@Anglu said in Temperature Difference of around 25 deg C:

Unfortunately, I have noticed that my printer is printing around 25 degrees C hotter than it should be.

How have you determined that? What filament did you use for your test print, and what temperatures did you select?

You can check the accuracy of the Duet temperature measurement by connecting a fixed resistor in place of the thermistor. It's possible to identify and correct for ADC errors in this way. See https://docs.duet3d.com/en/User_manual/Connecting_hardware/Temperature_connecting_thermistors_PT1000#manual-calibration. However, any ADC error should be much less than 25C.

@o_lampe
Perhaps it's time to start another hobby....

The idea of using an Arduino with a hall sensor sounds like fun, and I've seen an Arduino kit on Amazon which seems to fit the bill (except for the hall sensor, which is cheap enough), but I wonder if this would be more accurate than a laser measuring the reflection from reflective tape stuck to the spindle's collet nut - which is the method I currently use?

Of course, I'd need to learn how to program an Arduino!

@Phaedrux
I think what I'm looking for is a short macro (ZAdjustDown.g) which I could run from the command line, that will adjust the existing Z work zero by -0.1mm.

When the surfacing process is complete, the tool returns to Work coordinates X0, Y0, Z+5, but I would like the macro to change the actual Z starting point (without moving the spindle down) by -0.1mm, so that when I repeat the project, the spindle is moved down to the new start point and starts cutting from there.

I intend to assign the macro to a button on my jog controller, so I won't be necessary to enter it in the command line.

Thanks

@jens55
Often we are the worst person to review anything we ourselves did/wrote because we see what we "think" it should be and not what it is.

@jens55 thanks!

@RogerPodacter said in Dual Markforged Kinematics Setup:

M669 K1 X1:0:0:0 Y1👎0:1 Z0:0:1:0 U0:0:0:1; Matrix mapping for Axis - X:Y:Z:U

i solved my issue. maybe this helps someone in the future. i simply changed the Y matrix:

old

M669 K1 X1:0:0:0 Y1:-1:0:1 Z0:0:1:0 U0:0:0:1; Matrix mapping for Axis - X:Y:Z:U

new

M669 K1 X1:0:0:0 Y1:-1:0:-1 Z0:0:1:0 U0:0:0:1; Matrix mapping for Axis - X:Y:Z:U

@PCR unless you are running at 10,000mm/s^2 acceleration in z then I think gravity should still win right? Unless there is an awful lot of 'stiction' in the z bearings.

If it is from Z hop, surely you are always approaching the axis from the same direction (downwards), so backlash shouldn't be an issue? Or am I being naive and missing something...?

@Pascal-0 I've got the same build surface on my Ender 3 Pro and it works great. It looks like your bed is just misaligned, so try to level your bed. I haven't changed mine to CoreXZ, though.

@Havoc340 you could also use a small, simple tool like this to help you calibrate next time: https://www.emberprototypes.com/products/cxc

Give this a look for tuning your extrusion system to match speed. The key thing to know is the volumetric flow rate of your hotend. If you can maximize that with a combination of extrusion width, layer height, and print speed, the rest will follow easier. You may not need to move as fast if you're extruding more.

https://forum.duet3d.com/topic/14250/tuning-jerk-accel-speed-settings?_=1671825688469

@gnydick said in Input Shaping seems to break on different length moves:

@dc42 does it make sense to look at it as a whole first?

That's what we'll be doing in future, in order to detect when the top speed needs to be reduced in order to accommodate input shaping.

@dc42
Very nice. thanks
Please tell us when it's uploaded. I'm waiting for it since the very first hour of the 1hcl 😄

@Gregory it's described at https://docs.duet3d.com/en/User_manual/Reference/Gcodes#g31-set-or-report-current-probe-status although the text isn't as clear as it could be.

Yes you can, just send an updated M671 before each attempt whether you want to adjust the Z axis or adjust the 4 bed points.

https://docs.duet3d.com/en/User_manual/Connecting_hardware/Z_probe_manual_levelling

https://docs.duet3d.com/en/User_manual/Connecting_hardware/Z_probe_auto_levelling

@tgarr said in MonoPrice Delta Pro - Height Map Interpretation?:

Does the rippling in the height map look like the result of a slightly wobbly rail? Or something else?

That pattern (ridges at one end of X turning into valleys at the other end) indicates that there is backlash in the mechanics. What's happening is that when the effector moves to a particular XY point other than the centre, the nozzle height depends on the direction from which the effector approached that point. G29 in RRF scans alternate lines in opposite directions, hence the alternate ridges and valleys.

To fix or at least mitigate this:

Check that the belts are sufficiently tight Check that the motor pulley grub screws are tight Lubricate the ball joints and the carriage rails or wheel bearings

@dc42 Thanks for letting me know!

@jay_s_uk

G91 ;realtive mode
G1 Z275 F1000 H1 ; move Z rapidly / 300mm up/ until Homing is triggered - the 275 is larger than the stroke.
G90 ;absolute mode
G1 Z256 F10 ; retract z 3mm slowly (Z 259 reaches the microswitch) so it backs off 3mm)
G91 ;realtive mode
G1 Z5 F0.1 H1 ; rehome at slow speed (then home very slowly)
G90 ; return to asoute mode
G1 Z261 ; back off (this goes down a bit away from the switch)

@bob0191 said in HELP with ender 3 duet2 wifi:

command M503 but this failed

Did you mean M303?

https://docs.duet3d.com/en/User_manual/Connecting_hardware/Heaters_tuning