E-steps

[ericpudding]

I'm just wondering what values you have for your e-steps. I have just used the value that they gave me in the manual of 92.65 and then calibrated the extrusion multiplier to fix the problems with the extrusion rate because it was extruding too much. When I tired calibrating the e-steps by measuring 120mm and telling it to extrude 100mm i got a value of around 120 when that value needed to be smaller that 92.65 because I knew it was extruding too much on prints. The extrusion multiplier is .81 which is below the recommended values between .9-1.1. Do I need to calibrate the e-steps? What are your values for the e-steps to help me get a gauge of what it should be. I have the wantai motor if that information is useful.

[McSlappy]

Did you see this video? https://www.youtube.com/watch?v=1GyiivRWzHc

Also the values that each of us have for e-steps probably wont help much. One of my machines has 104.95 and the other has 98, it's pretty machine-dependant as far as I can tell.

Set you extrusion multiplier back to 1.0 and yes recalibrate the e-steps, you want this value correct
You might end up with a varied extrusion multiplier that's slightly over or below depending on the filament, for the most part they will be on, or very close to 1.0. I only have a couple of filaments that I adjust the multiplier on.

[ericpudding]

i used the method on that video and it seems that my e-steps is already pretty spot on but it still extrudes a lot more filament than it needs to during a print. and thats after i measured the diameter of the filament so I used the extrusion multiplier to fix the problem. I got a multiplier value of .81 which is well below the .9-1.1 range on slic3r. I'm not sure what could be causing this but i'm not really worried cause i fixed the extrusion rate one way or the other.

[bot]

Instead of using the extrusion multiplier, why not adjust the filament diameter to be the actual measured average? Consider that filament can have a non-circular cross-section, so measure twice at the same point, rotated 90 degrees, and take the average of THAT and other measurements.

[McSlappy]

That does seem very odd having such a low extrusion rate... Have you tried another slicer like Kiss as an experiment?

[ericpudding]

yes, i have tried other softwares but still got the same issue with the extrusion rate.

[Russ]

Excellent vid, McSlappy! Mine calibrated to 90.8.

Question: How can seemingly identical Max V2's have different e-steps?

Cheers,

[DavidF]

Excellent vid, McSlappy! Mine calibrated to 90.8.

Question: How can seemingly identical Max V2's have different e-steps?

Cheers,

Moybe the hobbed gear diameters are different??

[geneb]

Excellent vid, McSlappy! Mine calibrated to 90.8.

Question: How can seemingly identical Max V2's have different e-steps?

Cheers,

Russ, that's something that I struggled with early on. It's not just e-steps either. While the machines are made from identical parts, no two are assembled exactly the same. This contributes to those little differences between machines.

I suspect this is the case even with the high-dollar FDM printers, but the calibration differences are hidden from the end-user because each machine is calibrated before it's shipped.

g.

[Nylocke]

The effective diameter of the drive gear is going to be different because tolerance.

Also because of the teeth on the gear, the diameter is subject to change based on plastic, tension, and motor temps. This is mostly negligible, though it does explain McSlappy's extrusion modifier changes on certain filaments.

[Russ]

Good answers and I think I understand now. In the case of the Max V2, then the main factors would be the hobbed gear diameter. I saw some pics of some that are less hobbed(?) than others, so the diameter would be different. So, how often should we re-do the e-step calibration? Would a change of filament (say, from different manufacturers) make much of a difference?

[Nylocke]

The change with different materials would be so small it wouldn't be worth it. If you notice a difference it would probably be within +-5% and should just be accounted for with the extrusion multiplier.