Hi,
I am having a problem with the right extruding priming like crazy (maybe 7 seconds) when it it starts its first pass on the ooze shield or pillar. It puts out a big blob and carries on. It does this every layer after too. The left extruder behaves normally.
All the settings are the same for each extruder. I am using the dual wizard.
Any words of wisdom?
here is the fff
Re: Right extruder problem
You have 2 processes that have different settings for things like the normal retraction, tool change retractions, and several other things. When you try to combine the gcode from those 2 processes, that's definitely going to create problems since half your build is thinking you want settings A and the other half is trying to produce settings B.
So the solution is that you need to make sure that both processes have the same settings for the Extruders tab, and then also the tool change retraction section on the Advanced tab. Then you can correctly combine them.
The dual extrusion wizard that S3D included does this for you automatically, but it looks like you setup these processes on your own.
So the solution is that you need to make sure that both processes have the same settings for the Extruders tab, and then also the tool change retraction section on the Advanced tab. Then you can correctly combine them.
The dual extrusion wizard that S3D included does this for you automatically, but it looks like you setup these processes on your own.
Re: Right extruder problem
JoeJ wrote:
So the solution is that you need to make sure that both processes have the same settings for the Extruders tab, and then also the tool change retraction section on the Advanced tab. Then you can correctly combine them.
The dual extrusion wizard that S3D included does this for you automatically, but it looks like you setup these processes on your own.
Thanks Joe, I did not know they had to be identical. I will make them the same and give it a go. The reason they are a bit different is because I am using a geared extruder and direct extruder (both with a bowden tube) . This is on home built machine so I was using what I had. I set up each extruder to work and print cleanly by themselves and then figured they would behave the same when combined in the dual extrusion wizard.
Re: Right extruder problem
Just to clarify, there is nothing wrong with giving your 2 extruders different retraction settings. For example, on the Extruders tab of your FFF settings, it's fine if you click on the "Right Extruder" on the left-hand list and it has different retraction settings than if you click on the "Right Extruder". So if you would have setup a profile this way and then clicked "Update Profile" to save it, that would be fine. You could then use the dual extrusion wizard and select that profile and it would be perfect.
The issue is that you created 2 processes with DIFFERENT settings for the these same extruders. Your "Color 1" process had the right extruder retraction distance set to 8.25mm and the left extruder set to 8.25mm as well. But your "Color 2" process had the right extruder retraction distance set to 4mm and the left also set to 4mm. So that definitely won't work if you try to use it for dual extrusion. Perhaps you intended to set the right extruder to 8.25mm in BOTH processes and then the left extruder to 4mm in both processes?
The S3D dual extrusion wizard actually automatically creates a process group to try to stop your from making these mistakes. Watch the 2 videos below if you don't know what that does.
https://www.youtube.com/watch?v=EbQfifnzL4Q
https://www.youtube.com/watch?v=qPufaJhyqME
So they've made it about as easy as possible to do things correctly. But of course, if you ungroup the processes and then start changing things yourself, it's definitely possible to end up with a configuration like the factory file you posted.
The issue is that you created 2 processes with DIFFERENT settings for the these same extruders. Your "Color 1" process had the right extruder retraction distance set to 8.25mm and the left extruder set to 8.25mm as well. But your "Color 2" process had the right extruder retraction distance set to 4mm and the left also set to 4mm. So that definitely won't work if you try to use it for dual extrusion. Perhaps you intended to set the right extruder to 8.25mm in BOTH processes and then the left extruder to 4mm in both processes?
The S3D dual extrusion wizard actually automatically creates a process group to try to stop your from making these mistakes. Watch the 2 videos below if you don't know what that does.
https://www.youtube.com/watch?v=EbQfifnzL4Q
https://www.youtube.com/watch?v=qPufaJhyqME
So they've made it about as easy as possible to do things correctly. But of course, if you ungroup the processes and then start changing things yourself, it's definitely possible to end up with a configuration like the factory file you posted.
Re: Right extruder problem
Ok, I have made sure the extruder setting are the same with exception to the retraction speed of the right extruder. I did this before saving the profile and then used the dual extruder wizard.
It still tries to prime after the first pass of the ooz sheild. ( starting layer 3). What I did notice is the retraction is 10mm (as stated in the advanced tab tool change retraction) however the restart seems much longer . Like |I said it primes for a good 6-7 seconds, leaves a big blob and the continues to do the rest of the shield, has a normal retraction then continues to print the part. It definitely tries to put more out then what it retracted.
If I set the retraction ( in the advanced tab, tool change retraction) to 0 or 1 or 2 it does blob less but it makes a mess.
here is the lastest fff
It still tries to prime after the first pass of the ooz sheild. ( starting layer 3). What I did notice is the retraction is 10mm (as stated in the advanced tab tool change retraction) however the restart seems much longer . Like |I said it primes for a good 6-7 seconds, leaves a big blob and the continues to do the rest of the shield, has a normal retraction then continues to print the part. It definitely tries to put more out then what it retracted.
If I set the retraction ( in the advanced tab, tool change retraction) to 0 or 1 or 2 it does blob less but it makes a mess.
here is the lastest fff
Re: Right extruder problem
I just dug through the entire gcode file that is generated from the factory file you posted. For normal retractions, the gcode is properly retracting 8.25mm and then also priming 8.25mm. This matches the settings on the Extruders tab, since you have that retraction distance setup for both extruders and your extra restart distance is zero. For the tool change retractions, the gcode is correctly retracting 10mm and then priming only 9.5mm, since you have a -0.5mm tool change extra restart distance. So after looking through the file extensively, it appears to be 100% correct based on the settings you defined.
Just so you know, it usually doesn't prime on the very first tool change since that extruder didn't already have a tool change retraction. It's was just primed in the starting script, so the full retract/primes won't start till the 3rd layer or so. That is normal and if it wasn't this way you would definitely see problems!
So to summarize, everything looks like it's working exactly as it should based on the settings you have. So if you are seeing it prime too much when it switches tools, then just change your tool change extra restart distance. For example, if you made your tool change extra restart distance -1.5mm, then you would only prime 8.5mm after a tool change instead of 9.5mm.
Just so you know, it usually doesn't prime on the very first tool change since that extruder didn't already have a tool change retraction. It's was just primed in the starting script, so the full retract/primes won't start till the 3rd layer or so. That is normal and if it wasn't this way you would definitely see problems!
So to summarize, everything looks like it's working exactly as it should based on the settings you have. So if you are seeing it prime too much when it switches tools, then just change your tool change extra restart distance. For example, if you made your tool change extra restart distance -1.5mm, then you would only prime 8.5mm after a tool change instead of 9.5mm.
Re: Right extruder problem
I thought the code looked good too. I have been puzzling my puzzler and have the " glitch". I am using a geared extruder and a direct drive extruder. The geared extruder is set to 760 steps and the direct drive is set to 91 steps in the firmware. When the right extruder (direct drive) tool head retraction primes it is using the 760 value. This is why it pumps out so much. It behaves normally for printing and retracting just messes up on the tool head retraction restart prime.
Re: Right extruder problem
The commands in the gcode are correct. It is telling each extruder to retract the proper amount of filament.
That being said, your firmware still has to interpret those commands. If there is an issue with the steps/mm values, then you need to fix that on the firmware. That has nothing to do with the software.
That being said, your firmware still has to interpret those commands. If there is an issue with the steps/mm values, then you need to fix that on the firmware. That has nothing to do with the software.
Re: Right extruder problem
Oh yes, I totally figured it is in the firmware. I am using repetier 92.3 , the latest. I am just glad I eliminated the software as the source of the problem. Not sure how to proceed. I may just make another geared extruder and that should solve it.
