Z-ax don't make enough steps, help in Firmware Marlin

Hallo All,

I need some help again

If i put the calculations in the firmware but the Z ax just move a littel bit. I check the pololu's but are ok, and don't lose steps.

I'm bussy to calculate the steps of my Mendel. I use the online calculator of josefprusa V2

My X and Y motors are driven by pololu 1/16 driver, have a 13 tooth pully and drive a T5 timing belt so the calculator say: 49.23076923076923 steps
My Z motor are driven by pololu 1/16 driver, have a 13 tooth pully that drive a 21 tooth pully with T5 belt, the 21 tooth pully is conected to a M8-metric.
So for the Z ax i calculate: 1584.7619047619048 steps
My extruder i didn't calculate yet: it is a Greg's Wade Universal Accessible Extruder: little pully have 9 tooth and the big one have 47 tooth ( maby some body now the best steps )

//===========================================================================
//=============================Mechanical Settings===========================
//===========================================================================

// corse Endstop Settings
//#define ENDSTOPPULLUPS // Comment this out (using // at the start of the line) to disable the endstop pullup resistors

#ifndef ENDSTOPPULLUPS
// fine Enstop settings: Individual Pullups. will be ignord if ENDSTOPPULLUPS is defined
#define ENDSTOPPULLUP_XMAX
#define ENDSTOPPULLUP_YMAX
#define ENDSTOPPULLUP_ZMAX
#define ENDSTOPPULLUP_XMIN
#define ENDSTOPPULLUP_YMIN
#define ENDSTOPPULLUP_ZMIN
#endif

#ifdef ENDSTOPPULLUPS
#define ENDSTOPPULLUP_XMAX
#define ENDSTOPPULLUP_YMAX
#define ENDSTOPPULLUP_ZMAX
#define ENDSTOPPULLUP_XMIN
#define ENDSTOPPULLUP_YMIN
#define ENDSTOPPULLUP_ZMIN
#endif

// The pullups are needed if you directly connect a mechanical endswitch between the signal and ground pins.
const bool X_ENDSTOPS_INVERTING = true; // OK set to true to invert the logic of the endstops.
const bool Y_ENDSTOPS_INVERTING = true; // OK set to true to invert the logic of the endstops.
const bool Z_ENDSTOPS_INVERTING = true; // OK set to true to invert the logic of the endstops.
//#define DISABLE_MAX_ENDSTOPS

// For Inverting Stepper Enable Pins (Active Low) use 0, Non Inverting (Active High) use 1
#define X_ENABLE_ON 0
#define Y_ENABLE_ON 0
#define Z_ENABLE_ON 0
#define E_ENABLE_ON 0 // For all extruders

// Disables axis when it's not being used.
#define DISABLE_X false
#define DISABLE_Y false
#define DISABLE_Z false
#define DISABLE_E false // For all extruders

#define INVERT_X_DIR true // for Mendel set to false, for Orca set to true
#define INVERT_Y_DIR false // for Mendel set to true, for Orca set to false
#define INVERT_Z_DIR true // for Mendel set to false, for Orca set to true
#define INVERT_E0_DIR true // for direct drive extruder v9 set to true, for geared extruder set to false
#define INVERT_E1_DIR true // for direct drive extruder v9 set to true, for geared extruder set to false
#define INVERT_E2_DIR true // for direct drive extruder v9 set to true, for geared extruder set to false

// ENDSTOP SETTINGS:
// Sets direction of endstops when homing; 1=MAX, -1=MIN
#define X_HOME_DIR -1
#define Y_HOME_DIR -1
#define Z_HOME_DIR -1

#define min_software_endstops false // aak If true, axis won't move to coordinates less than HOME_POS.
#define max_software_endstops true //If true, axis won't move to coordinates greater than the defined lengths below.
#define X_MAX_LENGTH 130
#define Y_MAX_LENGTH 130
#define Z_MAX_LENGTH 80

// The position of the homing switches. Use MAX_LENGTH * -0.5 if the center should be 0, 0, 0
#define X_HOME_POS 0
#define Y_HOME_POS 0
#define Z_HOME_POS 0

//// MOVEMENT SETTINGS
#define NUM_AXIS 4 // The axis order in all axis related arrays is X, Y, Z, E
#define HOMING_FEEDRATE {500, 500, 400, 0} // set the homing speeds (mm/min)

// default settings

#define DEFAULT_AXIS_STEPS_PER_UNIT {49.23076923076923,49.23076923076923,1584.7619047619048,760*1.1} //voor Z=1584.7619047619048 en voor X en Y=49.23076923076923 org. 78.7402,78.7402,200*8/3,760*1.1 default steps per unit for ultimaker
#define DEFAULT_MAX_FEEDRATE {40, 40, 5, 45} // (mm/sec)
#define DEFAULT_MAX_ACCELERATION {40, 40, 400,1000} // X, Y, Z, E maximum start speed for accelerated moves. E default values are good for skeinforge 40+, for older versions raise them a lot.

#define DEFAULT_ACCELERATION 40 // X, Y, Z and E max acceleration in mm/s^2 for printing moves
#define DEFAULT_RETRACT_ACCELERATION 40 // X, Y, Z and E max acceleration in mm/s^2 for r retracts

//
#define DEFAULT_XYJERK 20.0 // (mm/sec)
#define DEFAULT_ZJERK 0.4 // (mm/sec)
#define DEFAULT_EJERK 5.0 // (mm/sec)

I don't now how to solve this problim

Have some body a clu what i doing wrong?

Thanks all

---

First Gen Mendel made by Adrian Bowyer
Controller: RAMPS 1.4
Extruder: Greg's Wade Universal Accessible Extruder
Firmware :Marlin
----------------
MendelMax extra groot
RAMPS 1.4 grafisch display (diy)
Marlin
E3D v6
220V hotbed (diy)

Lang niks in 3Dprinting gedaan, begin nu weer hobby op te pakken.
Weer begonnen met:

Prusa Graber i3 "wood"
RAMPS 1.4 (mks tft28 v1.2 smart touch)
Marlin
E3D extruder v6 lite

Quote

My Z motor are driven by pololu 1/16 driver, have a 13 tooth pully that drive a 21 tooth pully with T5 belt, the 21 tooth pully is conected to a M8-metric.
So for the Z ax i calculate: 1584.7619047619048 steps

My calculation says: 200 steps/turn * 16 (microstepping) / 1.25 mm/turn * 21 / 13 = 4135 steps/mm (and forget everything beyond 4 digits)

In any case: if your calculation doesn't match reality, reality wins . That means, if you command 100 mm and the axis moves 50 mm only, double the steps/mm, regardless of what your pocket calculator says.

Another note: 4000 steps/mm is pretty high, this will limit the axis' speed to about 100mm/min, because ATmega's processing power is sufficient for some 10'000 to 20'000 steps/second only, depending on firmware and ATmega clock crystal (16 or 20 MHz). 4000 steps/mm is also pointless in regard to achievable mechanical precision, so reducing this to at least 1/8 microstepping, if not 1/2 microstepping seem to be a good idea.

---

Generation 7 Electronics	Teacup Firmware	RepRap DIY

Thanks Traumflug.

I'm not home this weekeind, but monday i will try your input.
I will set the pololu's to 1/4 step
I will say if its work.

Thanks

---

First Gen Mendel made by Adrian Bowyer
Controller: RAMPS 1.4
Extruder: Greg's Wade Universal Accessible Extruder
Firmware :Marlin
----------------
MendelMax extra groot
RAMPS 1.4 grafisch display (diy)
Marlin
E3D v6
220V hotbed (diy)

Lang niks in 3Dprinting gedaan, begin nu weer hobby op te pakken.
Weer begonnen met:

Prusa Graber i3 "wood"
RAMPS 1.4 (mks tft28 v1.2 smart touch)
Marlin
E3D extruder v6 lite

Hoi Traumflug and all other people,

Well i put the pololu,s to 1/4 steps and it works the Z-ax move better, more up.
But now if i want to print something like a cubis 10X10X10mm, the printer make a cubis like 40X40X40mm.
So my logica says that i have to lower te steps, first the steps i caculate was 30 steps. So i lower the steps by the half. So i put the steps to 15.
I up loade the firmware, and nothing chance the printer make a cubis of 40X40X40mm.

Its like that the firmware don't look to the :

#define NUM_AXIS 4 // The axis order in all axis related arrays is X, Y, Z, E
#define HOMING_FEEDRATE {500, 500, 400, 0} // set the homing speeds (mm/min)

// default settings

#define DEFAULT_AXIS_STEPS_PER_UNIT {30,30,1033,760*1.1} //78.7402,78.7402,200*8/3,760*1.1 default steps per unit for ultimaker
#define DEFAULT_MAX_FEEDRATE {40, 40, 5, 45} // (mm/sec)
#define DEFAULT_MAX_ACCELERATION {40, 40, 400,1000} // X, Y, Z, E maximum start speed for accelerated moves. E default values are good for skeinforge 40+, for older versions raise them a lot.

#define DEFAULT_ACCELERATION 40 // X, Y, Z and E max acceleration in mm/s^2 for printing moves
#define DEFAULT_RETRACT_ACCELERATION 40 // X, Y, Z and E max acceleration in mm/s^2 for r retracts

For the arduino i upload blink a led, that go OK, afther i upload the firmware again ( i did this to look that the upload go good).

Do you now what i doing wrong now

Gr aldrik

---

First Gen Mendel made by Adrian Bowyer
Controller: RAMPS 1.4
Extruder: Greg's Wade Universal Accessible Extruder
Firmware :Marlin
----------------
MendelMax extra groot
RAMPS 1.4 grafisch display (diy)
Marlin
E3D v6
220V hotbed (diy)

Lang niks in 3Dprinting gedaan, begin nu weer hobby op te pakken.
Weer begonnen met:

Prusa Graber i3 "wood"
RAMPS 1.4 (mks tft28 v1.2 smart touch)
Marlin
E3D extruder v6 lite

Quote

I up loade the firmware, and nothing chance the printer make a cubis of 40X40X40mm.

Either you upload didn't work as expected or Marlin prefers settings in EEPROM over these freshly uploaded. Look at M92: [reprap.org] (this should work without re-uploading the firmware).

---

Generation 7 Electronics	Teacup Firmware	RepRap DIY

Thanks Traumflug,

It is the EEPROM.
And the M92 .... Is a useful tip, thanks for that too

I'm now bussy to calebereren of the printer, the cubis now more to 10X10X10mm but not perfect.
You help my to a good direcktion

Thanks you ferry muts

Gr Aldrik

---

First Gen Mendel made by Adrian Bowyer
Controller: RAMPS 1.4
Extruder: Greg's Wade Universal Accessible Extruder
Firmware :Marlin
----------------
MendelMax extra groot
RAMPS 1.4 grafisch display (diy)
Marlin
E3D v6
220V hotbed (diy)

Lang niks in 3Dprinting gedaan, begin nu weer hobby op te pakken.
Weer begonnen met:

Prusa Graber i3 "wood"
RAMPS 1.4 (mks tft28 v1.2 smart touch)
Marlin
E3D extruder v6 lite