It appears that @victor_larchenko's "min layer time" find is a good fix for the alternating layer speed issue, so I think this ticket can be closed.

@marcio Gracias! Will do.

@victor_larchenko I have been running a lot of tests for this issue and I wasnt seeing the increased speed but my profiles use a max of 15 s for the min layer time so this makes a lot of sense to me. I will test this out and try a repeat, thank you!!!!

Thought yall would find this interesting.
When I turned Zhop ON, the alternating layer issue stopped so I pulled both the gcodes into Meld, see bellow.

I have had the new style of Wiper pad installed on my minis, tazs and quivers (taz pro) for a while now and they work better for me than our current polyester - abs treated wiper pads. Both the hardened steel and copper nozzles have been cleaned quite well and they are both more consistently clean, still not perfect tho.
I do think it would be a good idea to have them cut to different sizes for other mounts, measurements bellow:

Taz Pro = 25mm x 90mm (x1 per wiper mount, x2 per machine)
**These are cut with the intention of them being folded long ways and inserted.

Nozzle Heat test:

@kent, I am not sure if we can get this in any different size to accommodate the cutting of it.

@kent 6 in by 9 in, so 152.4mm by 228.6mm per sheet.

@DaniAO I have replaced all my minis with this wiper pad, different thicknesses, some treated, some not. I was using them to get a broader idea of how they were working. I think it could be a good total replacement but I would need a week or so to really put it to the test and see how it cleared off the copper nozzles, probably not much of a difference I would imagine. One thing is that the size I recommend is cut for the Taz Pro wiper mount, we would either need to have different sizes OR we could use the same size and use 3 of them on the widened mini mount and 2 on the normal mini and taz mounts.

The POLYDISSOLVE (pva didn't work) treated wiper pads going around now have been soaked in a solution that was too thick and thus the pads are harder to install (my bad), I am mixing a solution right now that should be thinner. Some of the pads may have not been completely dry when I sent them around and that is probably why you have found some stuck together (also, my bad). I will have a new round ready for y'all by Wednesday morning next week, along with the measurements of the ideal solution ratio. The pads are cut 25mm by 90mm, to be folded in half when installed. This measurement is for the newer wiper mount design so they will work best if updated.

50 C for the main print temp and for the two initial print temps.

Printing temps for all profiles need to be set to 50 C, not 0 C. My bad!

That should be fine

I haven't tested all of those but the high speed settings worked without issue :) so should all be good.

MATERIAL

@marcio, yup, saw that. Thank you sir!

for my 3rd machine:
T0 was adjusted +0.40 and T1 was adjusted +0.20

I also notice that my calibration wipe (aka rewipe) for 2 of my machines seems to be falling to the right a bit, anyone else seeing this?

I am on .72, these calibrations and start code were observed for the entire process.
For one of my machines T0's bead was good but I had to adjust T1 by +0.20mm.
For the other I had to adjust T0 by +0.40mm and T1 by +0.20mm.

I have .70 on my 3 Quivers, they are all printing now.

@jebba I'll add them (PC-max and Alloy910) to the list to be supported, it may take a bit tho.

Good to know, Ill keep an eye out for issues there so I don't spend too much time on it. Gracias!

This is the list of my expected pairing tests. Some of these may not end up being supported but for now, this is the combination list I am working from. Let me know if I am missing anything or if there is anything I can toss off the list.

I flashed to ...54 firmware and the issue is no longer present.

Same here, confirmed issue on my Quivers as well.
Firmware = .68
Cura = 3.6.3

Switching the fan around (fan pulling air from above instead of bellow) does make the fan cooling more effecting. However, after further testing it has not be determined that the benefit to the fan change is worth the work that will need to go into it happening. The decision R&D has come to is to keep the original fan orientation.

I have already put it on my quivers and am trying to determine its ability to grab material, I also gave some to MER, look for updates soon.

SECOND TEST OF Non-Scratch Wiper Pad
This test was done with the pad placed into the wiper mount 'dome up', see picture.
NOTE: The Same Nozzle was used for both Non-Scratch Pad Tests.

In the new start code I upped the 2nd nozzles extrusion by 5mm, nozzle 1 should be purging 15mm and nozzle 2 should be purging 20mm. However, I also still see the 2nd nozzle purge less and if it goes directly from ending one print to starting the next, the amount the 2nd nozzle purges is even less! You only get about 7 mm coming out of the hot end, not even enough for the bed movement to sheer off. @matth, I am with you on this, not sure what is going on there.

Non-Scratch Results:
I used the original Wiper Pad Testing Gcode.

Almost, I was seeing it a little slower on mine but not by much.

I'll get a wipe code up Monday.

My Quiver start Gcode:

This happened to me as well, x1 is fine, any larger number crashes, here is my terminal crash info:

Leather Results from initial testing:

having multiple colors are a good idea, at least 2 and they should be different colors, black and green?
What will the sample sections of filament be packaged in, resistant to moisture?

@logan, Ill cut the next wiper pad batch I make to a double fold able width and have some passed around on Monday

@logan I chose not to load mine in that way because it shreds the pad pulling the nozzle along the closed web weave but if it works better that way it seems worth it. Only issue is the life of that pad, no objection from me. I did double up my pads tho so that the pad is a bit more dense, that could be part of the improvement for us both.

@logan, which grade of scotch bright were you testing and do you have any pictures you could post to show what you mean?

@logan, Did you document all the different settings you tried? or better yet, did you export your test profiles?

Profiles need work and I have been slow to get out a confirmed profile, Ill let you know if I can improve this through settings and Ill get it to you to test in comparison asap.

@kent, This work?

@kent, Is this pad attached to a sponge?

@tutley where can I find a strip of leather that could be conditioned for this kind of use? I will test the suggested ideas the same as my other tests to compare.

I like these ones the best for what we need so I am testing them with some polydissolve wash to aid in the material sticking. Right now this wiper clears the nozzle tip great but it doesn't trap the material, just roles it to the back of the nozzle.

WIPER PAD = #7448

WIPER PAD = #8447

WIPER PAD = #7440

WIPER PAD = #7446

Some updates here: T4922

So, the fan working better doesn't solve the PLA poor printing problem BUT in my testing I did determine that the fan does work more effectively if it is pulling air from above the tool head instead of near the bed.

@logan, possibly, that is what I am testing now. Ill let yall know how it goes

@kent and @logan, I have ordered more of the pads. While they work great at clearing the tip of the nozzle and no fibers come off it, it does not trap the material, globs end up just on the side of the nozzle. This makes for passing probes but, obviously, still an issue. So I am dissolving some Polydissolve into water to make a thin paste to coat the new kind of pad with this. Ill pass around the new pads when I get them and Ill let yall know how the polydissolve turns out.

All imported profiles look good to me. I think we can close this now.

Should we make a new ticket for the Bridge profile edits (coming soon) or use this same branch but keep it open for when those edits come?

aww shucks!

Updated Dual V3 Polylite PLA Profiles, these will be incorporated soon.

;This profile is designed specifically for LulzBot TAZ6 Flexy Dually 3D Printer
;{material_print_temperature}
G26 ; clear potential 'probe fail' condition
G21 ; set units to Millimetres
M107 ; disable fans
G90 ; absolute positioning
T0 ; select this extruder first
M82 ; set extruder to absolute mode
G92 E0 ; set extruder position to 0
M140 S{material_bed_temperature}; get bed heating up
M104 S{material_soften_temperature_0} T0 ; set T0 to soften temp
M109 S{material_soften_temperature_1} T1 ; soften filament and wait
M109 S{material_soften_temperature_0} T0 ; soften filament and wait
G28 X Y ; home X and Y
G1 X-19 Y258 ; move over the Z_MIN switch
M104 S{material_wipe_temperature_0} T0 ; set T0 to wipe temp
M109 S{material_wipe_temperature_1} T1 ; wait for T1 to reach temp
M109 S{material_wipe_temperature_0} T0 ; wait for T0 to reach temp
G28 Z ; home Z
G1 E-15 F100 ; suck up XXmm of filament
T1 ; switch extruders
M82 ; set extruder to absolute mode
G92 E0 ; set E to 0
G1 E-15 F100 ; suck up filament
T0 ; switch extruders
G92 E-15 ; adjust E value
G1 X-17 Y100 F3000 ; move above wiper pad
G1 Z1 ; push nozzle into wiper
G1 X-19 Y95 F1000 ; slow wipe
G1 X-17 Y90 F1000 ; slow wipe
G1 X-19 Y85 F1000 ; slow wipe
G1 X-17 Y90 F1000 ; slow wipe
G1 X-19 Y80 F1000 ; slow wipe
G1 X-17 Y95 F1000 ; slow wipe
G1 X-19 Y75 F2000 ; fast wipe
G1 X-17 Y85 F2000 ; fast wipe
G1 X-19 Y80 F2000 ; fast wipe
G1 X-17 Y70 F2000 ; fast wipe
G1 X-19 Y75 F2000 ; fast wipe
G1 X-17 Y95 F1000 ; slow wipe
G1 X-19 Y90 F1000 ; slow wipe
G1 X-17 Y85 F1000 ; slow wipe
G1 X-19 Y90 F1000 ; slow wipe
G1 X-17 Y80 F1000 ; slow wipe
G1 X-19 Y95 F1000 ; slow wipe
G1 X-17 Y75 F2000 ; fast wipe
G1 X-19 Y85 F2000 ; fast wipe
G1 X-17 Y80 F2000 ; fast wipe
G1 X-19 Y90 F2000 ; fast wipe
G1 X-17 Y85 F2000 ; fast wipe
G1 Z10 ; raise extruder
M109 S{material_probe_temperature_0} ; heat to probe temp
G1 X-9 Y-9 ; move above first probe point
M204 S100 ; set accel for probing
G29 ; probe sequence (for auto-leveling)
M204 S500 ; set accel back to normal
G1 X0 Y0 Z15 F5000 ; get out the way
M400 ; clear buffer
M140 S{material_bed_temperature}; get bed heating up
M104 S{material_print_temperature_0} T0 ; set extruder temp
M109 S{material_print_temperature_1} T1; set extruder temp
M109 S{material_print_temperature_0} T0 ; set extruder temp and wait
T1 ; switch to second extruder
G1 E0 F100 ; prime nozzle from previous print
G1 F100 E-{retraction_amount} ;retract second nozzle before print
G92 E0 ; adjust to 1st nozzle e value
T0 ; switch back to back
M190 S{material_bed_temperature_layer_0}; get bed temping up during first layer
G1 Z2 E0 F75 ; extrude filament back into nozzle
M117 TAZ Printing... ; LCD status message

; This profile is designed specifically for LulzBot TAZ6 3D Printer with the Dual V3 toolhead
M75 ; start GLCD timer
G26 ; clear potential 'probe fail' condition
G21 ; set units to Millimetres
M107 ; disable fans
M420 S0 ; disable leveling matrix
G90 ; absolute positioning
M104 S{material_soften_temperature_0} T0 ; soften filament
M104 S{material_soften_temperature_1} T1 ; soften filament
G28 X Y ; home X and Y
G1 X-17 F3000 ; clear X endstop
G1 Y258 F3000 ; move over the Z_MIN switch
G1 X-19 F3000 ; move left as far as possible
M117 Heating... ; LCD status message
M104 S{material_soften_temperature_0} T0 ; wait for temp
M109 S{material_soften_temperature_1} T1 ; wait for temp
T0 ; return to first extruder
G28 Z ; home Z
T0 ; select this extruder first
G90 ; set extruder to absolute mode
G92 E0 ; set extruder to zero
G1 E-10 F100 ; retract XXmm of filament
T1 ; switch extruders
G90 ; set extruder to absolute mode
G92 E0 ; set extruder to zero
G1 E-10 F100 ; retract XXmm of filament
M104 S{material_wipe_temperature_0} T0 ; set to wipe temp
M104 S{material_wipe_temperature_1} T1 ; set to wipe temp
M106 ; Turn on fans to speed cooling
G1 X-18 Y98 F3000 ; move above wiper pad
M117 Cooling... ; LCD status message
M104 S{material_wipe_temperature_0} T0 ; set extruder temp
M109 S{material_wipe_temperature_1} T1 ; set and wait for extruder to reach temp
M107 ; Turn off fan
T0 ; switch extruders
G1 Z0.5 ; push nozzle into wiper
G1 X -19 Y95 F1000 ; slow wipe
G1 X -19 Y90 F1000 ; slow wipe
G1 X -19 Y85 F1000 ; slow wipe
G1 X -18 Y90 F1000 ; slow wipe
G1 X -19 Y80 F1000 ; slow wipe
G1 X -18 Y95 F1000 ; slow wipe
G1 X -19 Y75 F2000 ; fast wipe
G1 X -18 Y65 F2000 ; fast wipe
G1 X -19 Y70 F2000 ; fast wipe
G1 X -18 Y60 F2000 ; fast wipe
G1 X -19 Y55 F2000 ; fast wipe
G1 X -18 Y50 F2000 ; fast wipe
G1 X -19 Y40 F2000 ; fast wipe
G1 X -18 Y45 F2000 ; fast wipe
G1 X -19 Y35 F2000 ; fast wipe
G1 X -18 Y40 F2000 ; fast wipe
G1 X -19 Y70 F2000 ; fast wipe
G1 X -18 Y30 Z2 F2000 ; fast wipe
G1 X -19 Y35 F2000 ; fast wipe
G1 X -18 Y25 F2000 ; fast wipe
G1 X -19 Y30 F2000 ; fast wipe
G1 X -18 Y25 Z1.5 F1000 ; slow wipe
G1 X -19 Y23 F1000 ; slow wipe
G1 X -18 Z15 ; raise extruder
M140 S{material_bed_temperature} ; get bed heating up
T0 ; select this extruder
M104 S{material_probe_temperature_0} ; heat to probe temp
T1 ; select this extruder
M109 S{material_probe_temperature_0} ; heat to probe temp and wait
T0 ; select this extruder
M204 S100 ; set accel for probing
G29 ; probe sequence (for auto-leveling)
M420 S1 ; enable leveling matrix
M425 Z ; use measured Z backlash for compensation
M425 Z F0 ; turn off measured Z backlash compensation. (if activated in the quality settings, this command will automatically be ignored)
M204 S500 ; set accel back to normal
M104 S{material_print_temperature_0} T0 ; set extruder temp
M104 S{material_print_temperature_1} T1 ; set extruder temp and wait
G1 X100 Y-25 Z0.5 F3000 ; move to open space
M400 ; clear buffer
M117 Heating... ; LCD status message
M109 S{material_print_temperature_0} T0 ; set extruder temp
M109 S{material_print_temperature_1} T1 ; set extruder temp and wait
M117 Purging... ; LCD status message
T0 ; select this extruder first
G1 E0 F100 ; undo retraction
G92 E-20 ; set extruder negative amount to purge
G1 E0 F100 ; purge XXmm of filament
G1 E-5 F100 ; retraction
T1 ; switch to second extruder
G1 E0 F100 ; undo retraction
G92 E-25 ; set extruder negative amount to purge
G1 E0 F100 ; purge XXmm of filament
G1 E-5 F100 ; retraction
G1 Z0.5 ; clear bed (barely)
G1 X100 Y0 F5000 ; move above bed to shear off filament
T0 ; switch to first extruder
M190 S{material_bed_temperature_layer_0} ; get bed temping up during first layer
G1 Z2 E0 F75 ;
M400 ; clear buffer
M117 TAZ Printing... ; LCD status message

I have been taking this into consideration for all new profiles and for all edits coming my way, as far as making a mass change I am unsure, @karrad, any thoughts? I don't anticipate major issues if we approve this change for all profiles but as for a quick fix it might be an issue, each profile will have a different layer height and thus a different layer to activate the fan.

We determined that the main culprit of drastic temp drops was low layer fan activation, this causes the air from the fan to hit the bed and reflect back up onto the heater block, after a few more layers there is a large enough gap between toolhead and bed that the air will flow outward. To fix you can increase your "Regular Fan Speed At Layer", this will give the printer a longer time for the fan to ramp up to the regular fan speed setting.

@karrad hmmm. Interesting, Does Cura Turn off Retration when using combing? this is new info to me, I can start incorporating this (provided it works) into the Quiver Profiles.

Ah, good to know. Ill keep this open for future triage :)

@karrad and @adam, is this an old ticket? I think we have already migrated it to supported. Just double checking before I close this.

okydoky, sounds good.