Topics created by tkln

@tkln said in Heatbed shows wrong temperature.:

M308 S0 P"temp0" Y"thermistor" T100000 B3950

Most likely your thermistor is a 10k ohm version, not 100k ohm. Take out one of the zeros in the T parameter. It would be best to get the thermistor specification from the manufacturer, so both the T and B parameter are correct for your thermistor.

Ian

@droftarts Thank you very much for your quick feedback and good ideas. ❤

@tkln Check out M913, it does the trick (I think)

@tkln to switch kinematics see https://docs.duet3d.com/User_manual/Reference/Gcodes#m669-set-kinematics-type-and-kinematics-parameters

There is no Object Model value that holds the 'actual' axis position, rather than the XYZ position. So it is going to be necessary to home the machine once you have switched kinematics. At this point things start to get complex, as you'll need to remap the endstop pins as well, and provide M208 limits for each axis, amongst other things. It might be easier to treat it as two separate machines, and have separate configuration sets for each. To make this easier, and then switching between them more easy, use M505: https://docs.duet3d.com/en/User_manual/Reference/Gcodes#m505-set-configuration-file-folder

Ian

@droftarts

Exactly.
I use this slicer https://layerperformance.com/en

@jay_s_uk @dc42 thanks for the quick help ❤

@dc42 thanks that works ❤

@tkln on a delta, yes.

@tkln just map them again using M584

@apak
Thank you for the solution. ❤

@tkln
Solution: https://forum.duet3d.com/post/315912

@tkln no, you need to define each motor as a separate axis, and move that. So for the X axis, define an extra axis U which has the motor you want to move independently:

M584 X0.2:0.3 U0.3

Then you can move the U axis with G1 U5 (relative rather than anbsolute axis movements will probably work best). I’m not sure exactly what will happen when you send a subsequent G1 X… movement, though. It should keep the spacing you have set. You will also need to home the U axis first, or give it a position with G92.

RRF does not natively support a six axis delta, so it will rely on the slicer to send appropriate commands if using more than the standard 3 axes.

Ian

@tkln I guess, that's not doable right now, but you could try sensorless homing for one of the motors on each tower.

Programming Z probes connected to expansion boards is not yet supported. For now you need to temporarily connect the Smart Effector to the main board if you want to change its sensitivity. I've logged this issue: https://github.com/Duet3D/RepRapFirmware/issues/815

dc42 created this issue in Duet3D/RepRapFirmware open Support programming Smart Effector sensitivity when the effector is connected to an expansion board #815

@ov_darkness the 1.02 version you can. same with the 3HC

Hey,
here are some updates from the project "6 Axis linear Delta".

The connected motors works well.

@tkln said in 6 Axis linear Delta:

M584 X0:4 Y1:5 Z2:6 E3; two motors for x, y, z connected to driver outputs

So the first test was successful and the 6 axis linear delta does exactly what a 3 axis linear delta should do.
My plan is that the Effector can tild 45° over a 300 mm Printbed.
Fun fact the diagonal Rod length is much much longer compared to a 3 axis linear delta to achieve the 45° tilt. 😄

Now I have to separate the 6 motors.
-> My next step is to modify the kinematics for 6 Axis.
Does anyone here have any information and/or ideas?

Is it possible to modify the files (LinearDeltaKinematics.cpp, LinearDeltaKinematics.h) and add 3 axes or is it better to create a completely new kinematic?

LinearDeltaKinematics.cpp GithubDuet3d LinearDeltaKinematics.h GithubDuet3d

Can I use the Denavit-Hartenberg transformation (DH Transformation) to build the Inverse Kinematic or doesn't the RepRapFirmware support it?

I'm happy about every idea and support ❤

@tkln good question … I’m not sure! I was planning on converting my small delta (RepRapPro Fisher) to smart effector. Currently, the nozzle sits quite close to the effector (an advantage as any effector tilt causes less nozzle tilt), and I’d lose a lot of print height if I mounted it hanging below, so I planned to make a mount that held the top off the hot end (cooling fins of a V6 hotend) above the smart effector, with the heater block and nozzle below, using the three holes. I haven’t actually tried it yet for fit, so not sure if it will work (plus cooling, wiring etc) but hadn’t actually thought about whether it would register as triggered. I guess it would, but possibly require more force, and may need some tuning. Someone will have to try it to find out!

Ian

Hi guys, did you ever resolve this? I'm going through a similar issue. Thinking of running 24V to my 6HC and 48V to the expansion board (3HC). Will this work? New topic posted here:

https://forum.duet3d.com/topic/36953/duet6hc-24v-and-48v-psu-s-for-different-components/8?_=1731730867239

Thanks 🙂