Enn:nn:nn:nn

santy

Can someone explain how the firmware manages the speed of each extruder to ensure that the feed rate through the nozzle matches the specified values? For two extruders, would it be 50% for each?

Let's consider the scenario where I have M563 P4 D0:1:2:3:4 H1:2:3:4, without any mix ratio specified in M567, and the same steps per mm. I'm using Reprap v3.5.0.

If I send G1 E150:50:25:75, then D3 should finish first as it's 25mm, but it takes as long as 150mm. Is this correct? I'm trying to control the value for each extruder, but it doesn't seem to work.

Or even i set mix ration to 1.00:1.00:1.00:1.00, still if i send, it still takes D3 to reach as slow as D1 of 150mm, isn't that D3 should be spinning faster?

thanks

oliof

@santy coordinated moves between different axes will be adjusted so they all finish at the same time. I assume yhe same happens for parallel multi extrusion. If for some reason you'd want one if your extruders to run independently, youd need to command that via the second independent gcode stream, which I have no personal experience with

droftarts

@santy G1 is a coordinated move, ie all commanded movements finish at the same time. If you wanted them to all go at the same speed, and finish after the length in your G1 command, you would have to send:

G1 E25:25:25:25
G1 E25:25:0:25
G1 E25:0:0:25
G1 E75:0:0:0

Ian

santy

@droftarts Right, so i have to do this only. Ok thanks, any other possibilities?

droftarts

@santy none that I can think of for four extruders.

Ian