Hi guys,
I'm playing with my new extruder and would like to know how much it extrudes in a real print.
Is it possible to display extrusion volume in DWC? Printspeed, layerheight and layerwidth? should be available for calculations.
I extruded in free air to get ballpark numbers, but real life is different.
Best posts made by o_lampe
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Displaying current extrusion volume possible?
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RE: Music skipping beats after firmware update (3.4.0beta6)
@gtaman
It's actually the same:- create a global variable blockDaemon
- set global.blockDaemon = true at the start of the M300 file
- set global.blockDaemon = false at the end
Then anyone using Daemon.g for real can add these lines
while global.blockDaemon = true G4 S1000
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RE: Hollow shaft extruder
Had my first simpleFOC project running today. It was an old brushless gimbal controller without encoders and with 8bit mcu.
I was able to control two motors independently and relatively smooth (USB power only)
The atmega328 was also at it's limit, but I'm now confident it will work well with the right mcu. -
RE: External stepper drivers (TB6600) on duet 2 wifi
@m0ck1nj
Check the TB6600 datasheet. If it is OK with 3.3V signals on step, dir, enable you can wire it directly.
If it needs differential signals or 5V you can use the much cheaper expansion breakout board -
RE: Hollow shaft extruder
First print today
Instead of a benchy, I tried the extruder-woodgrain test. Yes there is some, but hardly visible. The corners were sharp and even, that was a relieve. The close loop PID setting are quite soft, so I expected worse...
At the top third, the printspeed got so low, that the filament overheated. 10°C less temp and it was nice and shiny again.
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RE: Accelerometer Usage
According to this picture
- positive X goes to the right
- positive Y goes to the back
- positive Z goes up
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RE: Smart Effector including toolboard-capabilities?
@dc42 said in Smart Effector including toolboard-capabilities?:
It's clear to me that the Orbiter could not be used with a Smart Effector made to the current dimensions. We would need to increase the rod spacing to at least 80mm in order to accommodate the various parts of the extruder. We are looking into this, however it would make it unsuitable for the smaller delta printers.
Hi dc42,
I just stumbled across this thread and wanted to guide you back to 2016 , when we discussed the cycloidal direct drive. (I still have it laying around)
I've made an 45 degree adapter for it, that suited the smart effector pretty well.Another way to mount it, was the split motor/gearbox idea.
I could try to reuse my motor and design a BMG-drive for the Smart effector?
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Display current back EMF for tuning
Hi devs,
based on the "extrusion volume" thread, I also think a back EMF calculator as DWC plugin would be helpful for tuning.
The required parameters are almost completely known for the calculation. It only misses coil resistance and inductivity (AFAIK)Since my Duet boards run on their own network, I don't have access to the EMF calculator at reprapfirmware.org
If we could integrate it as plugin and use 'live' values from the current object model/gcode file, we'd have a nice tuning tool
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RE: Add 'pre-retract' and 'post-retract'
@nikscha I like the idea. It's like the tool-change macros.
But there is also a problem when you retract / unretract within a toolchange.
Maybe you can solve your problem by renaming G10/G11 to G10.1 and G11.1 via postprocessing. Then you need only one macro for retraction (which also contains the real G10 move) -
RE: HELP! New Cast Alum. Bed doesn't seem to AutoMeshLevel
One thing not mentioned by anyone is the G31 probe offset. Are you sure it's OK?
Latest posts made by o_lampe
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RE: Hollow shaft extruder
@Phaedrux Possible, but I checked the video again and he adjusts the shaft-depths and locks it with a thumbscrew.
So either it's a rotating shaft in a fixable tube, or the screwhead doesn't fully clamp the blade and acts as a bearing, too.
Both ways wouldn't be easy to adapt to a blade-extruder. -
RE: [3.4.6] Odd behaviour of rotary axis
@T3P3Tony said in [3.4.6] Odd behaviour of rotary axis:
Are you saying that this does not work in 3.4.6?
At least it doesn't work in my specific case:
I've modified a working config.g to test the rotary motor only. Maybe I erased too much and the missing information messes up the setting?
Here's the whole config:
config.gHmm, I haven't set any printer kinematics with M669, but which one would I choose with only a rotary motor on axe A?
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RE: Hollow shaft extruder
@achrn Thanks for the links, but in the canadian closeup picture it looks horrible. I don't see, how it would rotate nicely.
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RE: Hollow shaft extruder
@JoergS5 Very interesting. The idea is to bulk-buy instead of DIY.
IMHO the biggest problem with Toms handmade bearings is to keep the diameter constant. -
RE: Hollow shaft extruder
Hi again,
we have discussed earlier to use pipe-cutter blades instead of flanged bearings.
Now I've seen a woodworking video which shows an interesting tool. The blade is very small and replaceable, so there's a good chance we can buy it separately and use it for our purpose, too.But I don't know the name of the tool. If anyone knows, pleas let me know.
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RE: [3.4.6] Odd behaviour of rotary axis
@o_lampe Found out, it has the same behaviour in linear mode...must've been a general change I've missed?
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[3.4.6] Odd behaviour of rotary axis
Hi gents,
In the past, when I put M350 before M92, it uses the microstepping value to calculate the real steps per unit. I could change the microstepping without having to change M92, too.
But for a rotary axis, I have to set it with the final value?M584 A4 R1 ; set drive mapping M350 A4 I0 ; configure microstepping w/o interpolation M92 A{200*4} ; set steps per turn
Another thing I noticed was the Object model.
Inmoves.rotation.angle
the value was always 0, although it showed the correct value in DWC.
Am I on the wrong path? I want to use several relative moves, but then query the OM to find out absolute position. -
RE: Fun Fact .. you can use GPT Chat For
The next logical thing to do: Remove the config-tool and add a link to GPT instead
Would be interesting to see it cobble together config.g and toolchanging macros for a multi-stream toolchanger printer with several daughter boards :muahaha -
RE: Super strong NEMA17 actuator w/o gearbox
A little follow up:
the guy from Pintobotics contacted me and directed me to his twisted string experiment.
The motion is nonlinear, but his equations made it possible to predict motion. -
RE: How to set M425 backlash compensation?
@JayT IMHO, the backlash question has been answered and we should keep the gap-discussion in your other thread.