Dual Extruder Not Acting Right in SImplify

[zemlin]

Nothing jumps out at me on that list.

[chiefburningrubber]

Back to my original problem at the beginning of the post.

In the starting scripts, there is some changing of tooling that happens (T0, T1, etc) and when I zero out the switching of the Tools in the starting script, the banging stops. It'll move off the bed, but the left extruder will purge onto the build plate because I think the tooling offset was removed during homing.

I reloaded the Simplify profile a few times for the M2 Dual and even reinstalled Simplify to see if that took it away.

Tech support hasn't been much help. They tell me this is the first time they've seen this problem with little communication.

[chiefburningrubber]

Jules, regarding your link to the setup of duals. I read that before I posted. And, my settings look pretty close.

I didn't understand the comment about DO NOT use autoconfigure. Not sure where you are referring to in the Simplify software. I did check "Auto" for width on the first tab which made the width to .42mm but can't see how that has an effect?

[Jules]

If you use the auto-configuration settings to switch from PLA to PETG for example, it changes some things but not others. (That is only for those profiles that I did by the way....if you want to use Auto-Configure for the default profile that comes in S3D, go right ahead.)

The Auto-set button that you selected to set the width isn't going to hurt anything....I'm talking about the ones at the top of the page. Auto-Configure for Material, Print Quality, Extruders.

(By the way, you're supposed to download those profiles to your desktop and then unzip them and install them directly into S3D (File > Import FFF profile) .....they shouldn't be close - they should be exact. Those have special starting and ending scripts optimized for the Dual Machines, that depend on which nozzle is in use at the time.)

If you want to save your current settings, you can export a copy of the FFF file to your desktop and reload it later if you don't want to over-write the default....then you can install a couple of the profiles above and try them out.

[chiefburningrubber]

Thanks for all the help on this. I think there's more wrong than what it looks to be. Josh had me change my starting script to this:

M108 S255 ; Turn on M2 fans
T0 ; GGS CHANGED TO LEFT EXTRUDER switch to right extruder offsets for homing
G28 ; home all axes
; GGS COMMENTED OUT T0 ; switch to left extruder
G1 X0 Y50 Z0.3 F3600 ; Move forward to avoid binder clips
G1 X209 Z10 F3600 ; Move off platform
G1 Z0.4 ; Position nozzle above buildplate
G92 E0 ; Zero extruder
G1 E25 F225 ; Purge left extruder
G92 E0 ; Zero extruder
G1 X160 Z0.1 E1.0 F1200 ; Slow wipe
G1 X140 Z0.25 ; Lift


It stopped banging but still isn't printing right. I tried your fff files and some of them worked great. Another problem I've been having - and it seems to happen in this order: Something goes wrong either it bangs off the end, or I accidentally loaded the original profile (or yours with the T1, T0) then the temps don't update right, the speeds just change from some max speed to what I set in simplify (way weird!) and just starts acting stupid until I shut it down and unplug it. Then it seems to be ok.

One other thing to note, is that the build plate shows shortened on both sides although when I place it within the grid on the left (understood this is supposed to be because of my T1 offset) it prints right to the build plate and now bangs the zero stop. This is on the right extruder.

With your code, it printed great - I made some nice parts with PETG but still banging off the Xmax when moving for a purge.

I just don't get it.

[zemlin]

Here is my start script - based on Jules' dual setup for RevE machines. I use the same script regardless of which nozzle (or both) that I'm running. The cold nozzle won't try to purge.
On the 'Move off platform' step, I see your X value is 209 where I move to 200.

M108 S255 ; turn on M2 extruder fan
T1 ; switch to right extruder offsets for homing
G28 ; home all axes
G28 ; home all axes
T0 ; switch to left extruder
G1 X200 Y50 Z10 F9600 ; Move off platform
G1 Z0.4 ; Position nozzle above buildplate
G92 E0 ; zero extruder
G1 E60 F225 ; purge left nozzle
G92 E0 ; zero extruder
T1 ; Switch to right extruder
G92 E0 ; zero extruder
G1 E60 F225 ; purge right nozzle
G92 E0 ; zero extruder
G1 X190 Z0.02 E1.0 F600 ; slow wipe left nozzle
G1 Y40 ; y axis shift
T1 ; right extruder
G1 X130 Z0.02 E1.0 F600 ; slow wipe
G1 Z0.25 ; lift
T0 ; left extruder

[Jules]

Yeah, try Zemlin's suggestion for modifying the X travel distance. That should take care of the banging.

If it works....remember that you have to modify the starting script in every single profile you use - it's not information that gets saved anywhere by S3D.

[chiefburningrubber]

It was set at 200 originally and we (Josh and I) changed it yesterday. The banging is farther out than that.

But now that I'm homing off the T0 coordinates which is not like anyone else's script it seems, 200 let's it purge onto the bed.

[Phil]

Well, we finally figured out the problem with my dual extruder...My knob was too big!
Seriously, it turns out the Z-axis knob was pinned against wire harnesses when the carriage was at minimum X-axis travel. Several ways to fix this, including just removing the knob, so all is now well.
Many thanks to Michael at MG Tech Support, who was most helpful in solving this baffling problem.

[Jules]

ROFL! I could make a rude comment....but I won't! Congrats on it being a simple issue!