Resume print after color change in vase mode issue

mrac1

I'm using the macro below for color changes with S3D on my delta. Works perfect, except in vase mode. In vase mode, after the filament is changed, the effector moves realy slow back to the print and don't starts at the correct z-height. Where did i make a mistake?

M400 ; Wait for moves to complete
G1 E-2 F3600 ; retract 2mm of filament
G91 ; relative positioning
G1 Z50 F3000 ; lift Z by 50mm
G90 ; absolute positioning
G1 X0 Y-160 F6000 ; Move nozzle to the front
G92 E0; Reset extruder
G1 E-30 F300 ; Retract 20mm of filament at 300mm/min
G1 E-200 F3000 ; Retract 480mm of filament at 3000mm/min
G92 E0; Reset extruder again
M291 P"Insert filament, klick OK when ready" R"Color change" S3 T0 ; Display message
G92 E0; reset extruder
G1 E25 F600 ; Feed 25mm of filament at 600mm/min
G1 E125 F3000 ; Feed 125mm of filament at 3000mm/min
G1 E100 F300 ; Feed 100mm of filament at 300mm/min
G4 P1000 ; Wait one second
G92 E0; reset extruder again
M291 P"Clean the nozzle and press OK" R"Color change" S3 T0 ; Display message
G1 R1 Z50 F6000 ; go to 50mm above position of the last print move
G1 R1 ; go back to the last print move
M83 ; relative extruder moves

dc42

How do you invoke that macro?

mrac1

Within the post processing in S3D, and this command:

{REPLACE "; process color2" "M98 P/macros/color change"}
{REPLACE "; process color3" "M98 P/macros/color change"}
…

I rename the processes for the color change accordingly

dc42

I think the problem is no pause command is being issued, so the paused coordinates needed by the G1 R1 commands at the end are undefined.

mrac1

Now I've tried it with M226, but this doesn't solve the problem. But I've seen, the z-height ist correct, it's just to slow and the filament is ozzing out while traveling (takes about 5sec).
The weird thing is, without vase mode, it works really nice.

dc42

Without vase mode, my guess is that the slicer is inserting a move to the correct XYZ position immediately after that comment you are replacing and the associated tool change.

mrac1

This is the gcode in normal mode:

G1 X-8.710 Y11.054 E0.0291
G1 X-9.300 Y10.635 E0.0291
G1 X-9.623 Y10.357 E0.0171
G1 X-9.850 Y10.161 F1019
G1 E-1.6000 F2100
G1 Z5.250 F15000
M98 P/macros/color change
; layer 21, Z = 5.200
M104 S215 T0
M140 S60
M106 S224
G1 X-9.855 Y10.156 F18000
G1 Z5.200 F15000
G1 E1.6000 F2100
G1 X-10.158 Y9.854 E0.0172 F1019
G1 X-10.399 Y9.587 E0.0144
G1 X-10.808 Y9.069 E0.0265

and in vase mode:

G1 X-8.710 Y11.054 Z4.944 E0.0291
G1 X-9.300 Y10.635 Z4.946 E0.0291
G1 X-9.850 Y10.161 Z4.948 E0.0291
M98 P/macros/color change
; layer 21, Z = 5.200
M104 S215 T0
M140 S60
M106 S224
G1 X-10.158 Y9.854 Z4.950 E0.0175 F1019
G1 X-10.399 Y9.587 Z4.951 E0.0144
G1 X-10.808 Y9.069 Z4.952 E0.0265

Maybe you find something what's going wrong.

dc42

So in normal mode you have this:

M98 P/macros/color change
; layer 21, Z = 5.200
M104 S215 T0
M140 S60
M106 S224
G1 X-9.855 Y10.156 F18000
G1 Z5.200 F15000
G1 E1.6000 F2100
G1 X-10.158 Y9.854 E0.0172 F1019

After the tool change it sets XY and then Z to the required position before it does any extrusion. In vase mode it does this:

M98 P/macros/color change
; layer 21, Z = 5.200
M104 S215 T0
M140 S60
M106 S224
G1 X-10.158 Y9.854 Z4.950 E0.0175 F1019

It doesn't reset the position before extruding again.

mrac1

In normal mode, it's the startpoint of the next layer, in vase mode, there ist no startpoint, because there ist no endpoint from the last layer. Any suggestions how I could solve this?

dc42

I am implementing the G60 command in firmware 1.21RC3. I think using this will solve your problem.

mrac1

Thank you very much David!

mrac1

Unfortunately, nothing has changed. G60 S0 saves the current position and with G1 R0 the nozzle is going back to the saved position. But I do not think that's the problem. The position is simply approached very slowly. And as I said, the strange thing is, it only happens in vase mode. Otherwise the movement is normal fast.
From these lines, it is slow:
G1 R1 Z50 F6000 ; go to 50mm above position of the last print move
G1 R1 ; go back to the last print move
Then it goes on normally.

dc42

G1 R0 does nothing at all because only axes that are mentioned are moved. Use these lines instead:

G1 R0 X0 Y0 Z50 F6000
G1 R0 X0 Y0 Z0

I don't know why you use Z50, I use Z2 for this sort of thing.

mrac1

The 50mm are only for the test so that there is more room for the extruded filament when changing. I'll try your suggestion later, I'm curious if this affects the travel speed.

mrac1

You where right! Travel speed is now fast again! Thank you!