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
-
Displaying current extrusion volume possible?
-
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
-
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.
-
RE: Accelerometer Usage
According to this picture
- positive X goes to the right
- positive Y goes to the back
- positive Z goes up
-
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?
-
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
-
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
-
RE: Cannot run CNC slower than 0.6mm/min
@droftarts said in Cannot run CNC slower than 0.6mm/min:
Also, the maximum time that a move is allowed to take is about 30 minutes and currently RRF doesn't behave nicely if you try to schedule a move that will take longer than that
[Somewhat OT]
On several occasions I promoted the workaround for nonexistent "continuous rotation" where the user defined a regular axis with a length of upto 2^31 steps to be able " to rotate for days".
Now I'm not so sure, this axis will rotate longer than 30min? Do we have to combine such an axis with segmentation? -
RE: CNC Parallel SCARA Plasma Cutter - GCODE Issues
@NortonAntivirus YIKES!
Seeing a bandsander and a miter saw in the same room with a plasma torch is giving me the creeps. I hope it's only temporary?
The sparks of the torch can fly upto 10meter wide and are a serious fire hazard.
Woodchip walls are no good idea either.I've placed my torch on a water tank.
-
RE: Plug-in Idea
@br7408 My understanding is: we don't need IS on short moves, because due to the acceleration, we never reach the resonance speed.
YMMV, because it's also related to jerk settings. -
RE: Weird line shifting
@ziggymanpopo That's called skipped steps when motor and driver run out of sync. It's coming from too high acceleration or end-speed.
Sometimes it helps to reduce motor current, because then the back EMF at high speed is also lower. -
RE: A breakthrough in bed levelling design !
@Richard-F THAT changes everything
-
RE: CNC Parallel SCARA Plasma Cutter - GCODE Issues
@NortonAntivirus A gcode-generator doesn't care about your kinematics. It only tells where to go, but not how to get there.
That's part of the RRFirmware and it's identical in FFF or CNC mode.
Homing and start/end procedures may have to be edited and also the workspace limits are different for a SCARA.
There are minor differences in CNC mode and mostly Duet Web control related. The UI is different but not the kinematic. -
RE: CNC Parallel SCARA Plasma Cutter - GCODE Issues
@NortonAntivirus From my understanding G94 is only required to switch back and forth between G93 and G94.
In FW-version 3.4.x G94 is the default feed rate mode and should work with all Duet boards.I'm also working on a CNC plasma table, but it's in early stages. I expect to use either lightburn laser SW or a laser-gcode plugin for inkscape.
Basically I see no big difference between laser- and plasma cutting. Maybe have to edit the generated files a bit... -
RE: BLDC &encoder driver for a large laser cutter?
@flopes There is the STM B_G431B_ESC board, which works with hardware-encoder for medium power BLDC motors.
It can be flashed with simpleFOC, which allows you to control the motor via step/dir interface by gcode directly or UART messages (for constant speed or torque use cases) -
RE: Extruder Concept . AM i mad
@Richard-F said in Extruder Concept . AM i mad:
@Richard-F But i know what the 3d market needs is cheap affordable servo drives , i know there is "0-drive "
but an add-on for duet would sell like hot cakesThere is also simpleFOC-mini, which is running a BLDC motor with step/dir interface by RRF in my DD extruder.
It uses a GM3506 gimbal motor and upped the available torque a lot.An older version of O-drive can also be used (IIRC V3.6, before they went closed source) but that's hacker-talk, no mainstream stuff.
-
RE: Extruder Concept . AM i mad
@Richard-F I see two pinch-points where the belt has enough grip to feed. It's between the upper two pulleys and the lower two.
The area between the pulley pairs is more like a contact area. Not much grip to write home about...
Things can go wrong if the upper pair pushes on while for any reason the lower pair slips (say: temp rise from the hotend)
The filament would be pushed sideways out off the path.
Another possible failure is: the belts could deform at the pinch areas if the extruder is idle for too long. You'd have to release the pulley pressure between print jobs (say: over the weekend in a maker shop)