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If #2 was an option it would be like for like with smoothie, which would be useful for comparison if nothing else.
In scenario #1 If there is pressure in the Bowden then I'd guess it would act in a similar fashion to #3 as the slow zlift allows room for the hot filament to leak out.
by
adavidm
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Delta Machines
You are correct. This is smoothie 'vs' RRF G10/G11.
I need to be clear that I'm not blaming RFF for the the problems I'm having. I just noticed something odd and started prodding at it.
That said, a comparison of the various approaches to retraction would be interesting, as it's such a critical part of tuning print quality.
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adavidm
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Delta Machines
@DC42
Sorry to be a pain. I've been looking at the way Smoothie handles zlift vs RRF. I've not come to any conclusions on which is better, if indeed there is such a thing, but the difference is big enough that I think it warrants a second look.
I've made a quick spreadsheet that I believe recreates how RRF constructs it's zlift parameters in GCodes.cpp. You can see it/play with the variables he
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adavidm
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Delta Machines
Here is the latest:
Cura 2.4.0 on the left. Slic3r Prusa Edition on the right.
I forgot to get a screenshot once again, but Cura 2.4.0 definitely seems to insert those tiny, non-printing moves. I've assumed they are part of the nozzle wipe strategy. For now I'm going to focus on Slic3r because it supports firmware retract, which is much more convenient to tune as it can be done during a print
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adavidm
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Delta Machines
Ha,
That's what I thought initially. I had deliberately swapped to random to let me actually print parts (the ooze was that bad near the layer starts prints were failing. I've since discovered that the bowden tube was seated badly and moving during retracts. Now that's fixed I'm back looking at slicer configs.
I've since printed parts with 'shortest' or whatever the Cura setting is called and I
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adavidm
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Delta Machines
Z-hop is 0.25
I think I've been fighting a couple of issues simultaneously which was making troubleshooting difficult. My current theory is that the bowden seating issue and some as yet undefined misconfiguration of Cura 2.4 were combining to lead me down the garden path.
Now the bowden issue is out of the way I'm going to focus on the slicer side. For reference, this is what I'm getting now:
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adavidm
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Delta Machines
Quotedc42
I've just tried putting a thermocouple probe inside the silicone sock on my Kossel. With the PT100 reading stable at 205C the thermocouple reading settles at 193C, with the probe inserted under the heater and the sock on as much as possible. I had to experiment a lot to get this configuration, because if the sock isn't holding the probe tightly in place then the reading is much lower. I
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adavidm
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Delta Machines
Thanks David, useful insight, as always. Updates below.
Motion Configuration
With the exception of the linear rails my printer is pretty similar to yours so I'd expect similar accel/jerk to be acceptable, especially as my verticals are somewhat shorter than yours. I'll double check my settings and use your settings as a base
Temperature
I'll run that 5mm/s test when I get home.
I've got a the
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adavidm
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Delta Machines
Warning - wall of text ahead
tl;dr I would really appreciate suggestions on troubleshooting an aggravating stringing/oozing issue on a delta printer I've recently (re)built. I suspect the E3D Lite6 or something else in the bowden configuration is set up wrongly.
Hi all,
I've recently come back to 3D printing after a few months off to build a dedicated workshop (to keep on my wife's good side)
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adavidm
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Delta Machines
Does the printer move under manual control or when printing via USB?
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adavidm
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RAMPS Electronics
I'll have to try one of those WiFi SD cards. Are there any problems with accessing the files at the same time as the printer is, or is there some kind of contention mechanism?
I've got the ESP8266 up-and-running on the AZSMZ and it works fine for 'control' traffic when calibrating or testing but I don't think I'd trust it for printing directly. The FlashAir would remove need to swap SD cards bac
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adavidm
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Controllers
QuoteKoenig
Quotejcaz76
Hey Guys!
I am having a bit of a problem calibrating my printer. I have the *G1 Z0 Fxxxx* homed in, but when I input something that would bring the head away from the center of the print bed towards the edge of the bed (such as *G1 X50 Fxxxx*), the head gets closer to the bed as it goes out and scrapes the bed. To simplify, the closer the head is to the edge of the bed, t
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adavidm
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Delta Machines
Have you tried detatching the RAMPS from the Mega and uploading a very simple sketch to the Mega such as Blink:
https://www.arduino.cc/en/Tutorial/Blink
This should upload in seconds and flash the built-in led on and off. This would demonstate that the USB interface is working fine and that the Mega is accepting new firmware.
One other thing to bear in mind is the FTDI driver controversy from
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adavidm
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Delta Machines
you can get 600C RTV silicone cheaply that seems to work quite well. I use it to insulate the heater block on my J-Head and it works just fine.
Aerogel might be a bit exotic for diy printers ;-)
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adavidm
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Delta Machines
It's been a while since I used Marlin but don't you have to have
#define DELTA
in the config somewhere?
when you've got that sorted, what happens when you press Home in Pronterface?
adavidm
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adavidm
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Delta Machines
Quoteskelator
Quoteadavidm
What coordinates are you testing the new hotend height at? If X=0,Y=0 then you will never see a difference. Try at one of the tower probing points instead.
I'm stuck at calibrating the center height which Y=0 X=0 Z=0 I have no problem with with tower probing point
I understand, but changing delta radius will not have any effect on the height at x=0 y=0.
cross-postin
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adavidm
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Repetier
What coordinates are you testing the new hotend height at? If X=0,Y=0 then you will never see a difference. Try at one of the tower probing points instead.
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adavidm
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Repetier
Interesting, I'd not really considered it.
I did a quick mock up, attached and it looks like the board fits, just. Would need to double check cable bend angles, create new adapters for the mount points, etc but it could be another option.
adavidm
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adavidm
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Delta Machines
3DR owner here.
It's a great machine, printed several thousand metres of filament through it now. The only 'major' issue was one of the arms worked its way loose from the effector in the middle of a 5 hour print creating a 3D-printed spaghetti mess. After lashing up the effector with superglue, I printed a replacement and no problems since. The lesson I guess is to print a spare of each critical
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adavidm
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Delta Machines
Setup was very straightforward. I'd taken some time to ensure that the adjoining plastic faces were true before bolting them together, both top and bottom. I did this using a belt sander and a square, but no reason it can't be done by hand.
The holes in the plastic pieces have enough depth to them that the rails and rods naturally run perpendicular to the top and bottom without any real hassle.
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adavidm
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Delta Machines
Hi,
I built my 3DR a few months back.
Here is the BOM I assembled:
I've just noticed that the adapters that I glued onto the carbon rods is missing from the list. I got them from here:
In all honesty, the carbon arms I made, although they look nice, are not really suitable. There is too much flex. This is not RichRap's fault, it was my own design. I think this is one reason that the FS
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adavidm
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Delta Machines
Quotejustcurious
Read the Cura manual and see that for dual extruders you have an option named wipetower and oozeshield that may cause this pattern..:-D
Read the manual, are you mad?!
But, yes, you are correct of course. The option appears to be on by default but isn't triggered unless repetier is configured for multiple extruders. I'd forgotten that i'd done this during one of my chocolate ext
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adavidm
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Repetier
It is sliced using the built in Curaengine. Slicing with the built in Slic3r works fine, no artifact.
It doesn't matter what object is used, every single STL sliced by Cura shows the same articfact, offset 'North' and 'West' of the object to be sliced. If you switch brim and skirt off you get no artifact.
I'm going to create a cura profile from scratch and see if that has the same effect.
adav
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adavidm
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Repetier
Hi,
Does anyone know why i'm getting this strange artifact in the skirt brim of any object I slice? It's like there is an extra object there but there isn't!
Not a big problem usually but very large objects make this appear out of the bed area which causes issues.
Thanks
adavidm
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adavidm
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Repetier
Wow!
That sounds perfect. Thanks for the incredible response.
adavidm
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adavidm
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Repetier
Hi,
I've designed and built a chocolate extruder for my printer, and have hit on a small snag.
I'm not using a heater at all, instead just putting warmed chocolate inside an insulated syringe. This should be enough for testing, if not I'll build a heated chamber. The problem I've got relates to thermistors. I don't have one on the 2nd (chocolate) extruder, so the printer won't start as the ther
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adavidm
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Repetier
Also, is the pullup resistor setting appropriate for your probe? I'm pretty sure I had to switch that off for my (trinket-based FSR) probe. I'll check my config.
:
#define FEATURE_Z_PROBE 1
#define Z_PROBE_BED_DISTANCE 10
#define Z_PROBE_PIN ORIG_Z_MIN_PIN
#define Z_PROBE_PULLUP 0
#define Z_PROBE_ON_HIGH 1
#define Z_PROBE_X_OFFSET 0
#define Z_PROBE_Y_OFFSET 0
#define Z_PROBE_WAIT_BEFORE_TEST 0
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adavidm
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Repetier
I think the state should be L(ow) when the probe is not triggered and (H)igh when it is. It appears you have that signal inverted. Is the probe a microswitch? If so you should be able to swap the connections. If not then you might have to invert the signal in firmware (either on the trinket/FSR board for FSRs or on the main Repetier firmware if not).
adavidm
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adavidm
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Repetier
Hi,
Are there any plans to add support for changing the first layer extrusion width using CuraEngine? This was recently added to Cura itself and can help give a really good first layer adhesion and finish.
The parameter appears in the cura.ini file that gets generated but always seems to match the calculated extrusion width.
See here for more info:
Thanks for the Repetier Host/Firmware, it's
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adavidm
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Repetier
What is the extruder steps per mm set to in the firmware and/or EEPROM? It sounds like this is set too low.
adavidm
by
adavidm
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Delta Machines
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