Zesty Tech Nimble and retraction issues/re-engaging issues

fcwilt

@dakota said in Zesty Tech Nimble and retraction issues/re-engaging issues:

Which is why I am so confused @fcwilt, I haven't found a single post regarding a similar issue like mine...

I run PLA at 195-200 but, of course, component variations may mean that my 200 is not the same as your 200.

I've never tried as low as 175.

Did you try the 1mm retraction that I use?

Frederick

Gone2Far

I run PLA at 215/210. Need a bit better cooling, but it comes out OK if I don't print thin spires or the like. Using a small stepper for the nimble. Had problems with losing steps with a regular sized stepper.

Here's my settings:
M92 X160 Y160 Z160 E2600 ; Set steps per mm
M566 X1200 Y1200 Z1200 E100 ; Set maximum instantaneous speed changes (mm/min)
M203 X22000 Y22000 Z22000 E6000 ; Set maximum speeds (mm/min)
M201 X6000 Y6000 Z6000 E1500 ; Set accelerations (mm/s^2)
M906 X1000 Y1000 Z1000 E750 I30 ; Set motor currents (mA) and motor idle factor in per cent
M84 S30 ; Set idle timeout
M207 S2.0 F1500 T900 Z0.5 ; Set FW retraction length and speed
M572 D0 S0.10 ; Set pressure advance

Dakota

@gone2far did your extruder extrude more plastic at the start of each extrusion when it skipped steps?

Dakota

@fcwilt sorry for the late reply.
i tried the 1mm retraction and that didn't solve my issue, however it did prove I didn't need to retract 4mm like i was.

my running theory is that my heat sink is not providing a cool enough zone compared to the heater block, giving the filament a larger elasticity zone when retracting.

however i never had this issue before when i was using marlin with all the same hardware... this issue is really making me question how much i thought i knew haha

fcwilt

@dakota said in Zesty Tech Nimble and retraction issues/re-engaging issues:

@fcwilt sorry for the late reply.
i tried the 1mm retraction and that didn't solve my issue, however it did prove I didn't need to retract 4mm like i was.

Did you disable pressure advance? That should not be needed with the Nimble.

Frederick

Dakota

@fcwilt As of now I still need the pressure advance to maintain a good print. However over the holidays I have been working on redesigning some components and implementing a 40mm noctua fan for my heat sink. once I have it all thrown together I'll try no pressure advance and see where that lands me.

Jarery

I'm just jumping back into this 3d printer adventure, printer being down the last 6 months.

I have a zesty nimble, and volcano using 0.8 nozzle and am using PETG.

I have yet to find a good combo of settings to get my prints to where I want.
I have also just started playing with Pressure advance. Using the calibration print that is in another thread with the python script to adjust it, It tells me I need 0.17 pressure advance.

This then makes my prints extremely slow, so I have upped the jerk from the recommended 40 to 80 and 100.

I'm no longer sure the correct methodology for calibration with every new variable.
The above mentioned print is great for calibrating Pressure advance, but what is a good methodology/calibration for acceleration, and jerk ?

fcwilt

@jarery

Hi,

I use a Nimble with a .4 nozzle on a delta.

I have not used pressure advance as it works fine without.

Frederick

999dom999

Dakota, I have the exact same issue as you with my Nimble and using simplify3D. The print in your video is a mirror of my prints. Did you get it sorted, if so please can you share your settings?

LHelge

Seems like most of you have a very high pressure advance. I run a Zesty Nimble on a Hypercube Evolution with a 0.6 mm E3D Volcano hotend. Sweet spot seems to be somewhere around 0.01-0.03 depending on how flexible the filament is.

I usually run 2 mm retraction at 40 mm/s, seems to work good for the Volcano.

I created this script to generate test files for pressure advance calibration if you would like to try:
https://github.com/LHelge/RRF_PressureAdvanceCalibration