Re: [Emc-users] Split X axis - How to go about that?

On 17 November 2015 at 17:18, Marius Liebenberg wrote: > has anyone attempted this kind of silly > arrangement? https://forum.linuxcnc.org/forum/46-francais/28479-cinematique-avec-axes-redondants-presentation?limitstart=0#52533 -- atp If you can't fix it, you don't

Re: [Emc-users] Split X axis - How to go about that?

4:56 Subject: Re: [Emc-users] Split X axis - How to go about that? >Instead of a hand-off you could run both axes all the time. If you >command a 100mm move, >the main axis would move 50mm and the auxiliary axis would also move >50mm. > >To do that with steppers you coul

Re: [Emc-users] Split X axis - How to go about that?

Instead of a hand-off you could run both axes all the time. If you command a 100mm move, the main axis would move 50mm and the auxiliary axis would also move 50mm. To do that with steppers you could simply send the same step pulses to both motors (if they have the same steps-per-mm). Then

Re: [Emc-users] Split X axis - How to go about that?

That will work for servos but in my case I am using steppers. Not sure if the problem is the same. I want the axis to be spit in two and the controller must know when to use what stepper to get all the way from 0 to 6000mm. Somewhere in the middle there must be some sort of handover between

Re: [Emc-users] Split X axis - How to go about that?

d this mean that the zero position will have both motors sitting in > the middle? > > -- Original Message -- > From: "John Kasunich" <jmkasun...@fastmail.fm> > To: emc-users@lists.sourceforge.net > Sent: 2015-11-17 20:04:56 > Subject: Re: [Emc-users] Split X

Re: [Emc-users] Split X axis - How to go about that?

2015-11-17 21:54 GMT+02:00 John Kasunich : > Just divide the steps per mm for X in half, and send the X steps to both > gantry and pipe chuck motors using HAL. Also send X direction to both > motors, and invert one so they travel in opposite directions. Use HAL > logic

Re: [Emc-users] Split X axis - How to go about that?

-- Original Message -- From: "andy pugh" <bodge...@gmail.com> To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net> Sent: 2015-11-17 22:06:15 Subject: Re: [Emc-users] Split X axis - How to go about that? On 17 November 2015 at 20

Re: [Emc-users] Split X axis - How to go about that?

2015-11-17 22:23 GMT+02:00 Marius Liebenberg : >>Why not to treat the chuck motor as another joint of X axis? There >>already are 2 of them (on the gantry), so adding 3rd should be >>straightforward - that allows homing the chuck to its own switch >>without any additional

Re: [Emc-users] Split X axis - How to go about that?

>A picture truly is worth 1000 words > >So, to cut a zero length pipe, you put the pipe chuck all the way to >the left and the torch carriage all the way to the right. > >To cut a 500mm pipe, you move the pipe chuck 250 mm to the right and >the torch carriage 250mm to the left from the

Re: [Emc-users] Split X axis - How to go about that?

On Tue, Nov 17, 2015, at 02:40 PM, Marius Liebenberg wrote: > >One question: why not make the pipe chuck be a U axis, the torch > >carriage is X, and let the g-code programmer have complete control of > >what happens? Move pipe only, torch only, or both, under g-code > >control. > > >

Re: [Emc-users] Split X axis - How to go about that?

On Tue, Nov 17, 2015, at 02:10 PM, Marius Liebenberg wrote: > > Ok the picture is attached. It is a bit different from what you saw :) > A picture truly is worth 1000 words So, to cut a zero length pipe, you put the pipe chuck all the way to the left and the torch carriage all the way

Re: [Emc-users] Split X axis - How to go about that?

On 17 November 2015 at 20:00, Viesturs Lācis wrote: > Why not to treat the chuck motor as another joint of X axis? There > already are 2 of them (on the gantry), so adding 3rd should be > straightforward That ought to work, for the first ever XYZAXX config :-) -- atp

Re: [Emc-users] Split X axis - How to go about that?

> >> >One question: why not make the pipe chuck be a U axis, the torch >> >carriage is X, and let the g-code programmer have complete control >>of >> >what happens? Move pipe only, torch only, or both, under g-code >> >control. >> >> >> Not sure I understand how to use the U axis. I will

Re: [Emc-users] Split X axis - How to go about that?

>2015-11-17 21:54 GMT+02:00 John Kasunich : >> Just divide the steps per mm for X in half, and send the X steps to >>both >> gantry and pipe chuck motors using HAL. Also send X direction to >>both >> motors, and invert one so they travel in opposite directions. Use

Re: [Emc-users] Split X axis - How to go about that?

>2015-11-17 22:23 GMT+02:00 Marius Liebenberg : >>>Why not to treat the chuck motor as another joint of X axis? There >>>already are 2 of them (on the gantry), so adding 3rd should be >>>straightforward - that allows homing the chuck to its own switch >>>without any