mirror/inverse print Hello Setup: Prusa Mendel i2/sanguinololu 1.3/sprinter/slic3r Just realized my printer is printing a mirror image of everything. When looking at my printer: Y motor + endstop is in the front X motor + endstop is to the left Z motors on the top, endstop on the bottom (betting this is correct) When in the home position, the build plate is all the way to the front and all the way to the left. The home position would be where you start reading a page in a book, "top left". Is this the correct orientation that the firmware expects? The first print motion to clear the nozzle starts at the top left of the plate and zips diagonally right and "down" to the build area. This is opposite to the first layer representation in pronterface which shows the home starting at the bottom left (i.e. build plate further away from the motor) In pronterface all of the buttons to jog the axis work exactly in the directions you would expect them to. Have I built something backwards (specifically y axis)? Is this something I can correct in the firmware (and if so where)? I would like to avoid taking things apart for the 5 billionth time if possible. What do?! please be specific as possible Regards https://reprap.org/forum/read.php?1,148577,148577#msg-148577 Mon, 13 Jul 2026 09:17:23 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?1,148577,611252#msg-611252 Re: mirror/inverse print https://reprap.org/forum/read.php?1,148577,611252#msg-611252
Any ideas?]]> Holy1 General Sun, 17 Jan 2016 14:56:34 -0500 https://reprap.org/forum/read.php?1,148577,603373#msg-603373 Re: mirror/inverse print https://reprap.org/forum/read.php?1,148577,603373#msg-603373 You can also swap the two steppers over to invert an axis..

From memory (It was a while ago when I looked at this)
so if motors both turn same direction, X moves
it motors spin in opposite directions, Y moves.

To swap X and Y movement reverse direction of one motor (any one)
Just turn the stepper plug around if you can (while off!) (or re wire if needed)

In your case you say X is backwards

So you need to swap the two stepper plugs then. so your X and Y steppers plugs (for lack of a better name), get swapped over
This will invert X while Y stays the

Make sure you fix the endstops after this... before attempting to print]]> Dust General Fri, 01 Jan 2016 23:20:39 -0500 https://reprap.org/forum/read.php?1,148577,603361#msg-603361 Re: mirror/inverse print https://reprap.org/forum/read.php?1,148577,603361#msg-603361
Quote
Paul Wanamaker
The main thing is to make sure your printer is moving in the right direction. I've drawn up this diagram:



So if you command X+ the nozzle should move to the right.
If you command Y+ the printbed should move toward you.

As noted above, you can reverse the stepper wires for the motor going in the wrong direction (with power off) or change the Invert setting in firmware.

See also this thread: [forums.reprap.org]

Hmm, this seems to come up a lot, so someone with a Prusa/mendel should make a Wiki page...

Thanks for your effort, I should have mentioned that my printer is CoreXY style. Changing the stepper wires is not an option I think.
]]> Holy1 General Fri, 01 Jan 2016 22:05:08 -0500 https://reprap.org/forum/read.php?1,148577,603249#msg-603249 Re: mirror/inverse print https://reprap.org/forum/read.php?1,148577,603249#msg-603249


So if you command X+ the nozzle should move to the right.
If you command Y+ the printbed should move toward you.

As noted above, you can reverse the stepper wires for the motor going in the wrong direction (with power off) or change the Invert setting in firmware.

See also this thread: [forums.reprap.org]

Hmm, this seems to come up a lot, so someone with a Prusa/mendel should make a Wiki page...
]]> Paul Wanamaker General Fri, 01 Jan 2016 14:55:29 -0500 https://reprap.org/forum/read.php?1,148577,603134#msg-603134 Re: mirror/inverse print https://reprap.org/forum/read.php?1,148577,603134#msg-603134
Quote
kokoi
Hello,

I had the same issue with my Prusa i3 maxi. Mirrored along X axis.

The aim is to use the X endstop not as MIN endstop but as MAX endstop

What I did:
Check the config by sending M119 in pronterface.
SENDING:M119
Reporting endstop status
x_min: open
x_max: TRIGGERED
y_min: open
y_max: TRIGGERED
z_min: open
z_max: TRIGGERED

Disconnect and shutdown.

Connect the X endstop on the MAX endstop pin on the Arduino Mega board. It's just the pin connector nearby.

In Arduino config :
Invert the value of INVERT_X_DIR
and set X_HOME_DIR to 1

Power up and send the new config to the board.

Then connect Pronterface and send M119 again
SENDING:M119
Reporting endstop status
x_min: TRIGGERED
x_max: open
y_min: open
y_max: TRIGGERED
z_min: open
z_max: TRIGGERED

Now click on X home position.
It should go to the usual X home position but print X mirrored now!

Regards


Hi, did you manage to correct the mirrored x axis? I am having difficulty fixing this issue]]> Holy1 General Fri, 01 Jan 2016 08:19:50 -0500 https://reprap.org/forum/read.php?1,148577,599980#msg-599980 Re: mirror/inverse print https://reprap.org/forum/read.php?1,148577,599980#msg-599980 DjDemonD General Wed, 23 Dec 2015 05:29:34 -0500 https://reprap.org/forum/read.php?1,148577,599979#msg-599979 Re: mirror/inverse print https://reprap.org/forum/read.php?1,148577,599979#msg-599979 DjDemonD General Wed, 23 Dec 2015 05:28:33 -0500 https://reprap.org/forum/read.php?1,148577,599650#msg-599650 Re: mirror/inverse print https://reprap.org/forum/read.php?1,148577,599650#msg-599650
I had the same issue with my Prusa i3 maxi. Mirrored along X axis.

The aim is to use the X endstop not as MIN endstop but as MAX endstop

What I did:
Check the config by sending M119 in pronterface.
SENDING:M119
Reporting endstop status
x_min: open
x_max: TRIGGERED
y_min: open
y_max: TRIGGERED
z_min: open
z_max: TRIGGERED

Disconnect and shutdown.

Connect the X endstop on the MAX endstop pin on the Arduino Mega board. It's just the pin connector nearby.

In Arduino config :
Invert the value of INVERT_X_DIR
and set X_HOME_DIR to 1

Power up and send the new config to the board.

Then connect Pronterface and send M119 again
SENDING:M119
Reporting endstop status
x_min: TRIGGERED
x_max: open
y_min: open
y_max: TRIGGERED
z_min: open
z_max: TRIGGERED

Now click on X home position.
It should go to the usual X home position but print X mirrored now!

Regards]]> kokoi General Tue, 22 Dec 2015 04:28:52 -0500 https://reprap.org/forum/read.php?1,148577,477302#msg-477302 Re: mirror/inverse print https://reprap.org/forum/read.php?1,148577,477302#msg-477302 maxi.santillan General Sat, 28 Feb 2015 23:58:16 -0500 https://reprap.org/forum/read.php?1,148577,148636#msg-148636 Re: mirror/inverse print https://reprap.org/forum/read.php?1,148577,148636#msg-148636 nophead General Fri, 17 Aug 2012 02:27:53 -0400 https://reprap.org/forum/read.php?1,148577,148620#msg-148620 Re: mirror/inverse print https://reprap.org/forum/read.php?1,148577,148620#msg-148620
I was hoping tosimply make the y print opposite, the firmware settings did not do that. I trien many settings (http://www.thefrankes.com/wp/?p=2651 was one) but nothing made it work the way I wanted.
I have just reversed the pins in the wiring and put the endstop at the far side. Thank you for providing the correct orientation and all your help. I get the feeling I should have never starting building thin in my living room, I will never get to put my tools away.

Regards

TLDR for future generations:
Fix a reversed axis by reversing the pins for the motor and moving your endstop to the other side.]]> badhank General Thu, 16 Aug 2012 22:08:26 -0400 https://reprap.org/forum/read.php?1,148577,148603#msg-148603 Re: mirror/inverse print https://reprap.org/forum/read.php?1,148577,148603#msg-148603 #define INVERT_X_DIR true // for Mendel set to false, for Orca set to true
#define INVERT_Y_DIR false // for Mendel set to true, for Orca set to false
#define INVERT_Z_DIR true // for Mendel set to false, for Orca set to true]]> Polygonhell General Thu, 16 Aug 2012 18:18:20 -0400 https://reprap.org/forum/read.php?1,148577,148600#msg-148600 Re: mirror/inverse print https://reprap.org/forum/read.php?1,148577,148600#msg-148600
Edit: Polygonhell beat me to it.]]> NewPerfection General Thu, 16 Aug 2012 18:01:23 -0400 https://reprap.org/forum/read.php?1,148577,148599#msg-148599 Re: mirror/inverse print https://reprap.org/forum/read.php?1,148577,148599#msg-148599 Polygonhell General Thu, 16 Aug 2012 17:58:55 -0400 https://reprap.org/forum/read.php?1,148577,148596#msg-148596 Re: mirror/inverse print https://reprap.org/forum/read.php?1,148577,148596#msg-148596
Just to be clear on home:
"Front Left" is the position of the board relative to the machine and the nozzle is "rear left"(like starting a page in a book)?
--the alternative is that the board is "rear left" relative to the machine and the nozzle is "front left"

In regards to inverting the y axis in the firmware:
1) which variable names am I looking for, more than one in separate places or just a single variable?
2) Does this change the direction the bed will move/Do I have to move my endstop to accomodate this? Or is this an software only change that will correct the mirroring.

Regards]]> badhank General Thu, 16 Aug 2012 17:37:36 -0400 https://reprap.org/forum/read.php?1,148577,148593#msg-148593 Re: mirror/inverse print https://reprap.org/forum/read.php?1,148577,148593#msg-148593 You want to home to either front left or rear right.
The settings are in configuration.h.]]> Polygonhell General Thu, 16 Aug 2012 17:05:55 -0400 https://reprap.org/forum/read.php?1,148577,148585#msg-148585 Re: mirror/inverse print https://reprap.org/forum/read.php?1,148577,148585#msg-148585
Where might one find the settings in the firmware and what are they named? Should the y motor be in the front? Is my home position correct of should the print board be as far away from me as possible?

Regards]]> badhank General Thu, 16 Aug 2012 16:06:06 -0400 https://reprap.org/forum/read.php?1,148577,148584#msg-148584 Re: mirror/inverse print https://reprap.org/forum/read.php?1,148577,148584#msg-148584
just reverse the direction of X carriage in the firmware (you can do it hardware with wires if needed but firmware is easier)

if you then find that your X end stop is wrong you need to change that as well in the firmware

same with Y just need to do a test print

i used this to work out if i had the correct way round thingiverse 6752

as if you are the wrong way round the number 2 will print wrong]]> Enlightx General Thu, 16 Aug 2012 15:56:26 -0400 https://reprap.org/forum/read.php?1,148577,148577#msg-148577 mirror/inverse print https://reprap.org/forum/read.php?1,148577,148577#msg-148577
Setup: Prusa Mendel i2/sanguinololu 1.3/sprinter/slic3r

Just realized my printer is printing a mirror image of everything. When looking at my printer:
Y motor + endstop is in the front
X motor + endstop is to the left
Z motors on the top, endstop on the bottom (betting this is correct)

When in the home position, the build plate is all the way to the front and all the way to the left. The home position would be where you start reading a page in a book, "top left".
Is this the correct orientation that the firmware expects?
The first print motion to clear the nozzle starts at the top left of the plate and zips diagonally right and "down" to the build area. This is opposite to the first layer representation in pronterface which shows the home starting at the bottom left (i.e. build plate further away from the motor)
In pronterface all of the buttons to jog the axis work exactly in the directions you would expect them to.

Have I built something backwards (specifically y axis)? Is this something I can correct in the firmware (and if so where)? I would like to avoid taking things apart for the 5 billionth time if possible. What do?! please be specific as possible

Regards]]> badhank General Thu, 16 Aug 2012 15:24:40 -0400