Setting up Cartesian Printer.

dc42 · 31 Oct 2016, 09:50

You can customise what M0 does by creating a stop.g file. By default it turns all heaters off and sets all motors to idle current (because on some delta printers, turning the motors off may cause the head to drop). M0 must be the last command in the file, because no further commands in the file will be executed.

Corexy · 31 Oct 2016, 10:19

@dc42:

You can customise what M0 does by creating a stop.g file. By default it turns all heaters off and sets all motors to idle current (because on some delta printers, turning the motors off may cause the head to drop). M0 must be the last command in the file, because no further commands in the file will be executed.

I'm happy with the default settings, so:

G90
G1 Z175 F360
G90
G1 X5 Y190 F800
M106 P0 S0
M0

All good?

As well please: If I have an extrusion multiplier of 0.85 set in S3D, should the extrusion setting on my touch panel/DWC say 85% or 100%?

dc42 · 31 Oct 2016, 10:23

Your end gcode looks good if you are happy not turning the motors off completely. You don't need the second G90 command.

DWC and PanelDue know nothing about the extrusion factor that you set in S3D. The one they know about is the extrusion factor set using the M221 command, which defaults to 100%.

Corexy · 31 Oct 2016, 10:28

@dc42:

Your end gcode looks good if you are happy not turning the motors off completely. You don't need the second G90 command.

DWC and PanelDue know nothing about the extrusion factor that you set in S3D. The one they know about is the extrusion factor set using the M221 command, which defaults to 100%.

OK, but for the dummies it is actually printing at the extrusion factor entered in S3D, regardless of it showing 100% on the panel?

That's what I'm assuming, I just want to be sure.

The way you say it here makes it sound like the S3D extrusion factor is overidden by the M221 command??

dc42 · 31 Oct 2016, 11:15

The extrusion factor you set in S3D affects the extrusion amounts in the Gcode that it generates. Those extrusion amounts are then multiplied by the M221 factor when printing. So in effect, the S3D and M221 factors get multiplied together. If you set 100% on the panel, you will get the extrusion factor you asked for in S3D.

deckingman · 31 Oct 2016, 11:17

Yup. Your slicer will apply the extrusion multiplier you set in it to all the extruder gcode moves it makes when you slice the file. So, the gcode file you get from S3D will have had 0.85 applied to all the extruders moves, If you use DWC or Panel Due or M221, it will apply another extrusion multiplier to what has already been applied by your slicer.

Edit Cross post - DC42 and I must have bee typing at the same time.

deckingman · 31 Oct 2016, 11:25

@Corexy:

I'll take my extrusion multiplier results over to Deckingham's post, because I'm getting similar results.

Interesting. Got any pics? I've just started playing around with S3D - nice features but what a ball aching difficult way of doing things!!. One thing I noticed straight away is that when you start from scratch, the default extrusion multiplier is 0.90 and not 1.00. It seems S3D think that 90% is a better starting point….....

Corexy · 1 Nov 2016, 05:03

@deckingman:

@Corexy:

I'll take my extrusion multiplier results over to Deckingham's post, because I'm getting similar results.

Interesting. Got any pics? I've just started playing around with S3D - nice features but what a ball aching difficult way of doing things!!. One thing I noticed straight away is that when you start from scratch, the default extrusion multiplier is 0.90 and not 1.00. It seems S3D think that 90% is a better starting point….....

Yes I am taking pics.

I am just tired after a big day working, so will have a shower and a rest then have a look at uploading pics.

If not tonight (Oz time), tomorrow when I'm at home for the day.

I think you are looking at default PLA settings, where everything I've done so far has been with ABS, which is definitely set at 1.0 by default.

Corexy · 15 Nov 2016, 11:23

Haven't had time to play with this recently.

Just not convinced that my extrusion multiplier is the issue here….

Even right back up at 100% with signs of over extrusion, I'm getting under extrusion in the very start of a layer, then it fills out nicely. Seems to do it across a range of extrusion multiplier settings.

I'm beginning to wonder if the current setting, speed, acceleration or jerk settings of the extruder stepper are the issue, slowing down the speed of the extrusion in the start of each layer.

Extruder steps/mm feedrate have been checked over and over.

This one was pretty much S3D's default ABS profile, set up for printing on a raft, at 100% extrusion and standard default speeds.

Looks like some retraction tweaking would be in order (1mm/30mm per sec as standard at the moment), but I'd really like to why I'm getting this bit of thin surface in the start of each layer.

You can see a bit in the roof of the benchy.

Any suggestions?

I'll put up my drive config codes in a moment.

Corexy · 15 Nov 2016, 11:26

Here's what I'm set at in config:

; Drives
M569 P0 S1 ; Drive 0 goes forwards
M569 P1 S1 ; Drive 1 goes forwards
M569 P2 S0 ; Drive 2 goes backwards
M569 P3 S0 ; Drive 3 goes backwards
M350 X16 Y16 Z16 E16 I1 ; Configure microstepping without interpolation
M92 X80 Y80 Z800 E121 ; Set steps per mm
M566 X600 Y600 Z12 E60 ; Set maximum instantaneous speed changes (mm/min)
M203 X12000 Y12000 Z360 E3000 ; Set maximum speeds (mm/min)
M201 X1000 Y1000 Z20 E1000 ; Set accelerations (mm/s^2)
M906 X800 Y800 Z800 E600 I30 ; Set motor currents (mA) and motor idle factor in per cent
M84 S30 ; Set idle timeout

T3P3Tony · 15 Nov 2016, 12:58

Your settings don't ring any alarm bells. Have you confirmed the the extruder is definitely not skipping some steps when it is accelerating at the beginning of a move?

If you slice a simple model with a lot of direction changes and retractions then you can see if what I'd asked for over (say) 10 layers is what was extruded by measuring the filament.

dc42 · 15 Nov 2016, 17:37

It looks to me that you have severe under extrusion on the first layer, and slight under extrusion on top solid infill layers. This suggests to me that you are starting the first layer too high.

Corexy · 16 Nov 2016, 04:48

@T3P3Tony:

Your settings don't ring any alarm bells. Have you confirmed the the extruder is definitely not skipping some steps when it is accelerating at the beginning of a move?

If you slice a simple model with a lot of direction changes and retractions then you can see if what I'd asked for over (say) 10 layers is what was extruded by measuring the filament.

How do I confirm if the extruder is skipping steps at the beginning of a move? How do I know how much I should be measuring?

If it was skipping, would I turn up the current from say 600mA to 800mA?

Corexy · 16 Nov 2016, 04:50

@dc42:

It looks to me that you have severe under extrusion on the first layer, and slight under extrusion on top solid infill layers. This suggests to me that you are starting the first layer too high.

I'm using S3D and my "First Layer Settings" are Height 90%/Width 100%/Speed 50%.

I should point out that I'm printing with a raft.

This was the default ABS setting, do you suggest any changes to that?