@oliof Thanks. I'll take a look at those.

@Veti said in Dual extruder with ABS and PLA?:

no necessarily. look at the bmg.

I'd be tempted to use two orbiters
AFAIK, the SLA version 1 is avalable in a mirrored housing.
But I'm afraid that the later versions made by injection molding, won't be availabe in mirrored. At least I haven't seen them yet (V1.5)

@deckingman said in Dual extruder with ABS and PLA?:

Why use PLA as a support?

Because lately I asked abut the chance to mix parts from PLA and ABS. Someone said, they won't bond and actually the materials are often used as part/support combo.
I wanted to give it a try...

Not so sure about ABS anymore. My capacitive probe doesn't like either the chamber temp or bed temp, I'd need for ABS.
So I'd have to home cold which I don't like...
Are their other probetyps less temp-sensitive?
I also have dc42's differential IR probe or inductive probes (which I replaced with capacitive for a reason I forgot)

@Veti Thank you Veti, I will take a look. I also need to look at PSU's then.

@Luke-sLaboratory same here, I design printers and parts but Im not a programmer.. ill take a look at your mini when its gona be public as I think they use the same chip so it might be a good start.
Yet I havent found anyone who installed klippers on 6hc/3hc..

@LB said in stepper precision:

@arhi
As you already pointed out yourself: if you shift the offset on the left to 0 in the middle of the "wave", then you have only +-0.1 which would be not that much for a 1.8° Stepper?

yes, only I'm not sure where these offsets originally come from but I'll redo those analysis as soon as I get out of the pickle with the bread and butter stuff 🙂

if its otherwise functional you could look into com2com / socat to setup some virtual serial ports to tap into the communication between whatever software it comes with.

@bot maybe. I know the silky filaments do this. If you've never done it, extrude a long section of some silky stuff with your gantry in the air. It looks like an earthworm locomoting.

As far as I understand, they use pre and post-processing scripts.

@Phaedrux
Now that I have a working homeAll procedure, I've edited the existing gcode-files and the slicer start/end procedures. The wrong layercount is history now.

Good to hear. Maybe one of these days i'll dust it off and try again.

@Stephen6309 said in Blind spot on my LokBuild print surface:

@o_lampe I use denatured alcohol to clean my PEI surface.

+1

depending on what board and version you are running, you can do it with this handy extension:
https://forum.duet3d.com/topic/13194/dsf-extension-exec-on-mcode-was-shutdown-sbc

I think the easiest answer is all of the issues related to Cartesian printers and movements were solved with pen plotters and dot matrix printers. Big companies have been able to produce the most efficient and cheap way to solve the issues so other than a moving Z platform it's virtually plug and play. Also, as I stated previously the processing power to control 4 stepper motors was right at the limit for 8 bit boards. Another disadvantage is the size of the machine, it has to be much taller than the equivalent sized cartesian due to movement required for the edges of the bed, also the bed is round rather than square / rectangular.

The Kinematic control of the head has caught up now so it's lovely and smooth, by design the head will be horizontal (although I did read of paper where they had printed in a terrain following method for the top layers, just required knowledge of the head shape to avoid clashes - this was a few years ago and I can't find any further work carried out - maybe Simplify3D V5 🙂

My SpiderBot is the V1.5 with various upgrades through SpiderBot and the prototype dual head. Attached are a couple of pictures, maybe best to have them side by side as the cantilever of the head via the servo is subtle but is an elegant solution to dual head woes (one of my other printers is the BigBox Dual with print heads the same height so I'm used to suffering the issues with the 1st layer).

[http://www.spiderbot.eu/spiderbot-v2-1-whats-new/?lang=en](link url)

SpiderBot - Tool 1.JPG SpiderBot - Tool 0.JPG

The original design used ball bearings secured with epoxy, as the printer is used with a heated chamber this heat cycling (or my cold shed) caused them to fall off. Philippe (owner of SpiderBot) improved the design by riveting the balls onto the aluminium.

I'm more than happy with mine and the assistance I've had over the years for SpiderBot, it just doesn't get used as much due to having multiple printers and not using ABS.

It's well worth having a nosey though the older blog articles to see the engineering iterations leading up to the latest versions.

This is what I found and looks like what I need
Plate

And this is the answer I got from them
" They are cast, Machined top and bottom, & coated too "
The coated too may be a small problem but think I can easily trough a glass on top until coating will be gone

there is this
https://de.aliexpress.com/item/1005001809789659.html

a modified mosquito with the same mounting holes as the swiss hotend.

@zapta said in esteps vs multiplier:

Another example that comes to mind is the start G-code purge line. It's effected by the esteps settings but not by the multiplier.

Yes, likewise retract/reprime moves in pause.g and resume.g.

@mrehorstdmd, thanks much for the ideas! I use rollers now, they just support the bottom edge of the spool - but not like the pictures you attached.

Cheers,
Kolbi

I have some 11 year old natural PLA from bitsfrombytes, 3mm dia, that you can't unspool 😄 .. it does not crack as easy as some modern old PLA but is hardened so much you can't uncoil and straighten it .. I did manage to print with it using a heat gun to heat it up while unspooling but is a manual process acceptable for test only, not for actual printing; it's only total of maybe 500g so not really a big deal (when I remember how much I paid for it it hurts) ... but this last issue was with ABS. Not sure why this happens. I seen few times in videos of ppl like Tomas or Joel that they mention "these are old spools of filament that is unprintable" so they too have the issue of - after some time on the shell filament is unusable, but why ?!

Also, what's weird, as I already mentioned, I have pieces printed out of PLA that are 10 years old and still are totally ok, never became brittle?! Why does filament becomes extra brittle and week while printed part does not ?!