Topics created by Nightowl

Thank you, @T3P3Tony

I was glad to help where I could, after all the help I had had!

@achrn Whoops! Thanks for that

@Nightowl said in Resume on power failure - CNC:

Just out of curiosity, am I correct in thinking the pause.g file is relevant to this process, and that the resume.g file can be used after powering down and restarting the machine, or have I got my wires crissed?

The pause.g and resume.g files are not relevant to resume after power fail. However, any time you pause a print, resurrect.g gets written. This is to allow you to pause the job and then power down, knowing that you can resume it if you have set up resurrect-prologue.g appropriately. This works for 3D printing; I don't know whether it is appropriate for CNC applications.

@Nightowl EXCELLENT!!!

@Nightowl I am out of the office today, but as there is an Arduino port for the RP2040 then it's likely that the original Arduino program will work on the RP2040 if you adjust the pin numbers if needed.

@jay_s_uk
Yeah, I kind of get that. I had a bit of an issue with the manufacturer of my previous machine on this subject, but they believed it was perfectly acceptable to do this. What made matters worse was their machine barrelled forward to the front edge after homing, to prompt for a tool. I thought that was more dangerous.

I probably won’t do this 👍🤔

Never mind, I’m sorted ✅

Thank you, @T3P3Tony

@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

@dc42 said in Support forPWM Conversion:

@jay_s_uk RS485 is something we may support in future. We're already looking at making a daughterboard to support it.

FYI
Supporting RS485 also opens the door to controlling the output of a plasma cutting system from the cnc controller.
Here is the programmers refererence for Hypertherm RS485 implementation

@pixelpieper thanks for your report. I am surprised you find a difference between 3.4.4 and 3.4.5 because the code changes between those versions are small. However, we have two other reports of homing not working correctly in 3.4.5 when it worked using 3.4.1, including https://forum.duet3d.com/topic/30696/homing-issues. I will investigate.

@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!

@droftarts
Thank you 🙂

Here's the updated connection diagram:

Screenshot 2022-12-02 at 18.30.44.png

...and this is the code from the config.g file:

; Milling motor and relay configuration M950 R0 C"vfd+out7" L4000:25000 Q1000 ; enable router relay on out7 M563 P0 S"St George" R0 ; assign spindle 0 to tool 0 and name it St George T0 ; select tool 0 M5 ; ensure motor is turned off

Note: I have used this relay to provide mains power to the milling motor, which is activated from Out7 in this case. I guess any Out could be used, but the code would need to be changed accordingly.

Many thanks to @dc42 and @jay_s_uk for helping me resolve this, and I hope this diagram will be of use to others.

I've done a little drawing, so perhaps this will be of use to someone in the future...

1670005889542-screenshot-2022-12-02-at-18.30.44.png

Enjoy!

Edit: Changed image to the real one!

@Nightowl said in Big ask... Z probing:

G1 Z{max(move.axes[2].userPosition+5,move.axes[2].max-5)} F2400 ; move the Z axis to 5mm below Zmax

I think that first max should be a min, in case Z axis is already at max.

You will also need to use G31 to set the trigger height of the Z probe, normally in config.g after the M558 command.

You can use G60 to save the position before probing, and G0 with the R parameter to go back to that position or a related position.

Got it, thank you @deckingman

I'll have a play and see how it goes - but getting it to 40 deg at the moment, might be a tad difficult. I'll test it at a lower temperature.

Thanks again.

@deckingman I'm going to pay more attention, for sure, but I'm pretty sure I've seen longer messages in the pop-up without telling me to check the Console!