jagged flame
I'm attempting to play with ramming.
Set the toolhead sensor to 'buffer', then :
"CALIBRATE_AFC BOWDEN=lane1"
And I get an error :
!! '-20.0' is not a valid length. Please check your setup and re-run calibration
Makes no sense to me ; I first calibrated the turtle with the (dual) sensor, afc_bowden_length was set to 1095.0, and extruder to hub distance was calibrated too (all lanes).
What am I doing wrong ?
past furnaceBOT
<@&1304550334839918672>
patent gazelle
Sounds like your buffer is open, or one of the switches is triggered before the move to me
jagged flame
I'm not sure...
The Turtle Neck is in neutral position. Maybe I should invert and or pull the pins up [EDIT : no !]...
It's been a while since I tuned the turtle for the first time... 1 year ! Rebuilt itt as well as the V2.4
Also, I don't understand why the buffer pins are disabled at boot time.
[EDIT] both sensors turn green/checked when pushing/pulling the slider (one or the other of course !)
peak jackal
I'm not sure...
The Turtle Neck is in neutral position. Maybe I should invert an...
They are not disabled if you are talking about them now showing enabled in the gui. Enabling/disabling them in the gui does not affect how it works.
But verify that the switches show compressed/expanded when pushing/pulling the neck to trigger the switches
jagged flame
Found the issue : wiring.
When the hub sensor is activated, both buffer sensors are turning green.
(I made a combo hub + buffer, and made some wires salad...)
peak jackal
Oh yeah that sounds wrong
jagged flame
This is where something's wrong. 3 switches, sharing one GND. Most likely GND from the buffer connected to the active side of the hub switch (?). Now fixing the issue.
gaunt elbow
you can share 1 GND but it has to be wired right as you have discivered
pure birch
If both were triggering off one or the other, I'd say you got common and signal mixed up.
jagged flame
I am stupid ! Of course, I can't do what I did !
Was simplifying wiring, as I use a EBB42 as bridge + GPIO : wanted to connect everything to the endstops terminal.
Maybe I could insert a few diodes... Assuming 0.65V will not hurt...
peak jackal
This is where something's wrong. 3 switches, sharing one GND. Most likely GND fr...
This is going to be interesting to see how well the combiner works, looks sweet!!
jagged flame
Found. (was thinking of something else at first, hence diodes)
Mirrored connector. Wiring late at night + black wires for the look -> lost 2 hours, .
(I think it will now work...)
jagged flame
New issues...
Of course, the auto calibrated lenghtes were wrong with the wire mess. And didn't think of it. As a result I got a jam in the hub.
And something else.
The sensors are now independant, and working as expected. But the turtle didn't stop pushing after the buffer was fully expanded ; took another 5 minutes before I understand expanded and compressed GPIOs were swapped.
But got a successfull ramming calibration. In your opinion, what tolerance, relative to toolhead sensor, is acceptable with my elastomeric springs loaded mini TN ? And repeatability ? Before I upload STEPs.
gaunt elbow
what do you mean by tolerance?
peak jackal
You also might want to update your hub_clear_move_dis to help prevent the clogs
jagged flame
You also might want to update your hub_clear_move_dis to help prevent the clogs
Manyu thanks ! Was wondering the name of the parameter !
jagged flame
what do you mean by tolerance?
I mean the difference between ramming measurements, and sensor measurements. Bacause the spring adds some force, and some bending in the system. The sensivity is not adjustable. Have to do more testing...
gaunt elbow
Ah, well I think length calibration goes on 5mm increments
jagged flame
Ah, well I think length calibration goes on 5mm increments
Will see.
+-5mm will be the goal. This is a bit more than what I get with sensors. Looks more like +-10 mm. Will test.
jagged flame
I'm not sure but it seems to me that the filament is pushed by long moves increments, and fully retracted as soon as the buffer is triggered. No short moves for increased accuracy / resolution.
Is this the expected behaviour for sensorless toolheads / ramming ?
peak jackal
you talking about when loading?
jagged flame
When calibrating.
Spent about an hour reeading the docs and the cfg files, found nothing. Also had a look into the *.py files but didn't find the algo.
gaunt elbow
it should be doing short moves the whole way