Re: [Emc-users] Slow G code (sam sokolik)

2014-03-21 Thread Mark Wendt
On Thu, Mar 20, 2014 at 1:43 PM, sam sokolik sa...@empirescreen.com wrote: like... http://electronicsam.com/images/KandT/oldkandt.JPG well - it could do the velocity.. but the acceleration is set pretty safe (not too many spare parts.) iirc 10in/sec^2 or something like that. sam Sam,

[Emc-users] Mirrored lathe

2014-03-21 Thread Marius Liebenberg
Hi I have a lathe that does just one job all of the time (one part with varied sizes). The trick with this lathe is that is is two lathes in one. A mirrored setup with a dual tool post in the middle and a spindle on both ends. The tools are fixed always. It will cut one side finished and then

Re: [Emc-users] Mirrored lathe

2014-03-21 Thread andy pugh
On 21 March 2014 15:17, Marius Liebenberg mar...@mastercut.co.za wrote: . The trick with this lathe is that is is two lathes in one. A mirrored setup with a dual tool post in the middle and a spindle on both ends A picture would help a lot. Do you want to use XZ for both spindles, or would

Re: [Emc-users] Mirrored lathe

2014-03-21 Thread Marius Liebenberg
On 2014-03-21 17:29, andy pugh wrote: On 21 March 2014 15:17, Marius Liebenberg mar...@mastercut.co.za wrote: . The trick with this lathe is that is is two lathes in one. A mirrored setup with a dual tool post in the middle and a spindle on both ends A picture would help a lot. Very

Re: [Emc-users] Mirrored lathe

2014-03-21 Thread Stuart Stevenson
Can you rotate like you show and then mirror X? On Fri, Mar 21, 2014 at 10:50 AM, Marius Liebenberg mar...@mastercut.co.zawrote: On 2014-03-21 17:29, andy pugh wrote: On 21 March 2014 15:17, Marius Liebenberg mar...@mastercut.co.za wrote: . The trick with this lathe is that is is two

Re: [Emc-users] Slow G code (sam sokolik)

2014-03-21 Thread sam sokolik
heh - isn't that how we all dress? I had to post some scopes of the torodal gcode. The new tp - strait G64 http://imagebin.org/300857 xyz - velocity gets to the programmed speed (aprox 1.96in/s - 3000mm/min) x acc, y acc. nice sin/cos graphs. sexy! (yes - I think it is sexy...) current tp -

Re: [Emc-users] Mirrored lathe

2014-03-21 Thread andy pugh
On 21 March 2014 15:50, Marius Liebenberg mar...@mastercut.co.za wrote: Very straight forward really. Not a standard lathe but a custom made to cut plastic. Looks much like a wood lathe with two chucks. Linear slides along the Z axis with a chuck at each end. One X axis with permanent tools

Re: [Emc-users] Slow G code (sam sokolik)

2014-03-21 Thread Bertho Stultiens
On 03/21/2014 05:05 PM, sam sokolik wrote: heh - isn't that how we all dress? That depends on how many lumps still hang together on my coat. It has some signs of wear and tear. I had to post some scopes of the torodal gcode. The new tp - strait G64 http://imagebin.org/300857 xyz - velocity

Re: [Emc-users] Mirrored lathe

2014-03-21 Thread Marius Liebenberg
On 2014-03-21 18:02, Stuart Stevenson wrote: Can you rotate like you show and then mirror X? You can with G10 L2 R180. X will rotate 180 deg around the Z. Not what I want. I need to rotate the Z. On Fri, Mar 21, 2014 at 10:50 AM, Marius Liebenberg mar...@mastercut.co.zawrote: On

Re: [Emc-users] Mirrored lathe

2014-03-21 Thread Marius Liebenberg
On 2014-03-21 18:17, andy pugh wrote: On 21 March 2014 15:50, Marius Liebenberg mar...@mastercut.co.za wrote: Very straight forward really. Not a standard lathe but a custom made to cut plastic. Looks much like a wood lathe with two chucks. Linear slides along the Z axis with a chuck at each

Re: [Emc-users] Mirrored lathe

2014-03-21 Thread Dave Caroline
How about just ignore conventions and invert the Z direction. Dave Caroline On 21/03/2014, Marius Liebenberg mar...@mastercut.co.za wrote: On 2014-03-21 18:02, Stuart Stevenson wrote: Can you rotate like you show and then mirror X? You can with G10 L2 R180. X will rotate 180 deg around the

Re: [Emc-users] Mirrored lathe

2014-03-21 Thread Marius Liebenberg
On 2014-03-21 18:57, Dave Caroline wrote: How about just ignore conventions and invert the Z direction. You mean like with a component to invert the dir pin of the stepper? Dave Caroline On 21/03/2014, Marius Liebenberg mar...@mastercut.co.za wrote: On 2014-03-21 18:02, Stuart Stevenson

Re: [Emc-users] Mirrored lathe

2014-03-21 Thread Marius Liebenberg
Maybe I should have mentioned that only one spindle is active at any time. So in essence we have two lathes in one in order for them to step up production. They share a tool post and the x axis. Well the Z as well I suppose. On 2014-03-21 18:17, andy pugh wrote: On 21 March 2014 15:50, Marius

Re: [Emc-users] Mirrored lathe

2014-03-21 Thread Kirk Wallace
On 03/21/2014 09:57 AM, Marius Liebenberg wrote: ... snip The change over from one spindle to the other will happen as a move to the centre of the lathe where the reference position will be. There will be code in the beginning of the job loop to probe the material and then run the gcode from

Re: [Emc-users] Mirrored lathe

2014-03-21 Thread Dave Caroline
I am not sure of your setup one Z or two, if two yes just have your Zs in the way that makes the gcode sensible, so one is inverted, I think your display may need fixing too so it looks properly right hand. Dave Caroline On 21/03/2014, Marius Liebenberg mar...@mastercut.co.za wrote: On

Re: [Emc-users] Mirrored lathe

2014-03-21 Thread Marius Liebenberg
I think you have given my some idea of how to approach this. I will have a panel with some controls on and a python script behind that to make sure only one chuck is working at any time. This way I can turn the setup around and still have the same gcode to work on both sides. One at a time.

Re: [Emc-users] Mirrored lathe

2014-03-21 Thread andy pugh
This might be doable with a programmed tool-change position at the cross over point between the two Z axes. (There is an INI file entry for that) Basically the toolpost moves to zero in the absolute coordinates, then a bit of HAL code inverts the scale of the Z stepgen or PID (possibly according

Re: [Emc-users] Mirrored lathe

2014-03-21 Thread Marius Liebenberg
On 2014-03-21 19:15, Kirk Wallace wrote: On 03/21/2014 09:57 AM, Marius Liebenberg wrote: ... snip The change over from one spindle to the other will happen as a move to the centre of the lathe where the reference position will be. There will be code in the beginning of the job loop to probe

Re: [Emc-users] Mirrored lathe

2014-03-21 Thread Marius Liebenberg
On 2014-03-21 19:35, andy pugh wrote: This might be doable with a programmed tool-change position at the cross over point between the two Z axes. (There is an INI file entry for that) Basically the toolpost moves to zero in the absolute coordinates, then a bit of HAL code inverts the scale

Re: [Emc-users] Mirrored lathe

2014-03-21 Thread Dave Caroline
Why would one have a mirrored lathe if only one is usable at a time? not sure I see the production gain. Dave Caroline -- Learn Graph Databases - Download FREE O'Reilly Book Graph Databases is the definitive new guide to

Re: [Emc-users] Mirrored lathe

2014-03-21 Thread John Kasunich
On Fri, Mar 21, 2014, at 01:41 PM, Dave Caroline wrote: Why would one have a mirrored lathe if only one is usable at a time? not sure I see the production gain. Load one chuck while the other is running. Which of course raises plenty of safety concerns. I hope Marius has a plan for that -

Re: [Emc-users] Slow G code (sam sokolik)

2014-03-21 Thread sam sokolik
I was wondering how I could check that.. I don't know - but I can tell you this.. At G64p.002q0 P is in mm and my config. 30in/s^2 and 500ipm per axis.. the velocity just starts to dip - just wiggles between 3000 and 2999mm/min. If I do p.001q0 it fluxuates around 2200mm/min. The

Re: [Emc-users] Mirrored lathe

2014-03-21 Thread Gene Heskett
On Friday 21 March 2014 13:59:04 Marius Liebenberg did opine: On 2014-03-21 18:17, andy pugh wrote: On 21 March 2014 15:50, Marius Liebenberg mar...@mastercut.co.za wrote: Very straight forward really. Not a standard lathe but a custom made to cut plastic. Looks much like a wood lathe

Re: [Emc-users] Slow G code (sam sokolik)

2014-03-21 Thread Bertho Stultiens
On 03/21/2014 07:06 PM, sam sokolik wrote: I was wondering how I could check that.. I don't know - but I can tell you this.. At G64p.002q0 P is in mm and my config. 30in/s^2 and 500ipm per axis.. the velocity just starts to dip - just wiggles between 3000 and 2999mm/min. If I do p.001q0

Re: [Emc-users] Slow G code (sam sokolik)

2014-03-21 Thread sam sokolik
there is a limitation of 'too short' Rob explained it in a dev email (discusing the Q part of G64).. Unfortunately, the new TP still has the restriction that you have to touch each segment at least once. A small NCD tolerance is still useful to combine stupidly short segments, in

Re: [Emc-users] Slow G code (sam sokolik)

2014-03-21 Thread Bertho Stultiens
On 03/21/2014 07:43 PM, sam sokolik wrote: there is a limitation of 'too short' Rob explained it in a dev email (discusing the Q part of G64).. Unfortunately, the new TP still has the restriction that you have to touch each segment at least once. A small NCD tolerance is still

Re: [Emc-users] Mirrored lathe

2014-03-21 Thread Marius Liebenberg
John That was my first concern as well but as I am not the designer or builder of the machine I have no say about that. The owner did ensure me that there are screens to be installed that will shelter the operator. People do funny things and I just install and configure LCNC :) The shop is run