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extruder as 4th axis

Posted by scancool

scancool

extruder as 4th axis
April 16, 2019 10:20PM

Registered: 5 years ago
Posts: 11

has anyone used one of the secondary extruder as a 4th axis?
if no one has done it, the marlin code is pretty big which files I should be looking into to make this modifications?
I will like to add endstop to one of the extruder to make it a 4th axis

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Genesys

Re: extruder as 4th axis
April 19, 2019 08:18AM

Registered: 5 years ago
Posts: 7

Why would you want a 4th axis? That would over-constrain the system

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Dust

Re: extruder as 4th axis
April 19, 2019 08:49AM

Admin
Registered: 13 years ago
Posts: 6,998

Quote
Genesys
Why would you want a 4th axis? That would over-constrain the system

You seem confused. A 4th axis is not the same as say 4 mounting points on heated bed....

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Genesys

Re: extruder as 4th axis
April 19, 2019 09:53AM

Registered: 5 years ago
Posts: 7

No I’m not confused - if you move in 3 dimensional space with 4 axis, your system is overconstrained and may jam

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Dust

Re: extruder as 4th axis
April 19, 2019 10:57AM

Admin
Registered: 13 years ago
Posts: 6,998

4th axis is normally rotation, eg the bed may rotate around Y, so you can print on the side of things..

On 3d printers It can also be a Dual independent X axis, or real physical bed leveling with multiple Z axis....

not over constrained at all..

Edited 2 time(s). Last edit at 04/19/2019 11:18AM by Dust.

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scancool

Re: extruder as 4th axis
April 21, 2019 06:09PM

Registered: 5 years ago
Posts: 11

I'm working on a robotic arm, I want to use this firmware to control it.
Genesys regarding 4th axis 3d printer this is what Dust is referring to
[youtu.be]

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n9jcv

Re: extruder as 4th axis
May 03, 2019 12:52PM

Registered: 10 years ago
Posts: 211

There is a huge thread about this,

some have various versions of 1.1.x working

One guy DerAnder has a 2.0 version working
and it sounds like 2.0 will support thru Hangprinter like architecture multiple axis

Github 4th axis Marlin

Using the info in that thread I was able to get it working (kind of dirty like) in 1.1.8 where my E0 is a 4th axis and I can home it.