Topics created by magnets99

thanks, i can't seem to find my plate for replacement.
I can find lots of the heating PCB but not the actual metal plate.
I've tried
bed plate
plate
heated plate
ultimaker 2
and HB13 which is silk-screened on the pcb heater underneath the plate
any ideas?

i'm in australia

@dc42 said in hierarchy of control over gcodes, machine vs filament vs slicer:

The printer speed and acceleration limits should always be set no higher than the printer can reliably achieve. Otherwise you may end up with the slicer commanding the printer to move faster than it can manage, especially if you use the speed factor control in DWC or PanelDue to increase speed. You can of course set lower speeds and accelerations in the slicer settings.

That's something I have wondered in the past. If the slicer says to move at 100mm/s, and RRF has the speed limit set to 150mm/s, I would expect the printer to move at 100mm/s. If the speed factor control is then set to 200% in DWC, what happens? How fast does RRF drive the printer? 150 or 200mm/s?

I mention speeds, but presumably this applies to accelerations just the same?

I did look in the DWC manual for the speed factor control but it wasn't clear to me what limits were still imposed, if any.

This also had me wondering the other day as I was adjusting pressure advance as well as input shaping. In particular if pressure advance could result in extruder feed rates outside the limits that I had specified in RRF, and if some sort of clipping might occur if hard limits were enforced resulting in some obscure printing artefact. Same with input shaping and how the actual moves sent to move the head might look after going through a 'shaper filter' and whether they too were being 'clipped'. ... I have a background in audio design where clipping is just about the worst thing imaginable for a poor audiophile. 🙂

Now that I'm running two linear delta machines, where the amount the effector moves is not nicely related to the rotation of a single stepper but some combination of all three depending where on the print bed you are, it really starts to do my head in. Plus that's without considering bed mesh correction, tapering, skew adjustment, or others I don't even know about. 🙂

A user submitted a pull request to PrusaSlicer some time ago to fetch the printer speed and acceleration limits from the RRF object model and to modify the print time calculation to better reflect RRF when RRF is the selected firmware type; but unfortunately it wasn't actioned. See https://github.com/prusa3d/PrusaSlicer/pull/8087.

Oh, that's a shame, I for one would have found it useful.

@magnets99 The gantry is pretty interesting: They use the smooth rods for linear motion and as rotating shaft.
I wonder how well that works with these linear ball bearings? Especially on pure X or Y moves (i.e. homing) they will suffer.
I'd replace them with IGUS bearings if they seem to be worn out.

@Phaedrux
I think because i was doing basic stuff it was ok, but yes, it did get a few things wrong:

*3. Test Manual Pin Movement
Manually deploy the probe pin and push it gently into the housing while sending:

gcode
Copy code
M119
If the probe doesn't register as triggered when pushed, the issue may be:
A wiring problem.
A faulty BLTouch.
A configuration issue with the signal pin.*

Which would be good advice if i was using it as an end stop, but i wasn't.
But got me looking at the wiring...

@magnets99 said in M308 error with the W value, doc has - config does not:

Next issue is even though i have selected 4 as my number of wires, it is submitting the W argument as "K"

Shouldn't it be W4?
And i think K is an argument for the thermister type letter.

Thanks for reporting this, it's now fixed.

@magnets99 I’d think you could do the same thing with a BLTouch for 3D shapes, as the sensitivity and repeatability is usually around 0.01mm. However, if it’s a 2D shape that you’re trying to get the outline of, like a PCB, I’d think keeping it simple and using a scanner, or taking a photo of it, would be simpler and faster.

Ian

@magnets99 correct. Think of it as enough to get you going with most commands in place, but you have no idea whether motors are turning the correct way etc until you start to commission. The rest of the changes are then made at the machine in config.g

how do i mark this as solved?