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endorphin3d / endorphin

The Ender 5 as it should be
MIT License
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Difficulty configuring marlin #1

Open powermandan opened 11 months ago

powermandan commented 11 months ago

Hi, I have implemented stage one of endorphin. I having problems with the firmware. I'm am no stranger to building marlin firmware.

When you build firmware like this:

define MARKFORGED_XY

define INVERT_X_DIR false

define INVERT_Y_DIR false

X moves in correct direction when operated on its own. When you move Y it moves in correct direction. But the X moves as well. The X stepper is trying to compensate. But it turning the wrong way.

When you set it up like this

define MARKFORGED_XY

define INVERT_X_DIR True

define INVERT_Y_DIR false

The X moves in the opposite direction to expected. When you move Y it goes in correct direction and the X is adequately compensated and remains still on gantry. What this is means is the printer is now effectively mirrored. When I try to home it does to wrong end of gantry.

Any Ideas? As a last resort I am considering reprinting and moving X stepper to other side of printer. My suspicion is that it will work then. Although the maths make my head spin

endorphin3d commented 11 months ago

Yes, it seems that a few users have experienced this same thing. It seems to be board-dependent as I've never had this issue. One Reddit user (u/Xyzjin) had this to say:

So the correct settings (end stops and home position in the right back corner) for the Marlin Firmware are:

define INVERT_X_DIR false

define INVERT_Y_DIR true

define INVERT_Z_DIR false

define X_HOME_DIR 1

define Y_HOME_DIR -1

define Z_HOME_DIR -1

But this also comes with one thing to mention. The x/y grid (or starting point for all movements) is in this case rotated to the left back corner instead the left front corner like in the markforged schematic. Also the printed objects are mirrored. For example letters on the top surface are now right to left and flipped 180degrees.

So I would give those home direction settings a try and report back. If you find that works for you as well, I will update the docs to include this.

powermandan commented 11 months ago

I reprinted the parts today and mirrored them to the other side.

In Marlin Inverted X

And I'm happy to report that home has moved back to the normal position and parts are not printed in mirror.

Thanks for taking the time to create this mod

SirNukalot commented 11 months ago

Yes, it seems that a few users have experienced this same thing. It seems to be board-dependent as I've never had this issue. One Reddit user (u/Xyzjin) had this to say:

So the correct settings (end stops and home position in the right back corner) for the Marlin Firmware are: define INVERT_X_DIR false define INVERT_Y_DIR true define INVERT_Z_DIR false define X_HOME_DIR 1 define Y_HOME_DIR -1 define Z_HOME_DIR -1 But this also comes with one thing to mention. The x/y grid (or starting point for all movements) is in this case rotated to the left back corner instead the left front corner like in the markforged schematic. Also the printed objects are mirrored. For example letters on the top surface are now right to left and flipped 180degrees.

So I would give those home direction settings a try and report back. If you find that works for you as well, I will update the docs to include this.

I've also think the reason behind you have to invert the X or Y is because the scematic of the MarkforgedCoreXY is not matching the Ender5 placement of the stepper-motors or the attachement points on the Y-gantry. Also the zero point in the MarkforgedCoreXY scematic is in the front left while Ender5 usually starts in the back right.

On reddit u/insanebob80r was mentioning changing the equiation for DeltaB to DeltaB=DeltaX+DeltaY on Klipper while the original MarkforgeCoreXY eqiation is DeltaX-DeltaY.

There was also a commenter who switched the belt attachment points of the x-gantry from front to back and worked around with this solution.

After some testing i found on my machine with Marlin it's the DeltaA which moved in the wrong direction. So in the Markforged scematic the Y-stepper axis is facing upright while on the Ender5 it is tilted to the left or right, so the direction of movement is switched when also looking at the attachement points of the Y-Gantry.

endorphin3d commented 11 months ago

I appreciate you sharing your findings here. I updated the docs for Klipper to change the endstop settings for correct homing:

[stepper_x]
...
position_endstop: 220
position_max: 220
...

[stepper_y]
...
position_endstop: 200
position_max: 200
...

Marlin seems to be similar but I haven't quite gathered the exact right settings from people, as I'm on Klipper myself.

powermandan commented 11 months ago

I am waiting for a klipper Pad to turn up right now. Excited to increase the speed.

What sort of speed and acceleration figures are you using?

endorphin3d commented 11 months ago

So my current bottleneck is no longer the physics of the printer but rather the rate at which my hotend can melt filament (I'm not using a volcano hotend) and the rate my part fan can cool the plastic. My acceleration is 3000 mm/s^2 and my infill speed is 120 mm/s but I'd bet can print faster than that if I upgraded my hotend and fans.

SirNukalot commented 11 months ago

So my current bottleneck is no longer the physics of the printer but rather the rate at which my hotend can melt filament (I'm not using a volcano hotend) and the rate my part fan can cool the plastic. My acceleration is 3000 mm/s^2 and my infill speed is 120 mm/s but I'd bet can print faster than that if I upgraded my hotend and fans.

Can confirm, i'm using a V6 hotend and it is now safe around 2500 mm/s^2 with wallspeed at 100 mm/s with very good printing quality and no layer shift. Beginning with 3500 mm/^2 the layer shift starts. Also tested only with 0.4 nozzle till now. But it is highly recommended to use/dial in Linear Advance and Input Shaping with marlin.

Setup:

mattswest commented 8 months ago

I've seen this issue pop up twice in the last few days in the Ender5 subreddit.

I believe some setups will require #define MARKFORGED_INVERSE to be set in their Marlin config. It seems this was added about a month ago.

This seems like it would be the solution for the issue powermandan and SirNukalot are seeing.

endorphin3d commented 8 months ago

@mattswest you're a rockstar! Thanks so much for figuring this out. As I'm not running marlin anymore, is there anyone who's able to confirm if this fix works?

mattswest commented 8 months ago

Unfortunately the PR for similar functionality on Klipper seems to have stalled out.

I checked the Discourse but it looks like no one followed through with it.

endorphin3d commented 8 months ago

Well I've never had an issue with Klipper and I think it's because of these two lines in my config:

position_endstop: 0
position_max: 220

I'll need to update the docs for that