pc, Printer) It now goes up to 240.0 and fluctuates from that to 240.4 and back.
Not to sure what's up with that but I'll keep trying.

Also while re-uploading the repetier file to the printer I did just get a message (Low memory available, stability problems may occur)
Not to sure about that one either.

And finally if I re-uploaded the repetier file to the printer does that mean that the whole calibration will have to be done again or just the z height?

Hi, you need to change the max temperature of the hotend. By default it's 245ºc if my memory is right.

#define MAXTEMP 300

#define MIN_DEFECT_TEMPERATURE -10
#define MAX_DEFECT_TEMPERATURE 300

The last 2 are extreme values to detect defect thermistors.

Tried those settings as well, still maxes out at 242c. Maybe it's the arduino upload not uploading correctly? I'll try a different pc tomorrow just to be sure. If anybody else has any ideas please let me know.

If your PID max value is too low, you'll experience the exact issue you're seeing here. What is it currently set to?

g.

Good Morning,

My (EXT0_PID_MAX) is set to 300 after this morning. It was 255 after I changed it I tried to get the hot end to heat to 250 and I still it only got to 244.4c.

flip807 wrote:Good Morning,

My (EXT0_PID_MAX) is set to 300 after this morning. It was 255 after I changed it I tried to get the hot end to heat to 250 and I still it only got to 244.4c.

I believe the values are 0-255. 255 being 100%


// maximum time the heater is can be switched on. Max = 255
#define EXT0_PID_MAX 255

This line tripped me up, I was able to raise my temerature in the gcode, but until I changed the definition in this line "UI_SET_MAX_EXTRUDER_TEMP" it would reset to 240 whenever i tried adjusting the temperature at the printer itself.

OK so I went ahead and used my laptop and installed the arduino program and started from scratch. I cleared the eeprom. Got the Repetier firmware changed all the things that have been listed on here.
examples of what was changed
Line 187: #define EXT0_TEMPSENSOR_TYPE 8
Line 571: #define MAXTEMP 300
Line 579: #define MAX_DEFECT_TEMPERATURE 300
Line 701: #define MOTOR_CURRENT {155,155,155,165,0}
Line 1240: #define UI_SET_MAX_EXTRUDER_TEMP 300

I uploaded the firmware and then I tried to get it to heat up to 250c. This time it came closer than any other time but it never reached 250c. It fluctuated between 248.1c and 246.8c.
I've also been trying to get it to warm up to different temperatures. From the three temps I tried it seems to always just be short of hitting the mark.
for example when I tried these this is where it warmed up to:
230c = 226c-227c
250c = 246c-248c
275c = 266c-267c
I'm not sure what all this means, maybe it's the thermistor? I made sure that the sleeves that you have to put on it were pushed all the way to the thermistor itself when I mounted it on.
Anymore ideas or help will be appreciated.

Did you get a 40w or 25w heater?

I have 2 e3d v6's, one of them with a 40w and one with a 25w. The 40w gets up to whatever temp just fine using PID control.

The 25w one though, would never get up to temp using PID. It would PID autotune at whatever temperature just fine, but during printing, it wouldn't.

I changed it to use dead-time heating instead and it works much much better. If you got a 25w heater, try that.

I ended up getting a 25w heater(blue leads), how would you go about doing dead-time heating?

See the Setup section at http://www.repetier.com/dead-time-control/

I didn't measure my dead time with the graph method they suggested, I just fiddled with the number until I got the behavior I wanted. I think I wound up with 0.6 or 0.8 or something like that.

OK so here's my update to the situation:
After trying many things and changing the firmware around without any real success I finally got it to heat up to the correct temperature. The only issue that I've found so far is that it won't go past 267.8c

Why it worked is still beyond me but this is what I did.
Like I mentioned I tried various things all day and I finally had given up and was going to change the head back to the stock head so I could print this weekend. I removed the heat wrap from the power cables where I had spliced them together and then I decided to test it out again just to see what would happen. This time it reached the target temp 228c without any issues, I then tried 250c and it worked fine, then I tried 275c and it only got to 267.8c. But since I'm just starting out with ABS I should have plenty of heat for that.

If any of you have any ideas as to why that worked to fix my issue please share it with me. In the mean time I'll be looking for a way to cover the exposed wires so I can keep getting the correct temps and have a safe and clean working printer. Thank all of you that tried to help me out with this issue. Hopefully I'll be able to help you guys out in the future.

Check those cables again.

Tjey could be making a weak connection.

Weak connection = high resistance.


The hotend and the bed are also resistances.

And i am pretty sure you no not want a heat source on your cables.

Good Afternoon,

I'll definitely try that next, I would also like to give you guys a update as to what's been happening since then.

After being able to get the head to heat up to somewhat the desired temperatures. I found out that when I told it to print anything it was still doing the same thing. It would always seem to heat up to just below the required temperature. So like I mentioned when I told it to print a calibration box it would always just heat up to 223.8c. Even though if I told it to just heat up to 228c it would. I ended up switching back to the stock head and that works great without any issues. Heats up fast and always get to the correct temp. I'll try to go back to the e3d v6 head in a little while. I want to check the thermistor to make sure that it was installed correctly and is not shorting itself out. Aside from that and not using the shrink cable wrap on the cables I really don't know what it could be. Maybe the heater being the 25 watt version but I doubt it since that would just mean that it would take a bit longer to heat up.

Any help is still appreciated and hopefully if I figure out what the issue is I will definitely post what the fix ended up being.