Did the prime line always go right to left?  

RE: Did the prime line always go right to left?

The slicer is the one that is adding the prime line, not the printer's firmware itself. Something has changed to cause your generated gcode to print the prime line in the other direction and I can't think of anything obvious that might be. What happens when you print one of the known-good pregenerated gcode files that came with the printer (or you can re-download from Prusa's site)? Does it also prime "in the wrong direction"? If so, my best guess would be your X motor cables are backwards and your prints are getting mirrored in that direction, not just the prime line.

Print one of the known-good gcodes like the Prusa logo and you'll check both things at once - if the priming happens in the right direction, and if the text on the printed object is mirrored or not.

RE: Did the prime line always go right to left?

Posted by: @with_maltodextrin

The slicer is the one that is adding the prime line, not the printer's firmware itself. Something has changed to cause your generated gcode to print the prime line in the other direction and I can't think of anything obvious that might be. What happens when you print one of the known-good pregenerated gcode files that came with the printer (or you can re-download from Prusa's site)? Does it also prime "in the wrong direction"? If so, my best guess would be your X motor cables are backwards and your prints are getting mirrored in that direction, not just the prime line.

Print one of the known-good gcodes like the Prusa logo and you'll check both things at once - if the priming happens in the right direction, and if the text on the printed object is mirrored or not.

If there was anything wrong with the printer my bed would be inverted.. So if I printed something on the right, it would come out on the left.. And visa versa.. So the bed isn't "mirrored".. its just laying the prime line down opposite to the MK3 (And what I remember on the Mini).

There is no issue with this... But I just wondered how and when this started. 

RE: Did the prime line always go right to left?

I just generated 2xGCODE.. One for the Mk3 and one for the Mini.. Then I opened it with a visualiser ( https://ncviewer.com/). The Mk3 does the prime line left to right.. And the mini right to left... So this is something that Slicer is doing and I assume its intentional (and I wonder if its got something to do with the preview data thats added at the start of the GCODE file)

I have gone back to some of the early GCODE and I generated for the Mini and its the same, so I assume its always been like this.

RE: Did the prime line always go right to left?

Each printer keeps it's individuality 😉 

RE: Did the prime line always go right to left?

PrusaSlicer and most slicers embed the settings in the generated gcode. You can always open that up and look for the start_gcode lines. It's relatively easy to customize the routine, and I've copied my Mk3 prime line troutine to a Sidewinder printer that originally used a very different 2 line pattern for the prime line. 

RE: Did the prime line always go right to left?

Can i just say again, this isnt an issue... nothing needs to be fixed.. i have verified its doing what Slic3r is telling it to do.

All i am asking is whether the Mini has always been like this as i was 100% sure that it used to print left to right Like the MK3 but now i am not so sure.. 

RE: Did the prime line always go right to left?

My Mini has always done the prime right to left.  Sometimes the mind plays tricks 🙂

RE: Did the prime line always go right to left?

Posted by: @jweaver

[...] All i am asking is whether the Mini has always been like this as i was 100% sure that it used to print left to right Like the MK3 but now i am not so sure.. 

Just check your slicer settings for however many versions you want to go back to verify if this is really something you're concerned about. PrusaSlicer maintains backups of config settings, or you can download older versions. Otherwise, be secure in the knowledge that others have said it's been that way and just enjoy printing.

RE: Did the prime line always go right to left?

Posted by: @bobstro

Posted by: @jweaver

[...] All i am asking is whether the Mini has always been like this as i was 100% sure that it used to print left to right Like the MK3 but now i am not so sure.. 

Just check your slicer settings for however many versions you want to go back to verify if this is really something you're concerned about. PrusaSlicer maintains backups of config settings, or you can download older versions. Otherwise, be secure in the knowledge that others have said it's been that way and just enjoy printing.

As I said.. I didn't ask this out of concern.. I just wanted to know if my mind was playing tricks on me as I was sure it used to go Left to Right like my Mk3.

But I am not in any way concerned... And I have now looked back at some of the GCODE files I created on day one and the line goes Right to left.. SO its normal and its confirmed I am loosing my mind.

Its odd though that if you slice something for the MK3, and then (using the same settings) do the same for the Mini, the prime line is drawn in different directions.. Its clearly intentional and there must be some logic to this, but I can't work out what it might be.

Jon

RE: Did the prime line always go right to left?

@jweaver

Sorry - I didn't see that this was in the Mini forum, and interpreted the question as regarding your MK3/S which I knew did left to right. Disregard my entire post as you've already found. 🙂

RE: Did the prime line always go right to left?

Posted by: @jweaver

But I am not in any way concerned... And I have now looked back at some of the GCODE files I created on day one and the line goes Right to left.. SO its normal and its confirmed I am loosing my mind.

Hey, if you're not losing your mind these days, there's something wrong with you! I'm just passing on info that I've picked up over the years. Since acquiring a 2nd (non-Prusa) printer, I'm keenly aware of some of these issues.

Its odd though that if you slice something for the MK3, and then (using the same settings) do the same for the Mini, the prime line is drawn in different directions.. Its clearly intentional and there must be some logic to this, but I can't work out what it might be.

The specific reason is that startup gcode is part of the printer profile in PrusaSlicer. For whatever reason, whoever put the Prusa Mini gcode together in the profile they provide decided to move the prime line right-to-left. They also added the 2-step filament warmup with initial 170C filament temps to the Mini startup gcode but not the latest Mk3 startup gcode. Again, I have no idea why.

It's always a bit of a surprise when I print using somebody elses profiles, or using another slicer and don't see my expected startup routine. I've spent way too much time getting my startup gcode as similar as possible between PrusaSlicer, Cura, Simplify 3D and ideaMaker for both my Mk3 and 2nd printer. It's funny how we can get so personally invested in some of these things.

RE: Did the prime line always go right to left?

IIRC only First Layer Calibration Wizard routine does the priming line left to right, at least it did as I remember.