What does speed factor do ?

peter247

o.k , This may look like a silly question .

I do know what it does , but want to know does it speed up all axis or just X , Y and leave Z and the extruder retracts etc alone ?.

theruttmeister

It effectively scales anything with a feedrate (F value).
Including Z and E moves, it has to do that to keep all the moves in sync.

I believe that G10/11 commands are not effected, so if you use M220 a lot and have issues, you can go that way.
I've not tested that though...

peter247

@theruttmeister

Changing the retraction and Z speed not good !!!!! , just checking .
I don't think you can making cura now use g10/g11 instead of using g1 for retractions.

Phaedrux

@peter247 said in What does speed factor do ?:

I don't think you can making cura now use g10/g11 instead of using g1 for retractions.

Yes you can, you just need to install the Printer Settings plugin and that will expose the firmware retraction setting. It's a shame it's not supported by default.

Also see here: https://forum.duet3d.com/topic/14418/what-types-of-move-should-the-speed-factor-affect?_=1598987294733

theruttmeister

@peter247 said in What does speed factor do ?:

@theruttmeister

Changing the retraction and Z speed not good !!!!! , just checking .

Its the correct way to do it though... all 4 axies need to stay in sync.

And if if increasing your Z speed is going to cause an issue, you might want to limit that in firmware... making sure your printer can't break itself is a good plan. M220 can't make your printer exceed its firmware limits.

peter247

@theruttmeister

I mean the other way around !!!!

I don't want to change Z or E Retractions, because when I increase my by 50% my X and Y speed from say 50m/s to 75m/s , I think that I'm going to have problems with increasing my retractions from 50m/s to 75m/s.
I guess I could just put a firmware limit to stop it going over 50m/s

Phaedrux

Using firmware retraction should solve the retraction problem. And setting a max speed for all your axis that is reasonable should handle the other axis. Set X Y to be whatever you want the max travel speed to be, and set Z for the max of whatever the Z axis can handle.

deckingman

@peter247 Things changed on 3.1. According to the release notes, speed factor override does not affect extruder only moves (nor any move commands that are in macros). So retractions shouldn't be affected.