Extruder Temp Sensor

ebross

I recently bought a Hatchbox Alpha Delta printer. The hot end was inadequate for printing anything other than PLA or ABS. I changed it to a E3D V6 hotend. I received the source firmware from hatchbox, which is Repetier v92.3. The stock extruder sensor on the Alpha is Type 1 in the configuariona.h file. I changed the Type of Sensor to Type 8, as directed by E3D website. I'm having a problem with the stability of the sensor. When I set it to 240°c it heats up correctly, but when it starts to print it drops to 220°c, and wont stay at 240°c. Can I just switch the type in the configuration.h file or do I have to do something else? Thanks for any help.

Roko

PID tuning?

Repetier

Change pid to give more power. Especially max pid could be a problem if you can not come up.

ebross

I ran M303 P0 S180, and this is what I got.

10:51:11.924 : Info:PID Autotune start

10:53:02.061 : bias: 109 d: 109 min: 178.91 max: 181.57

10:53:12.522 : bias: 100 d: 100 min: 179.00 max: 181.35

10:53:22.613 : bias: 104 d: 104 min: 179.00 max: 181.01

10:53:22.613 : Ku: 65.84 Tu: 10.55

10:53:22.613 : Classic PID

10:53:22.613 : Kp: 39.50

10:53:22.613 : Ki: 7.49

10:53:22.613 : Kd: 52.10

10:53:32.437 : bias: 101 d: 101 min: 179.00 max: 181.12

10:53:32.437 : Ku: 60.56 Tu: 10.34

10:53:32.437 : Classic PID

10:53:32.437 : Kp: 36.33

10:53:32.437 : Ki: 7.03

10:53:32.437 : Kd: 46.96

10:53:42.245 : bias: 102 d: 102 min: 179.00 max: 181.01

10:53:42.334 : Ku: 64.57 Tu: 10.31

10:53:42.334 : Classic PID

10:53:42.334 : Kp: 38.74

10:53:42.334 : Ki: 7.52

10:53:42.334 : Kd: 49.91

10:53:42.334 : Info:PID Autotune finished ! Place the Kp, Ki and Kd constants in the Configuration.h or EEPROM

The current settings in EEPROM are:

Control Manager: Deadtime

Deadtime: 7.00

Control PWM: 230

PID MAX: 250

Control Manager: PID

PID P: 7

PID I: 2

PID D: 40

Drive Min: 40

Drive Max: 230

How should I adjust the settings? Thanks for your help!

Roko

I'm running version 92.8 so my EEPROM Settings under Repetier-Host show a little differently.

I have a setting for Extr. 1 Heat Manager 1 (0-3)(set to 1)

The rest plugin to the appropriate line.

A person more familiar with that version92.3, might be able to help

Repetier

If you use PID you need to use PID controller or the values make no sense.

For dead time you might need to change dead time (P) or increase control PWM (or drive max in pid if it is not enough).

ebross

I switched to the PID controller and put in the values:

Kp: 38.74

Ki: 7.52

Kd: 49.91

The hot end is working and holding temp at desired setting. I could not get the Deadtime controller to work properly. no matter what I set it to it was swinging widely. I guess I will stick with PID for now.