Dual extruders

[LorenOlepi]

I sure hope that you are the sharing type. Hint

Sharing is caring

[bubbasnow]

alright so i got both exturders moving, i am having issues when i switch to the second extruder with the displayed temp... it is showing 74 degrees when it should read 20 like the 1st extruder. they both are identical, i have totally switched wiring and it reads the correct temp so the wiring is good, the thermistor is good, i think i am missing something configuration wise now. i am running newest firmware, i did not have to change heat_1 to pin 7 in the pins.h it was already set.

[bubbasnow]

inside pins.h

#define TEMP_1_PIN 3

but on older pins.h i found in the forums

#define TEMP_1_PIN 1

ill switch this when i wake up to see if it helps

i currently have e0 hotend in t0, and e1 hotend in t1, and heatbed in t2

[mhackney]

bubbasnow, I am at about the same point getting 2 heads on my Kraken working under Repetier and RAMBo. I had 2 SeeMeCNC hot ends working early last year but now running into what are probably config issues. I have a RAMBo v1.1 board. Here is how I have my hot ends and bed heaters and thermistors connected with their pin assignments in Pins.h:

The pins assignment I verified from the RAMBo wiki here: http://reprap.org/wiki/Rambo_development

[mhackney]

Here's a little more oddness. I've noticed that the temp display line in RH shows a "false extruder" as shown in the red box in these screenshots. However, RH is configured for 2 extruders as is the firmware. Also, if I unplug thermistor 0, I see a nonsensical temp and similarly with thermistor 1 (as shown in these captures). That tells me the thermistors are configured to the proper pins as shown in my previous post.

[mhackney]

I am converting back to get a single extruder working and of course it is not.

So, yesterday I wired up the second extruder, hot end and thermistor. They were all connected to the RAMBo. I made some prints with my normal firmware configuration with the hot end 0 just to verify all was ok. Then, I made a copy of the firmware source files to use to configure for double extruders. I modified this copy and uploaded it. I also made a new printer config in RH for the double extruder config. That way, I thought, I could fall back to my original single extruder setup easily. So of course, now it is not working for single extruder either. I see a good temp display in the status line (without the odd false extruder I saw in the previous post) but the hot end does not heat up. I did not touch any wiring.

So I then disconnected the 2nd extruder plugs from the RAMBo and get the same result. This is similar to what I saw when I sent a RAMBo back to Ultimachines thinking I'd blown a fan output just to have UM verify that all was well. Very odd!

[mhackney]

2 steps back, 1/2 step forward...

So, perplexed, I thought "hmm, I should try replacing the heater and fan fuse (F3) in the event that it blew. I put in a new fuse and wa-la, I am back to operation on heater "0" (original configuration).

I have wired things so I can swap connectors from one hot end setup to another so I can now systematically test the setup for heater and thermistor "1". I have 4 more fuses so an experiment or two should be fine.

[bubbasnow]

well i am glad the gremlins weren't just targeting me this weekend.... but this news is better than having to mail it to UM and have them say nothing is wrong and taking a week to do so.

[mhackney]

And check that fuse!

I had a few minutes to try again with the new fuse. Stlll no joy but I didn't blow the fuse. But I also didn't try to power heater 1. Unfortunately, I have to get caught up on a lot of new orders I got this week (fly reel kits) - not a bad problem to have!

[bubbasnow]

something with seemecnc's firmware is really fighting me on this dual extruder.

i went and used the configuration tool to build a fresh copy, hooked hotend1 to h0 heat pin and its thermistor to t0, hooked hotend 2 to h1 and its thermistor to t1. i can control them perfectly in RH. i need to do a line by line and import the exact dimensions into this new firmware and i should be cookin with gasoline this afternoon.

[mhackney]

Hmm, I am using the .91 directly from Repetier and having problems. Could you post your Configuration.h please? I did not use the configuration tool - I've started a few times and get bored after 15 minutes of trying to figure not what's what. He does not use the same names in the tool as the #defines in the Configuration.h file for some things.

Also, what pins are you using for heater 1 and thermistor 1?

[bubbasnow]

alright i have it wired like this

[img]https://lh3.googleusercontent.com/-F2bO ... 152309.jpg[/img]

i have extruder 1 on heat0, extruder 2 on heat1, bed heat 2

temp 1 on t0, temp 2 on t1, bed t2

i took a fresh seemecnc firmware and modified it as follows

configuration.h

Code: Select all

#define NUM_EXTRUDER 2

//// The following define selects which electronics board you have. Please choose the one that matches your setup
// Gen3 PLUS for RepRap Motherboard V1.2 = 21
// MEGA/RAMPS up to 1.2       = 3
// RAMPS 1.3/RAMPS 1.4        = 33
// Azteeg X3                  = 34
// Gen6                       = 5
// Gen6 deluxe                = 51
// Sanguinololu up to 1.1     = 6
// Sanguinololu 1.2 and above = 62
// Melzi board                = 63  // Define REPRAPPRO_HUXLEY if you have one for correct HEATER_1_PIN assignment!
// Gen7 1.1 till 1.3.x        = 7
// Gen7 1.4.1 and later       = 71
// Sethi 3D_1                 = 72
// Teensylu (at90usb)         = 8 // requires Teensyduino
// Printrboard (at90usb)      = 9 // requires Teensyduino
// Foltyn 3D Master           = 12
// MegaTronics 1.0            = 70
// Megatronics 2.0            = 701
// RUMBA                      = 80  // Get it from reprapdiscount
// FELIXprinters              = 101
// Rambo                      = 301
// PiBot for Repetier V1.0-1.3= 314
// PiBot for Repetier V1.4    = 315
// Sanguish Beta              = 501

#define MOTHERBOARD 301

#include "pins.h"

// Override pin definions from pins.h
//#define FAN_PIN   4  // Extruder 2 uses the default fan output, so move to an other pin
//#define EXTERNALSERIAL  use Arduino serial library instead of build in. Requires more ram, has only 63 byte input buffer.

// Uncomment the following line if you are using arduino compatible firmware made for Arduino version earlier then 1.0
// If it is incompatible you will get compiler errors about write functions not beeing compatible!
//#define COMPAT_PRE1

/* Define the type of axis movements needed for your printer. The typical case
is a full cartesian system where x, y and z moves are handled by separate motors.

0 = full cartesian system, xyz have seperate motors.
1 = z axis + xy H-gantry (x_motor = x+y, y_motor = x-y)
2 = z axis + xy H-gantry (x_motor = x+y, y_motor = y-x)
3 = Delta printers (Rostock, Kossel, RostockMax, Cerberus, etc)
4 = Tuga printer (Scott-Russell mechanism)
5 = Bipod system (not implemented)
Cases 1 and 2 cover all needed xy H gantry systems. If you get results mirrored etc. you can swap motor connections for x and y.
If a motor turns in the wrong direction change INVERT_X_DIR or INVERT_Y_DIR.
*/
#define DRIVE_SYSTEM 3

// ##########################################################################################
// ##                               Calibration                                            ##
// ##########################################################################################

/** Drive settings for the Delta printers
*/
#if DRIVE_SYSTEM==3
    // ***************************************************
    // *** These parameter are only for Delta printers ***
    // ***************************************************

/** \brief Delta drive type: 0 - belts and pulleys, 1 - filament drive */
#define DELTA_DRIVE_TYPE 0

#if DELTA_DRIVE_TYPE == 0
/** \brief Pitch in mm of drive belt. GT2 = 2mm */
#define BELT_PITCH 2
/** \brief Number of teeth on X, Y and Z tower pulleys */
#define PULLEY_TEETH 20
#define PULLEY_CIRCUMFERENCE (BELT_PITCH * PULLEY_TEETH)
#elif DELTA_DRIVE_TYPE == 1
/** \brief Filament pulley diameter in milimeters */
#define PULLEY_DIAMETER 10
#define PULLEY_CIRCUMFERENCE (PULLEY_DIAMETER * 3.1415927)
#endif

/** \brief Steps per rotation of stepper motor */
#define STEPS_PER_ROTATION 200

/** \brief Micro stepping rate of X, Y and Y tower stepper drivers */
#define MICRO_STEPS 16

// Calculations
#define AXIS_STEPS_PER_MM ((float)(MICRO_STEPS * STEPS_PER_ROTATION) / PULLEY_CIRCUMFERENCE)
#define XAXIS_STEPS_PER_MM AXIS_STEPS_PER_MM
#define YAXIS_STEPS_PER_MM AXIS_STEPS_PER_MM
#define ZAXIS_STEPS_PER_MM AXIS_STEPS_PER_MM
#else
// *******************************************************
// *** These parameter are for all other printer types ***
// *******************************************************

/** Drive settings for printers with cartesian drive systems */
/** \brief Number of steps for a 1mm move in x direction.
For xy gantry use 2*belt moved!
Overridden if EEPROM activated. */
#define XAXIS_STEPS_PER_MM 98.425196
/** \brief Number of steps for a 1mm move in y direction.
For xy gantry use 2*belt moved!
Overridden if EEPROM activated.*/
#define YAXIS_STEPS_PER_MM 98.425196
/** \brief Number of steps for a 1mm move in z direction  Overridden if EEPROM activated.*/
#define ZAXIS_STEPS_PER_MM 2560
#endif

// ##########################################################################################
// ##                           Extruder configuration                                     ##
// ##########################################################################################

// for each extruder, fan will stay on until extruder temperature is below this value
#define EXTRUDER_FAN_COOL_TEMP 50

#define EXT0_X_OFFSET 0
#define EXT0_Y_OFFSET 0
// for skeinforge 40 and later, steps to pull the plasic 1 mm inside the extruder, not out.  Overridden if EEPROM activated.
#define EXT0_STEPS_PER_MM 92.4 // EZStruder
// What type of sensor is used?
// 1 is 100k thermistor (Epcos B57560G0107F000 - RepRap-Fab.org and many other)
// 2 is 200k thermistor
// 3 is mendel-parts thermistor (EPCOS G550)
// 4 is 10k thermistor
// 8 is ATC Semitec 104GT-2
// 5 is userdefined thermistor table 0
// 6 is userdefined thermistor table 1
// 7 is userdefined thermistor table 2
// 50 is userdefined thermistor table 0 for PTC thermistors
// 51 is userdefined thermistor table 0 for PTC thermistors
// 52 is userdefined thermistor table 0 for PTC thermistors
// 60 is AD8494, AD8495, AD8496 or AD8497 (5mV/degC and 1/4 the price of AD595 but only MSOT_08 package)
// 97 Generic thermistor table 1
// 98 Generic thermistor table 2
// 99 Generic thermistor table 3
// 100 is AD595
// 101 is MAX6675
// 102 is MAX31855
#define EXT0_TEMPSENSOR_TYPE 97
// Analog input pin for reading temperatures or pin enabling SS for MAX6675
#define EXT0_TEMPSENSOR_PIN TEMP_0_PIN
// Which pin enables the heater
#define EXT0_HEATER_PIN HEATER_0_PIN
#define EXT0_STEP_PIN E0_STEP_PIN
#define EXT0_DIR_PIN E0_DIR_PIN
// set to false/true for normal / inverse direction
#define EXT0_INVERSE true
#define EXT0_ENABLE_PIN E0_ENABLE_PIN
// For Inverting Stepper Enable Pins (Active Low) use 0, Non Inverting (Active High) use 1
#define EXT0_ENABLE_ON false
// The following speed settings are for skeinforge 40+ where e is the
// length of filament pulled inside the heater. For repsnap or older
// skeinforge use higher values.
//  Overridden if EEPROM activated.
#define EXT0_MAX_FEEDRATE 100
// Feedrate from halted extruder in mm/s
//  Overridden if EEPROM activated.
#define EXT0_MAX_START_FEEDRATE 45
// Acceleration in mm/s^2
//  Overridden if EEPROM activated.
#define EXT0_MAX_ACCELERATION 6500
/** Type of heat manager for this extruder.
- 0 = Simply switch on/off if temperature is reached. Works always.
- 1 = PID Temperature control. Is better but needs good PID values. Defaults are a good start for most extruder.
- 3 = Dead-time control. PID_P becomes dead-time in seconds.
 Overridden if EEPROM activated.
*/
#define EXT0_HEAT_MANAGER 1
/** Wait x seconds, after reaching target temperature. Only used for M109.  Overridden if EEPROM activated. */
#define EXT0_WATCHPERIOD 3

/** \brief The maximum value, I-gain can contribute to the output.

A good value is slightly higher then the output needed for your temperature.
Values for starts:
130 => PLA for temperatures from 170-180 deg C
180 => ABS for temperatures around 240 deg C

The precise values may differ for different nozzle/resistor combination.
 Overridden if EEPROM activated.
*/
#define EXT0_PID_INTEGRAL_DRIVE_MAX 205
/** \brief lower value for integral part

The I state should converge to the exact heater output needed for the target temperature.
To prevent a long deviation from the target zone, this value limits the lower value.
A good start is 30 lower then the optimal value. You need to leave room for cooling.
 Overridden if EEPROM activated.
*/
#define EXT0_PID_INTEGRAL_DRIVE_MIN 60
/** P-gain.  Overridden if EEPROM activated. */
#define EXT0_PID_P   31.36
/** I-gain. Overridden if EEPROM activated.
*/
#define EXT0_PID_I   2.18
/** Dgain.  Overridden if EEPROM activated.*/
#define EXT0_PID_D 112.90
// maximum time the heater is can be switched on. Max = 255.  Overridden if EEPROM activated.
#define EXT0_PID_MAX 255
/** \brief Faktor for the advance algorithm. 0 disables the algorithm.  Overridden if EEPROM activated.
K is the factor for the quadratic term, which is normally disabled in newer versions. If you want to use
the quadratic factor make sure ENABLE_QUADRATIC_ADVANCE is defined.
L is the linear factor and seems to be working better then the quadratic dependency.
*/
#define EXT0_ADVANCE_K 0.0f
#define EXT0_ADVANCE_L 0.0f
/* Motor steps to remove backlash for advance alorithm. These are the steps
needed to move the motor cog in reverse direction until it hits the driving
cog. Direct drive extruder need 0. */
#define EXT0_ADVANCE_BACKLASH_STEPS 0
/** \brief Temperature to retract filament when extruder is heating up. Overridden if EEPROM activated.
*/
#define EXT0_WAIT_RETRACT_TEMP 		150
/** \brief Units (mm/inches) to retract filament when extruder is heating up. Overridden if EEPROM activated. Set
to 0 to disable.
*/
#define EXT0_WAIT_RETRACT_UNITS 	0

/** You can run any gcode command on extruder deselect/select. Seperate multiple commands with a new line \n.
That way you can execute some mechanical components needed for extruder selection or retract filament or whatever you need.
The codes are only executed for multiple extruder when changing the extruder. */
#define EXT0_SELECT_COMMANDS "M117 Extruder 1"
#define EXT0_DESELECT_COMMANDS ""
/** The extruder cooler is a fan to cool the extruder when it is heating. If you turn the etxruder on, the fan goes on. */
#define EXT0_EXTRUDER_COOLER_PIN 8
/** PWM speed for the cooler fan. 0=off 255=full speed */
#define EXT0_EXTRUDER_COOLER_SPEED 255


// =========================== Configuration for second extruder ========================
#define EXT1_X_OFFSET 10
#define EXT1_Y_OFFSET 0
// for skeinforge 40 and later, steps to pull the plasic 1 mm inside the extruder, not out.  Overridden if EEPROM activated.
#define EXT1_STEPS_PER_MM 92.4
// What type of sensor is used?
// 1 is 100k thermistor (Epcos B57560G0107F000 - RepRap-Fab.org and many other)
// 2 is 200k thermistor
// 3 is mendel-parts thermistor (EPCOS G550)
// 4 is 10k thermistor
// 5 is userdefined thermistor table 0
// 6 is userdefined thermistor table 1
// 7 is userdefined thermistor table 2
// 8 is ATC Semitec 104GT-2
// 50 is userdefined thermistor table 0 for PTC thermistors
// 51 is userdefined thermistor table 0 for PTC thermistors
// 52 is userdefined thermistor table 0 for PTC thermistors
// 60 is AD8494, AD8495, AD8496 or AD8497 (5mV/degC and 1/4 the price of AD595 but only MSOT_08 package)
// 97 Generic thermistor table 1
// 98 Generic thermistor table 2
// 99 Generic thermistor table 3
// 100 is AD595
// 101 is MAX6675
#define EXT1_TEMPSENSOR_TYPE 97
// Analog input pin for reading temperatures or pin enabling SS for MAX6675
#define EXT1_TEMPSENSOR_PIN TEMP_2_PIN
// Which pin enables the heater
#define EXT1_HEATER_PIN HEATER_2_PIN
#define EXT1_STEP_PIN E1_STEP_PIN
#define EXT1_DIR_PIN E1_DIR_PIN
// set to 0/1 for normal / inverse direction
#define EXT1_INVERSE true
#define EXT1_ENABLE_PIN E1_ENABLE_PIN
// For Inverting Stepper Enable Pins (Active Low) use 0, Non Inverting (Active High) use 1
#define EXT1_ENABLE_ON false
// The following speed settings are for skeinforge 40+ where e is the
// length of filament pulled inside the heater. For repsnap or older
// skeinforge use heigher values.
//  Overridden if EEPROM activated.
#define EXT1_MAX_FEEDRATE 100
// Feedrate from halted extruder in mm/s
//  Overridden if EEPROM activated.
#define EXT1_MAX_START_FEEDRATE 45
// Acceleration in mm/s^2
//  Overridden if EEPROM activated.
#define EXT1_MAX_ACCELERATION 6500
/** Type of heat manager for this extruder.
- 0 = Simply switch on/off if temperature is reached. Works always.
- 1 = PID Temperature control. Is better but needs good PID values. Defaults are a good start for most extruder.
 Overridden if EEPROM activated.
*/
#define EXT1_HEAT_MANAGER 1
/** Wait x seconds, after reaching target temperature. Only used for M109.  Overridden if EEPROM activated. */
#define EXT1_WATCHPERIOD 1

/** \brief The maximum value, I-gain can contribute to the output.

A good value is slightly higher then the output needed for your temperature.
Values for starts:
130 => PLA for temperatures from 170-180 deg C
180 => ABS for temperatures around 240 deg C

The precise values may differ for different nozzle/resistor combination.
 Overridden if EEPROM activated.
*/
#define EXT1_PID_INTEGRAL_DRIVE_MAX 205
/** \brief lower value for integral part

The I state should converge to the exact heater output needed for the target temperature.
To prevent a long deviation from the target zone, this value limits the lower value.
A good start is 30 lower then the optimal value. You need to leave room for cooling.
 Overridden if EEPROM activated.
*/
#define EXT1_PID_INTEGRAL_DRIVE_MIN 60
/** P-gain.  Overridden if EEPROM activated. */
#define EXT1_PID_P   31.36
/** I-gain.  Overridden if EEPROM activated.
*/
#define EXT1_PID_I   2.38
/** D-gain.  Overridden if EEPROM activated.*/
#define EXT1_PID_D 112.9
// maximum time the heater is can be switched on. Max = 255.  Overridden if EEPROM activated.
#define EXT1_PID_MAX 255
/** \brief Faktor for the advance algorithm. 0 disables the algorithm.  Overridden if EEPROM activated.
K is the factor for the quadratic term, which is normally disabled in newer versions. If you want to use
the quadratic factor make sure ENABLE_QUADRATIC_ADVANCE is defined.
L is the linear factor and seems to be working better then the quadratic dependency.
*/
#define EXT1_ADVANCE_K 0.0f
#define EXT1_ADVANCE_L 0.0f
/* Motor steps to remove backlash for advance alorithm. These are the steps
needed to move the motor cog in reverse direction until it hits the driving
cog. Direct drive extruder need 0. */
#define EXT1_ADVANCE_BACKLASH_STEPS 0

#define EXT1_WAIT_RETRACT_TEMP 	150
#define EXT1_WAIT_RETRACT_UNITS	0
#define EXT1_SELECT_COMMANDS "M117 Extruder 2"
#define EXT1_DESELECT_COMMANDS ""
/** The extruder cooler is a fan to cool the extruder when it is heating. If you turn the etxruder on, the fan goes on. */
#define EXT1_EXTRUDER_COOLER_PIN -1
/** PWM speed for the cooler fan. 0=off 255=full speed */
#define EXT1_EXTRUDER_COOLER_SPEED 255

/** If enabled you can select the distance your filament gets retracted during a
M140 command, after a given temperature is reached. */
#define RETRACT_DURING_HEATUP true

pins.h

Code: Select all

#define HEATER_BED_PIN 3
#define TEMP_BED_PIN   2

#define HEATER_0_PIN   9
#define TEMP_0_PIN     0

#define HEATER_1_PIN   3
#define TEMP_1_PIN     2

#define HEATER_2_PIN   7
#define TEMP_2_PIN     1

note in the configuration.h i changed

Code: Select all

#define EXT0_EXTRUDER_COOLER_PIN 8

from default 7 -> 8 because it was stopping extuder 2 from heating.. heater_2_pin was also 7 so i think there is a conflict.

make sure the drive is enabled in configure.h also

Code: Select all

#define MOTOR_CURRENT {175,175,175,200,200} 

then i connected RH and setup the printer with 2 extruders, and updated the eeprom and made both extruders the same.

now i can control them all

[mhackney]

I got most of my work done so I played around with the printer a bit more. I hooked the cabling to Hot End 1 to the Hot End 0 output to see if the wiring is an issue. Nope, the hot end heated up just fine in single extruder configuration.

So:

I know my wiring to both hot ends and thermistors is fine since each works just fine when connected to hot end 0 terminals on Rambo.

And, I also reconfigured repetier to tell it to use TEMP_1_PIN and HEATER_1_PIN for extruder 0. This is the cross test as they say. And it works fine.

Therefore, I CAN run either hot end in single extruder mode from HEATER_0_PIN and TEMP_0_PIN (Extruder 0 heat terminal on RAMBo) or I CAN run either hot end from HEATER_1_PIN and TEMP_1_PIN (Extruder 1 heat terminal on RAMBo) but I CAN NOT run with repeater configured for 2 hot ends/extruders. A head scratcher. This is the .91 release. I am going to try the newest .91.7 release I grabbed this morning.

[bubbasnow]

mine was a fresh pull from the seemecnc git. it looks like the .91.7 has changed some var names in pins.h i dont know if that will help/hurt

[mhackney]

I did a quick copy paste and now getting upload timeouts. Went back to original and also get timeouts

I see your heater 1 and 2 pins are different than mine but your wiring hookups is the same.

Going to sister in laws for dinner so I ran out of time. Will try again later.

[mhackney]

Hmm. Why would the bed heater and thermistor be the same as heater 1? That doesn't make sense!

[bubbasnow]

Hmm. Why would the bed heater and thermistor be the same as heater 1? That doesn't make sense!

i think the UM rambo labeling and the RFW labeling arent exactly the same, what tipped me off was during the configuration tool... i about had a brain aneurysm

[mhackney]

In looking again, I have heater and thermistor 1 configured to pins 7 and 1 so that is the same. Where do you have yor fan hooked up to use pin 8?

[bubbasnow]

In looking again, I have heater and thermistor 1 configured to pins 7 and 1 so that is the same. Where do you have yor fan hooked up to use pin 8?

my peek fans i have wired to 12v directly, layer fan will go on fan0 because that is the one kisslicer will control with the M commands

[bubbasnow]

tada

[img]https://lh3.googleusercontent.com/-2-Qx ... 235730.jpg[/img]

kiss is having a tough time with slicing this, it doesnt pause to heat up the extruder when there is a change... maybe i dont have it configured right.

it looks like ill have to go back to slicer if i cannot get this to work. ;((((((((

[mhackney]

Ok, I now have two operational extruders and hot ends. All it took was a blown fuse on RAMBo, a blown cartridge heater, several new gray hairs and a few hours of wasted time scratching my head.

I suspect there was a chain of events that started with a bad or blown heater cartridge on my second hot end. That may have occurred when the fuse blew or it blew the fuse. In any event, I was able to isolate it. Luckily I have 15 of these things that I bought last year cheap! A bit of soldering and my configuration worked just fine. Now to dial it in.

[bubbasnow]

Ok, I now have two operational extruders and hot ends. All it took was a blown fuse on RAMBo, a blown cartridge heater, several new gray hairs and a few hours of wasted time scratching my head.

I suspect there was a chain of events that started with a bad or blown heater cartridge on my second hot end. That may have occurred when the fuse blew or it blew the fuse. In any event, I was able to isolate it. Luckily I have 15 of these things that I bought last year cheap! A bit of soldering and my configuration worked just fine. Now to dial it in.

sweet cause i need some help with kisslicer...or should i just change back to slic3r?

[mhackney]

KISS has pretty rudimentary dual extruder capability. It lets you use the 2nd extruder for the object, support and raft and that's about it. Slic3r lets you do a little more but I'm struggling with 1) getting first layer to stick (I always have this problem with Slic3r) and 2) getting it to honor/recognize my 2 extruder configuration.

[bubbasnow]

i am having trouble with the temps of the off extruder, kiss wont wait for it to heat up and just tries to extrude with a cold...hot...end. am i missing some pre/post/extruder gcodes?

[mhackney]

On the Material tab, try setting the Keep-Warm temperature to the same as the Main temperature.