Re: [Emc-developers] motion-profile generation math help

Hi Joel, A bit different focus but still interesting. http://caris.mech.ubc.ca/pubs/theses/sonja.pdf HTH Dave On Jul 28, 2008, at 7:21 PM, Joel C. Salomon wrote: On Mon, Jul 28, 2008 at 11:00 AM, Anders Wallin <[EMAIL PROTECTED]> wrote: I should have a few papers on trajectory planning if yo

Re: [Emc-developers] motion-profile generation math help

On Thursday 24 July 2008, Joel C. Salomon wrote: > If you can explain the code to me (cradek, perhaps), or the algorithm, > or even know a good reference for this, please let me know (on- or > off-list, as seems appropriate). Looks like the emc2 code retains the original PTP planner from EMC altho

Re: [Emc-developers] motion-profile generation math help

On Mon, Jul 28, 2008 at 11:00 AM, Anders Wallin <[EMAIL PROTECTED]>wrote: > I should have a few papers on trajectory planning if you are interested. > There was a book chapter on something called 'segmentqueue', is that > still available online somewhere? Thanks, those papers would be great to h

Re: [Emc-developers] motion-profile generation math help

> I'll still ask if someone knows of some research papers on the > subject, or pointers to the correct function in the EMC code. What kind of trajectories do you want to generate? The ideas/math for 'exact stop' trajectories are not that hard, i.e. you plan a trajectory that starts with zero velo

Re: [Emc-developers] motion-profile generation math help

I would do what I always do. I would take a perfectly working piece of code and use it as a template for my own - that is experimenting. Then, the stages of experiment are: working well, modified and working, modified more and working perfectly, modified even more and not working at all, repaired a

Re: [Emc-developers] motion-profile generation math help

On Mon, Jul 28, 2008 at 3:24 AM, Darren Conway <[EMAIL PROTECTED]> wrote: > I don't think it is reasonable for you to be asking people to volunteer > their time to help you answer questions for the benefit of your > company/employer. Fair enough; I apologize. I'll still ask if someone knows of so

Re: [Emc-developers] motion-profile generation math help

Hello Joel I don't think it is reasonable for you to be asking people to volunteer their time to help you answer questions for the benefit of your company/employer. There are plenty of consultants who would be more than pleased to provide you with what you need to know for a fee. Darren Jo

Re: [Emc-developers] motion-profile generation math help

On Sun, Jul 27, 2008 at 12:35 PM, Jeff Epler <[EMAIL PROTECTED]> wrote: > Can you please say a few more words about the problem? Note that I'm not using EMC; just asking for mathematical help for writing my own code for company-internal use. I know of no problem with the EMC code, except that I

Re: [Emc-developers] motion-profile generation math help

On Sun, Jul 27, 2008 at 10:06:37AM -0400, Joel C. Salomon wrote: > problems with the cut have been observed that seem to indicate this > problem. Not so noticeable in straight-line cuts, but very problematic > in circles; but I need to understand the one before I tamper with the > other. Can you p

Re: [Emc-developers] motion-profile generation math help

On Sun, 2008-07-27 at 10:06 -0400, Joel C. Salomon wrote: Looks like a proper thread to me. (see further note below) > It reverses the normal flow of conversation. > > What's wrong with top-posting? > > Top-posting. > > Wh

Re: [Emc-developers] motion-profile generation math help

On Sun, Jul 27, 2008 at 6:42 AM, Darren Conway wrote: > For my job, I need to understand how adjustments are made to (what I'm >> calling) velocity–ramp-up/-down–time, and constant-velocity–coast–time in >> order to ensure that these are integer multiples of the time step. If you >> can explain th

Re: [Emc-developers] motion-profile generation math help

Hello I'm a lurker on the list and I noticed you haven't had a reply. I am also a control systems engineer and I may be able to help out. Before you tackle this problem, are you sure you have one. If the sample rate is sufficiently higher than the time constants, then corrections/adjustmen

[Emc-developers] motion-profile generation math help

I’m trying to work through the math for trapezoidal motion-profile generation, and I could use some pointers on this subject. Reading through the EMC documentation, at , I saw written, “This is the math for the continuous