Setting up Cartesian Printer.

Corexy · 30 Oct 2016, 09:44

Personally, not terribly keen on any of them. Just for the hell of it, try dropping the extrusion in 5% increments until you get obvious under extrusion and see how the finish looks. This is the subject of another thread I've started but for some as yet unexplained reason, I'm getting best results using 70% extrusion with everything calibrated and triple checked. (Yeh, weird I know).

So these are all over extruded?? Definitely don't want to go higher than 100%?

Funnily enough the ABS setting was definitely under extruded at 90%

I probably was going a bit soft on the increments at 2% change per time, I'll try it a 5% changes.

Your end of print script worked nicely by the way, cheers for that.

deckingman · 30 Oct 2016, 09:51

It may be OK - just try what I suggested for the hell of it - it worked for me but nobody has as yet come up with an explanation as to why I need to run like this..

deckingman · 30 Oct 2016, 12:16

For info, here is what I get https://drive.google.com/drive/folders/0B_MwtHtQR_ZveVpCazlzbjRsQlk?usp=sharing with extrusion at 70%.

Corexy · 31 Oct 2016, 07:31

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

Regarding ending script, this is working well for me, bearing in mind I home all axis' in the start script:

G90
G1 Z175 F360
G90
G1 X5 Y190 F800
M104 S0 ; turn off extruder
M140 S0 ; turn off bed
M84 ; disable motors

I'd just like to shut down the print fans on completion as they're pretty noisy.

The heat break fan shut's down when the extruder temp drops below 45 degC, and I'd like to keep it that way.

Could someone please help me out with a line of script to add to that that will shut down the slicer controlled print fan?

**I've gone with "M106 P0 S0 ; turn off print fans", please correct me if I'm wrong.

dc42 · 31 Oct 2016, 08:01

M106 P0 S0 is correct.

Most people use M0 to end the print.

Corexy · 31 Oct 2016, 08:24

@dc42:

M106 P0 S0 is correct.

Most people use M0 to end the print.

I think that was mentioned above….would that shut down my heat break fan as well?

I'd like to leave that running until it all cooled down as I have a teflon insert in my hot end and I'd just rather see it turn off once the temp was down to 45.

dc42 · 31 Oct 2016, 08:40

M0 will not shut down any fans.

deckingman · 31 Oct 2016, 09:20

Just to clarify, as David has said, M0 will not turn off any fans (nor will it turn the motors off). AFAIK, all it does it turn off any heaters so you could use it to instead of the M104 and M140 commands in your end G code. So, yes you still need M106 P0 S0 to turn off the print cooling fan. There is a caveat to that - it assumes that P0 is your print cooling fan as defined in your config.g (it usually is). Also, the hot end fan is usually P1. It's a good idea to keep that running in thermostatic mode as you are doing and not turn the machine off until it stops. Not only because of the teflon insert but also because if you turn it off too soon, you could get heat creep back up the heat sink which will soften the plastic. That will then solidify and cause a blockage the next time you try to use the machine. This is the voice of personal experience:)

BTW Just be aware the using M84 to turn off the motors will mean that the machine will need to be re-homed before another print. Not a problem if you have a homing command (G28) in your start gcode but if not, it'll bite you in the *rse at some time (again the voice of experience:)

Corexy · 31 Oct 2016, 09:40

OK,

So M0 will turn off the motors, bed and extruder heater?

Then I can use my line to turn off my print fan (yes I have it set up as mentioned above, thanks for the heads up)?

And yes I have a home all in the start code, thanks again.

So I could just have:

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

And that would be all proper job?

By the way…

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, 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.