Re: [Emc-users] How can I stop the prescan & make it run until the error

On Tuesday 17 November 2015 10:44:02 John Thornton wrote: > You can use the ruler from a square... A foot out, my square is in 1/16ths. For this, that never gets to rotate speed so it won't fly. ;-) I go by the errors I see. If the right hand finger is to narrow, my board width is too big &

Re: [Emc-users] How can I stop the prescan & make it run until the error

On Tuesday 17 November 2015 10:46:22 John Kasunich wrote: > You're working wood. You don't need a gage block. Just something > with a consistent length. Could even be wood, as long as the grain is > lengthwise. > > Carefully cross-cut two pieces of wood square and smooth, a bit under > 6"

Re: [Emc-users] How can I stop the prescan & make it run until the error

On Tue, Nov 17, 2015, at 11:10 AM, Gene Heskett wrote: > On Tuesday 17 November 2015 10:44:02 John Thornton wrote: > > > You can use the ruler from a square... > > A foot out, my square is in 1/16ths. For this, that never gets to rotate > speed so it won't fly. ;-) I go by the errors I see.

Re: [Emc-users] How can I stop the prescan & make it run until the error

On Tuesday 17 November 2015 04:53:37 andy pugh wrote: > On 17 November 2015 at 06:48, Gene Heskett wrote: > > Now, is there some way I can add a slider that would diddle the z > > height by 2 thou a click while its running? > > Yes, you would need to make a PyVCP control or

Re: [Emc-users] How can I stop the prescan & make it run until the error

You can use the ruler from a square... JT On 11/17/2015 9:20 AM, Gene Heskett wrote: > On Tuesday 17 November 2015 08:32:12 John Thornton wrote: > >> Use a gauge block like 12" high and the depth pin on your calipers to >> measure the difference between the gauge block and the wood piece. > Nice

Re: [Emc-users] How can I stop the prescan & make it run until the error

You're working wood. You don't need a gage block. Just something with a consistent length. Could even be wood, as long as the grain is lengthwise. Carefully cross-cut two pieces of wood square and smooth, a bit under 6" long. Measure each one with your 6" calipers. Then glue them end-to-end

Re: [Emc-users] How can I stop the prescan & make it run until the error

On Tuesday 17 November 2015 08:32:12 John Thornton wrote: > Use a gauge block like 12" high and the depth pin on your calipers to > measure the difference between the gauge block and the wood piece. Nice idea, John, but I don't have any blocks. I need to fix that I guess. > On 11/17/2015 6:59

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

I have plasma machine with a X axis of 3000mm but I need to cut pipes of 6000mm long. I have another 3000mm axis that can be fitted to the end of the table to make a 6000mm travel. The only this is that the axis is split in two. In other words I will have to have a motor to travel the table

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] Emc-users Digest, Vol 115, Issue 52

>> Thornton wrote: >> LOL I forgot who sent me the scrip to get RTAI on Linux Mint but it >> worked. I just installed LinuxCNC instead of using a RIP. I even got >> email working on Mint in 1 minute and have never gotten to to work on >> Wheezy. >> >> Thanks >> JT Glad script file helped you out

Re: [Emc-users] How can I stop the prescan & make it run until the error

On 17 November 2015 at 16:35, John Kasunich wrote: > Actually, an even easier way http://www.ebay.com/itm/161133003610 -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto

Re: [Emc-users] How can I stop the prescan & make it run until the error

Use a gauge block like 12" high and the depth pin on your calipers to measure the difference between the gauge block and the wood piece. On 11/17/2015 6:59 AM, Gene Heskett wrote: > I need a digital caliper that can measure a foot.

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

That will work if you always have tubes that are longer than 3000mm. If you need to cut shorter that half the distance then only one motor will move and then the scale will be broken. This is way I thought that some hand-off might be the answer. Or am I not seeing the whole picture with the two

Re: [Emc-users] How can I stop the prescan & make it run until the error

If you are willing to wait till December On Tue, Nov 17, 2015, at 11:47 AM, andy pugh wrote: > On 17 November 2015 at 16:35, John Kasunich wrote: > > Actually, an even easier way > > http://www.ebay.com/itm/161133003610 > > > > -- > atp > If you can't fix it,

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?

My mental picture of your machine might not be accurate. I'm visualizing a cutting head that moves along an axis using one motor, and another motor that moves the entire axis. If that is wrong then the rest is wrong too. Anyway, assume that home = 0, and when homed the cutter head is at the far

Re: [Emc-users] How can I stop the prescan & make it run until the error

On Tuesday 17 November 2015 11:47:55 andy pugh wrote: > On 17 November 2015 at 16:35, John Kasunich wrote: > > Actually, an even easier way > > http://www.ebay.com/itm/161133003610 Nice looking unit, but I recognize the head. I have several (half a dozen?) of them in

Re: [Emc-users] How can I stop the prescan & make it run until the error

On 17 November 2015 at 23:36, Gene Heskett wrote: > Nice looking unit, but I recognize the head. I have several (half a > dozen?) of them in the 6 inch size and the intermittent display, on a > segment by segment basis doesn't make it worth even that paltry sum. > I've taken

Re: [Emc-users] How can I stop the prescan & make it run until the error

On Tuesday 17 November 2015 12:42:14 John Kasunich wrote: > If you are willing to wait till December > > On Tue, Nov 17, 2015, at 11:47 AM, andy pugh wrote: > > On 17 November 2015 at 16:35, John Kasunich wrote: > > > Actually, an even easier way > > > >

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" To: "Enhanced Machine Controller (EMC)" Sent: 2015-11-17 22:06:15 Subject: Re: [Emc-users] Split X axis - How to go about that? On 17 November 2015 at 20:00, Viesturs Lācis

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. > > >

[Emc-users] Npt-expensive digital calipers. Re: How can I stop the prescan & make it run until the error

On 11/17/2015 4:57 PM, andy pugh wrote: > If it is the same as the similar one that I have the case is stainless steel. > And mine has been working as-intended for years. Harbor Freight's latest stainless steel digital 6" caliper has metric, decimal inch and fractional inch. Fractional displays

Re: [Emc-users] How can I stop the prescan & make it run until the error

On Tue, Nov 17, 2015, at 11:57 PM, John Kasunich wrote: > > > On Tue, Nov 17, 2015, at 06:57 PM, andy pugh wrote: > > On 17 November 2015 at 23:36, Gene Heskett wrote: > > > Nice looking unit, but I recognize the head. I have several (half a > > > dozen?) of them in the 6

Re: [Emc-users] How can I stop the prescan & make it run until the error

On Tue, Nov 17, 2015, at 06:57 PM, andy pugh wrote: > On 17 November 2015 at 23:36, Gene Heskett wrote: > > Nice looking unit, but I recognize the head. I have several (half a > > dozen?) of them in the 6 inch size and the intermittent display, on a > > segment by segment

Re: [Emc-users] How can I stop the prescan & make it run until the error

On 17 November 2015 at 06:48, Gene Heskett wrote: > Now, is there some way I can add a slider that would diddle the z height > by 2 thou a click while its running? Yes, you would need to make a PyVCP control or GladeVCP control (or, for that matter, wire up a physical

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