Need Help with BL Touch Set up

Phaedrux

@Shamusseven said in Need Help with BL Touch Set up:

One issue is my first calculation of me esteps was adding esteps. My second subtracted. 421. To 397.

@Shamusseven said in Need Help with BL Touch Set up:

It took me about 160% before my walls began to fuse together. Does this indicate my esteps are still wrong? 160% seems like a lot.

Yes it sounds like your esteps is still a bit off. What is the extruder? If you have an esteps value provided by the manufacturer, that would be a good place to start. It shouldn't be too far from that value. You may need to run the esteps calibration a few times to dial in on a value. It should start to converge around a value. It will largely depend on how accurate you are on the measurement. But really it just needs to be close. The fine adjustment can be accounted for in the slicer flow rate. 160% is a lot. When the esteps is close it should only be +- a few %.

@Shamusseven said in Need Help with BL Touch Set up:

Also a bigger issue I think is the mesh bed compensation.

Tackle that after you have extrusion dialed in.

@Shamusseven said in Need Help with BL Touch Set up:

And is this warping of the walls common?

With such thin walls and a short layer time, yes. It can help to add 5% infill to make each layer take longer which gives the walls more time to cool and solidify. You can also lower the printing temp and set the fan to full speed for better cooling.

The diagonal pattern in the lower half of your photo is classic under extrusion.

The stringing would indicate you either have retraction off, or are not using enough distance. It may also indicate the travel moves are too slow. How fast are your travels? Are they being limited by your XY axis max speeds? This also explains the gap/tear/seam at the corner. The nozzle has drizzled out the filament during the travel move and it takes a few mm before the nozzle is pressurized and able to extrude properly.

Take another run at esteps calibration. Do it several times until the esteps starts to coalesce around a value. Then redo the cube print at 100%.

Shamusseven

Thanks again. My extruder is the Hemera that has a base estep of 409. I don’t get it how much difference there is each time I run it. This time it calculates very close to 409. But I think I noticed something on my cura settings. I think my nozzle size was set wrong. I know that did not account for my estep difference but could for my test square. Odd thing is I ran another print at the 409 and 410 esteps and bother we’re letting out too much. I changed to the 397 and printed this. Nice thicker fused walls at just 100%. But still a little stringing I set my retraction at 1.25mm and speed at 70mm/s in Cura. Not positive my setting are right in cura as the retract rate goes orange if I enter something over 70. Not positive of my travel speed. I was increasing it throughout the below test and it did not seem to change the stringing at all.

But I then printed a 40mm test cube. Fairly happy with it except for some lifting on 2 sides because it did not adhere to the bed.

This read as 40mm exactly

.3 mm off here but not bad. Other side is 39.9

Phaedrux

Alright, in that case I would probably use the steps per mm as given by E3D for the hemera and then adjust the flow in the slicer.

Can you post your current config.g? Perhaps your E speed limit is restricting your retraction speed.

Shamusseven

here is the current config.gconfig (6).g

Phaedrux

M566 X1200.00 Y1200.00 Z720.00 E120.00        ; set maximum instantaneous speed changes (mm/min)
M203 X9000.00 Y9000.00 Z10800.00 E1200.00     ; set maximum speeds (mm/min)
M201 X500.00 Y500.00 Z20.00 E250.00            ; set accelerations (mm/s^2)

As I thought, your E axis speed limit is set to 20mm/s, so your requested 70mm/s was never being honored.

Try this

M566 X1200 Y1200 Z120 E3000        ; set maximum instantaneous speed changes (mm/min)
M203 X12000 Y12000 Z800 E6000     ; set maximum speeds (mm/min)
M201 X500 Y500 Z200 E2500            ; set accelerations (mm/s^2)
M204 P500 T2000 ; set accel for print and travel moves

I've increased the X Y E max speeds, faster E jerk and accel, and allowed for faster acceleration on travel moves, which should allow for faster travel moves and retractions. This will hopefully help eliminate the stringing on travels and the poor line starts.

Shamusseven

Well I will rerun my estep test again. Just making that change did not help much on my last ear save prints I did. Sloppy (looks to be too much extrusion) brims and lifting. And that is with my lower estep setting. I reduced the brim width and ran the print at 80% flow rate and it was cleaner but much too thin of a print. I am beginning to think I may never get this thing printing the way it was before all these “upgrades” lol.

Shamusseven

So I am having much better success now. Part of my bed is causing issue but I have been able to move my prints away from that area. I am getting good prints now. I am sure there could be some fine tuning still but happy

I have a couple of questions. First, after my first layer, my inner wall prints are very fast. Outer wall layers seem to be slow however Not sure what setting is causing that. Does not seem to be in Cura. Second, is there any trick to work the mesh bed better? I would think that would solve my bed issues but it is not. Thirdly. I get a error that shows up all the time. Not sure why or how to stop it. I guess it’s not a big issue cause I am able to print but wanted to ask. Pic

Pic of successful prints. Notice I am only printing a few at a time cause of print bed issues are confining me.

Phaedrux

@Shamusseven said in Need Help with BL Touch Set up:

First, after my first layer, my inner wall prints are very fast. Outer wall layers seem to be slow however Not sure what setting is causing that. Does not seem to be in Cura.

That is a normal arrangement and is configured in the slicer. YOU may need to unhide some settings in Cura for it to show all the different options. Cura has a lot LOT LOT of options and it hides many of them by default to prevent overwhelming people. In the speed section, click the gear and it will pop up a window showing all the available options to unhide.

How do you currently have you mesh configured? Perhaps you need to increase the density.

The chamber heater error is from Cura as well. Look in the hidden options and search for chamber. It's inserting a command to heat the chamber. You can disable it my setting the temp to 0 once it's unhidden.

Shamusseven

@Phaedrux got it. I will look for Both in Cura. No big issue except the speed is shaking everything. Still prints well I am guessing due to the box frame of the 5+ but I think I can slow it down a bit.

The mesh bed I have set 0-330 for x and y and set it at 30mm increments this past run. Was using 60mm before. It probes a lot and takes quite some time to complete at that rate. But it still had issues printing in a certain area.