Dual Extruder: lower temp while extruder is parked

googliola

I finally got my independent dual x printer up and running with repetier. Apart from setting up BLTouch correctly, the trickiest part was to realize that the offsets are very different from what you do in MK4Duo / Marlin. But now I got it calibrated perfectly.

This is almost a cosmetic question: is there an easy way to set temp to e.g. 170 while the extruder is parked and then heat up to target temperature once it gets re-activated. The extruder select / deselect command only offer hard coded temp-settings which is not practical, maybe I could use the event system (requires coding, not too confident about that). Last, I might be able to find a way via slicer settings or via events in Repetier-Server. Is there an even easier way I am not currently aware off?

Thanks a lot for your support in advance. I am suuuuper happy right now (even got the RADDS2LCD set up with a 12864 LCD, yeeeeah)

Repetier

I think slic3r has already an option for this. You definitively want this handled in slicer or a slicer postprocessor. For CuraEngine there is a sloution in recent discussions, only a few days ago.

googliola

Thanks for your advice. slic3r has an option to add code for tool changes. While I was able to lower the temp before parking the extruder, I have no idea how to prevent both extruder from oozing. Is there a gcode to manually park the active extruder without "activating" the other?
Here is my toolchange script:

T[current_extruder];

M104 T[previous_extruder] S170 ;lower current extruder temperature

M109 T[current_extruder] S[temperature_[current_extruder]] ;reset printing temperature

Problem is that T[current_extruder] moves the head over the print for heating up, whereas omitting T[current_extruder] has the previous_extruder cool down over the print. Catch 22.

Am I missing something obvious?

Repetier

M104/M109 just operate where you are and that is not what you want. M104 is no problem as it has no delay but M109 waits, so use memory position

- M401 - Store x, y and z position. - M402 - Go to stored position. If X, Y or Z is specified, only these coordinates are used. F changes feedrate for that move.
To move away from print so it does not ooze on it. For example

T[current_extruder];

M104 T[previous_extruder] S170 ;lower current extruder temperature
M401
M104 T[current_extruder] S[temperature[current_extruder]] ;reset printing temperatureG1 X0 Y200 F12000 ; fast move away

M109 T[current_extruder] S[temperature_[current_extruder]] ;reset printing temperature
M402 F12000

So now it heats at 0, 200 and then continues. Eventually you could even remove the M401/M402 if the next move is to wipe tower.

googliola

Genius, forgot about M401 / M402.
T0 and T1 make the head move due to the parking feature. So I guess I'll play around with G28 X and M401 / M402 to move heads to home for heating (as I have 'ooze wipers' installed) then move back to printing position. No wipe tower required ????
Can I store/load multiple positions with M401 / M402? If so, that would be an alternative to G28...
Will post back after my holidays. Away from printer ????????

Repetier

No M401 can only store one position.

You have 2 x axis so it goes beside the wiper? Try lazy positioning so it moves only back when being needed for next move instead then.

googliola

lazy positioning did the trick. My IDEX works like a charm now B)