Z-axis moves correctly, but prints come out at half height October 04, 2014 01:13AM |
Registered: 9 years ago Posts: 17 |
Re: Z-axis moves correctly, but prints come out at half height October 04, 2014 05:21AM |
Registered: 9 years ago Posts: 125 |
Re: Z-axis moves correctly, but prints come out at half height October 04, 2014 09:33AM |
Registered: 10 years ago Posts: 14,672 |
Re: Z-axis moves correctly, but prints come out at half height October 04, 2014 10:50AM |
Registered: 10 years ago Posts: 167 |
Re: Z-axis moves correctly, but prints come out at half height October 04, 2014 12:26PM |
Registered: 11 years ago Posts: 1,320 |
Re: Z-axis moves correctly, but prints come out at half height October 04, 2014 04:33PM |
Registered: 9 years ago Posts: 17 |
Quote
dc42
Try the following:
1. Place the nozzle just touching the bed. Send G91 to put the printer into relative positioning mode. Send G1 Z10 and measure how far the Z axis rises. It should be 10mm.
2. Place the nozzle just touching the bed. Send G91 to put the printer into relative positioning mode. Send G1 Z0.33 to the printer 30 times and measure how far the Z axis rises, It should also be 10mm.
Instead of sending G1 Z3.33 to the printer manually 60 times, you could put G1 Z0.33 and G4 0.1 commands alternately in a file, with 30 of each, and 'print' that file. Don't just put 30 of the G1 Z0.33 commands in a file with no intervening G4 commands, because the lookahead code may cause them to be merged into a single movement.
If (1) doesn't give you a 10mm rise in Z, then your Z axis is not calibrated properly, or you have a serious issue with missing steps.
If (1) gives you 10mm but (2) does not, then try reducing the maximum Z speed, the Z acceleration, or the Z jerk amount; or increase the Z stepper motor current.
Re: Z-axis moves correctly, but prints come out at half height October 04, 2014 04:37PM |
Registered: 9 years ago Posts: 17 |
Quote
jbernardis
If it moves correctly using the manual buttons, but doesn't print properly, check your max z speed in your firmware. If this is set too high, the stepper might not be able to keep up with what the arduino/RAMPS is asking it to do.
Re: Z-axis moves correctly, but prints come out at half height October 04, 2014 04:40PM |
Registered: 9 years ago Posts: 17 |
Quote
AbuMaia
Another possibility is you have 4000 steps per mm for the Z axis, yet you have your layer height set at 0.32mm. Those numbers might not be playing nicely with each other.
Re: Z-axis moves correctly, but prints come out at half height October 04, 2014 04:40PM |
Registered: 9 years ago Posts: 17 |
Re: Z-axis moves correctly, but prints come out at half height October 04, 2014 04:41PM |
Registered: 9 years ago Posts: 17 |
Re: Z-axis moves correctly, but prints come out at half height October 04, 2014 06:14PM |
Registered: 10 years ago Posts: 14,672 |
Quote
KidAircrash
Quote
dc42
Try the following:
1. Place the nozzle just touching the bed. Send G91 to put the printer into relative positioning mode. Send G1 Z10 and measure how far the Z axis rises. It should be 10mm.
2. Place the nozzle just touching the bed. Send G91 to put the printer into relative positioning mode. Send G1 Z0.33 to the printer 30 times and measure how far the Z axis rises, It should also be 10mm.
Instead of sending G1 Z3.33 to the printer manually 60 times, you could put G1 Z0.33 and G4 0.1 commands alternately in a file, with 30 of each, and 'print' that file. Don't just put 30 of the G1 Z0.33 commands in a file with no intervening G4 commands, because the lookahead code may cause them to be merged into a single movement.
If (1) doesn't give you a 10mm rise in Z, then your Z axis is not calibrated properly, or you have a serious issue with missing steps.
If (1) gives you 10mm but (2) does not, then try reducing the maximum Z speed, the Z acceleration, or the Z jerk amount; or increase the Z stepper motor current.
(1) measures 10mm
I tried (2) by sending G1 Z0.33 to the printer 30 times. It was 10 mm
Re: Z-axis moves correctly, but prints come out at half height October 04, 2014 06:51PM |
Registered: 9 years ago Posts: 17 |
Quote
dc42
Quote
KidAircrash
Quote
dc42
Try the following:
1. Place the nozzle just touching the bed. Send G91 to put the printer into relative positioning mode. Send G1 Z10 and measure how far the Z axis rises. It should be 10mm.
2. Place the nozzle just touching the bed. Send G91 to put the printer into relative positioning mode. Send G1 Z0.33 to the printer 30 times and measure how far the Z axis rises, It should also be 10mm.
Instead of sending G1 Z3.33 to the printer manually 60 times, you could put G1 Z0.33 and G4 0.1 commands alternately in a file, with 30 of each, and 'print' that file. Don't just put 30 of the G1 Z0.33 commands in a file with no intervening G4 commands, because the lookahead code may cause them to be merged into a single movement.
If (1) doesn't give you a 10mm rise in Z, then your Z axis is not calibrated properly, or you have a serious issue with missing steps.
If (1) gives you 10mm but (2) does not, then try reducing the maximum Z speed, the Z acceleration, or the Z jerk amount; or increase the Z stepper motor current.
(1) measures 10mm
I tried (2) by sending G1 Z0.33 to the printer 30 times. It was 10 mm
So it sounds that your Z axis is indeed moving correctly, in layer-size steps as well as large ones. Are you certain that the prints are being completed, rather than stopping when they get to 10mm? You could try printing a cone or pyramid instead of a cube, to check this.
Re: Z-axis moves correctly, but prints come out at half height October 04, 2014 09:00PM |
Registered: 10 years ago Posts: 167 |
Quote
KidAircrash
Quote
AbuMaia
Another possibility is you have 4000 steps per mm for the Z axis, yet you have your layer height set at 0.32mm. Those numbers might not be playing nicely with each other.
What would you recommend I change to? I'm using an e3d v6 hot end similar to you. What are your firmware/slicer settings?
#define DEFAULT_AXIS_STEPS_PER_UNIT {80,80,4000,900} // default steps per unit for ultimaker {78.7402,78.7402,200*8/3,760*1.1}920 #define DEFAULT_MAX_FEEDRATE {250, 250, 2, 22} // (mm/sec) #define DEFAULT_MAX_ACCELERATION {1000,1000,5,1000} // 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 500 // X, Y, Z and E max acceleration in mm/s^2 for printing moves #define DEFAULT_RETRACT_ACCELERATION 500 // X, Y, Z and E max acceleration in mm/s^2 for retracts
Re: Z-axis moves correctly, but prints come out at half height October 05, 2014 04:31AM |
Registered: 9 years ago Posts: 125 |
Re: Z-axis moves correctly, but prints come out at half height October 05, 2014 02:17PM |
Registered: 9 years ago Posts: 17 |
Re: Z-axis moves correctly, but prints come out at half height October 05, 2014 02:18PM |
Registered: 9 years ago Posts: 17 |
Quote
AbuMaia
Quote
KidAircrash
Quote
AbuMaia
Another possibility is you have 4000 steps per mm for the Z axis, yet you have your layer height set at 0.32mm. Those numbers might not be playing nicely with each other.
What would you recommend I change to? I'm using an e3d v6 hot end similar to you. What are your firmware/slicer settings?
I have a 0.4mm nozzle on my e3d, so I have 0.2mm layers set in slic3r. My firmware settings are
#define DEFAULT_AXIS_STEPS_PER_UNIT {80,80,4000,900} // default steps per unit for ultimaker {78.7402,78.7402,200*8/3,760*1.1}920 #define DEFAULT_MAX_FEEDRATE {250, 250, 2, 22} // (mm/sec) #define DEFAULT_MAX_ACCELERATION {1000,1000,5,1000} // 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 500 // X, Y, Z and E max acceleration in mm/s^2 for printing moves #define DEFAULT_RETRACT_ACCELERATION 500 // X, Y, Z and E max acceleration in mm/s^2 for retracts
Re: Z-axis moves correctly, but prints come out at half height October 05, 2014 02:20PM |
Registered: 9 years ago Posts: 17 |
Re: Z-axis moves correctly, but prints come out at half height October 06, 2014 09:44AM |
Registered: 14 years ago Posts: 3,742 |
Re: Z-axis moves correctly, but prints come out at half height October 06, 2014 09:53AM |
Registered: 14 years ago Posts: 3,742 |
// EEPROM // The microcontroller can store settings in the EEPROM, e.g. max velocity... // M500 - stores parameters in EEPROM // M501 - reads parameters from EEPROM (if you need reset them after you changed them temporarily). // M502 - reverts to the default "factory settings". You still need to store them in EEPROM afterwards if you want to. //define this to enable EEPROM support //#define EEPROM_SETTINGS //to disable EEPROM Serial responses and decrease program space by ~1700 byte: comment this out: // please keep turned on if you can. //#define EEPROM_CHITCHAT
Re: Z-axis moves correctly, but prints come out at half height October 07, 2014 12:21AM |
Registered: 9 years ago Posts: 17 |
Re: Z-axis moves correctly, but prints come out at half height October 07, 2014 12:52AM |
Registered: 9 years ago Posts: 17 |
Re: Z-axis moves correctly, but prints come out at half height October 08, 2014 08:23AM |
Registered: 10 years ago Posts: 167 |
Re: Z-axis moves correctly, but prints come out at half height October 08, 2014 09:53PM |
Registered: 9 years ago Posts: 17 |