[Emc-users] G93 Inverse Time Mode

2014-03-07 Thread John Thornton
I'm trying to create a script to add G93 to some XZA G code. I assumed I just needed to calculate the length of the move using right angle triangle calculations then create the F word but I'm getting following errors in sim so I assume I'm not calculating the F word correctly. The radius of A

Re: [Emc-users] G93 Inverse Time Mode

2014-03-07 Thread Mark Wendt
On Fri, Mar 7, 2014 at 7:38 AM, John Thornton bjt...@gmail.com wrote: snippage Does anyone have any ideas about how to calculate the F word? Thanks JT Sorry John, I just had to have a chuckle about that... ;-) Mark

Re: [Emc-users] G93 Inverse Time Mode

2014-03-07 Thread Eric Keller
haven't used inverse time on linuxcnc, but the problem I always had with it was that the calculated time increments were too small for the control On Fri, Mar 7, 2014 at 7:38 AM, John Thornton bjt...@gmail.com wrote: I'm trying to create a script to add G93 to some XZA G code. I assumed I just

Re: [Emc-users] G93 Inverse Time Mode

2014-03-07 Thread sam sokolik
That doesn't seem right - I don't think anything you send linuxcnc in gcode should cause a following error.. (unless the configuration is setup wrong..) On 3/7/2014 7:12 AM, Mark Wendt wrote: On Fri, Mar 7, 2014 at 7:38 AM, John Thornton bjt...@gmail.com wrote: snippage Does anyone have

Re: [Emc-users] G93 Inverse Time Mode

2014-03-07 Thread Bertho Stultiens
On 03/07/2014 02:12 PM, Mark Wendt wrote: snippage Does anyone have any ideas about how to calculate the F word? Sorry John, I just had to have a chuckle about that... ;-) Oh my... Doesn't the /not working/ of the code already calculate the remaining letters? Please don't tell me a mill

Re: [Emc-users] G93 Inverse Time Mode

2014-03-07 Thread Stuart Stevenson
John, Does the regular feed rate not give you the motion you want? On Fri, Mar 7, 2014 at 6:38 AM, John Thornton bjt...@gmail.com wrote: I'm trying to create a script to add G93 to some XZA G code. I assumed I just needed to calculate the length of the move using right angle triangle

Re: [Emc-users] G93 Inverse Time Mode

2014-03-07 Thread Mark Wendt
On Fri, Mar 7, 2014 at 8:27 AM, Bertho Stultiens ber...@vagrearg.orgwrote: On 03/07/2014 02:12 PM, Mark Wendt wrote: snippage Does anyone have any ideas about how to calculate the F word? Sorry John, I just had to have a chuckle about that... ;-) Oh my... Doesn't the /not working/

Re: [Emc-users] G93 Inverse Time Mode

2014-03-07 Thread John Thornton
Stuart, He complains about jerky motion so I was trying to see if G93 would help. JT On 3/7/2014 7:30 AM, Stuart Stevenson wrote: John, Does the regular feed rate not give you the motion you want? On Fri, Mar 7, 2014 at 6:38 AM, John Thornton bjt...@gmail.com wrote: I'm trying to create

Re: [Emc-users] G93 Inverse Time Mode

2014-03-07 Thread Stuart Stevenson
How was the code generated? On Fri, Mar 7, 2014 at 8:01 AM, John Thornton bjt...@gmail.com wrote: Stuart, He complains about jerky motion so I was trying to see if G93 would help. JT On 3/7/2014 7:30 AM, Stuart Stevenson wrote: John, Does the regular feed rate not give you the motion

Re: [Emc-users] G93 Inverse Time Mode

2014-03-07 Thread John Thornton
Visualmill JT On 3/7/2014 8:08 AM, Stuart Stevenson wrote: How was the code generated? On Fri, Mar 7, 2014 at 8:01 AM, John Thornton bjt...@gmail.com wrote: Stuart, He complains about jerky motion so I was trying to see if G93 would help. JT On 3/7/2014 7:30 AM, Stuart Stevenson

Re: [Emc-users] G93 Inverse Time Mode

2014-03-07 Thread Stuart Stevenson
Is the code a bunch of short length motion lines? I have seen jerky motion when the short length lines caused the machine axes to oscillate - the machine was faithfully reproducing the code instructions. I don't know Visualmill but the post processor is critical. On Fri, Mar 7, 2014 at 8:14 AM,

Re: [Emc-users] G93 Inverse Time Mode

2014-03-07 Thread Ricardo Moscoloni
Hi, lcnc dont do blending with the rotation axis, i have the same problem with a filament winder. I realize that some kind of aproximate motion on rotary axes could solve this, (if you can live with), and some hal code could do it, but there my programming skills fall short. Regards Rick

Re: [Emc-users] G93 Inverse Time Mode

2014-03-07 Thread Ricardo Moscoloni
other problem facing is when pure rotary motion lcnc feed at °/time, while doing a combined or linear do feed at lenght/time. Surface speed could have a big change in this situation. Regards Rick 2014-03-07 12:40 GMT-02:00 Ricardo Moscoloni rmoscol...@gmail.com: Hi, lcnc dont do blending with

Re: [Emc-users] G93 Inverse Time Mode

2014-03-07 Thread John Thornton
Yes, it is a bunch of very small moves and the one that causes the error is 0.0027 in total length. So he needs to get the post processor to output longer moves? JT On 3/7/2014 8:20 AM, Stuart Stevenson wrote: Is the code a bunch of short length motion lines? I have seen jerky motion when

Re: [Emc-users] G93 Inverse Time Mode

2014-03-07 Thread Stuart Stevenson
that would be the first thing I would suggest then try shorter and shorter until you error again On Fri, Mar 7, 2014 at 11:15 AM, John Thornton bjt...@gmail.com wrote: Yes, it is a bunch of very small moves and the one that causes the error is 0.0027 in total length. So he needs to get the