@brunofporto said in Proposal for flexible endstop configuration in RRF 2.03:

Maybe it is already possible, but I do not know how to... I would like to MEASURE my axis. I use sensorless homing. And set the size of the printing area. Would be possible to just measure the travel length of an axis using sensorless homing?

That's already possible, if you can get stall detection to work reliably at both ends of the axis (it's probably easier to get a hard stall when the motor is pulling the carriage towards it, so that the length of belt under tension at the point of stall is small). Home to one end using a G1 S1 move, then measure the position of the other end using a G1 S3 move.

Just created a pull request for this...
https://github.com/dc42/RepRapFirmware/pull/248

gtjoseph opened this pull request in dc42/RepRapFirmware closed Add standby temp to JSON bed temps #248

@dc42 said in Websockets:

The firmware being written for Duet 3 uses websockets.

Under some conditions (e.g. when waiting for heaters to reach temperature), the Duet already sends regular status updates to PanelDue. I may extend the number of situations in which this occurs, for example to send regular status updates when running macro files or doing long moves.

Good deal David!

/me anxiously awaits the Duet 3 🙂

Sweet! Thank you.

@hayseed_byte said in M581 external trigger:

https://www.wildbot3d.com/contol-panel/

Thank you, interesting info.

That makes sense and eases my mind! Thank you very much for your help! 🙂

Thanks, I'll review it before next release.

@fma that's exactly what I defined 😉

@dc42 Yes, there still are cases, where this won't work, but at least it will cover some more bases than now. 🙂

@deckingman I dug it up here: https://somei3deas.wordpress.com/2017/04/18/stepper-motor-and-electronics-cooling/

@catalin_ro said in Support for a manual jog box / CNC MPG:

@danal As the lag/drop/dup in your message was not specifically related to any item on the MPG, I suspected the rotary encoder as sometimes really cheap ones are used. Clearly, if you say that everything is like that, the problem is either in the MPG itself or in the controller to which it is connected.

I'm pretty convinced it was the wireless link. The wheel seemed OK, "local" effects (the pendant had a display) were completely reliable, and the Mach controller responded to all other input devices very quickly and cleanly. Also, at one point Mach was ripped out and replaced by TinyG/Chilipeppr. Same problems with pendant.

Sort of leaves the wireless link.

Of course, I could really prove that for under $100, by purchasing the exact equivalent pendant, same manufacturer, in wired.

Just might do that.

Conditional gcode is in the works. See here: https://forum.duet3d.com/post/65006

@danal said in Truthiness. Verified Truthiness.:

@timcurtis67 said in Truthiness. Verified Truthiness.:

@rcarlyle The most accurate machines in the machine shop that I work in are Wire EDM machines. They don't use encoders but instead use glass scales to detect movement.

OK, I am going to be "That Guy".

A glass scale IS "an encoder". Attached to the final carriage instead of the motor shaft, which has tremendous advantages. Still, it is encoding position.

I think what you are saying is that they don't use rotary encoders on the motors. Which, as you point out, attaching the (glass scale) sensor to the final "control point" self-compensates for all backlash, etc. I have a mill that works this way, and it is great.

Yep that's what I'm saying. A glass scale is a type of encoder. A much more accurate one over time for the simple fact that with age the driving forces behind any mechanical movement wear. Rotary encoders on the end of servos (like in most CNC mills) only read the shaft movement, and that is before the coupler even.

But truly my point was the fact that are encoders really necessary on a glorified hot melt glue gun machine? (Thanks Ian 👍 )

If you like them and feel you will get better prints with them then by all means go for it.

@dc42 It's 4kb. Formatted to 32kb and the upload speed didn't really change.

Another Panel Due wish list item:

Current coordinates displayed in move screen.

Thank you David, hopefully allowing high jerk for travel moves will resolve the issue.

I'll try and source a 3mm bowden tube. In the mean time I'll turn off the pressure advance feature for now. I just printed a floppy cleaning kit someone asked for but the filament lost traction for about 10 layers before picking it up again due to the extreme back and forth motion of the extruder motor, especially with narrow infills like 2-5mm wide.

Especially the turn tool got out with under extruded layers, it was easy to snap them in two parts. I've reprinted it without PA and came out fine.
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