Re: [Emc-users] Tune up- HAL Oscilloscope.

2008-12-01 Thread amtb
[EMAIL PROTECTED] wrote: Hi I reduced all: Default_valacity =1. Max_velacity =2.0 Default_acceleration = 2.0 Max_acceleration =3.0 I reduced most of them by 2-3 times and graph looks good. I will post it in 20 minutes. I am interesting why my drive can not output more voltage? power

Re: [Emc-users] Tune up- HAL Oscilloscope.

2008-12-01 Thread Anders Wallin
Hi i should be able to go up to +10V to -10V. Am i right? is 1.0 output units means i use only 1.0V out of 10V that system can output? does pic www.conceptmachinery.com/Sh12.jpg looks ok? This looks better, now your Xoutput is not saturating and the error also looks trapezoidal. This is a

Re: [Emc-users] Tune up- HAL Oscilloscope.

2008-12-01 Thread noel
Aram, 2 PID loops are ok to use, just a bit more difficult to tune. I use Yaskawa motors/drives with the m5i20 7i33. I have to tune the yaskawa drive and motor first with yaskawa software and get them running smoothly. Usually I tune them fairly 'soft', that is not very stiff (in velocity mode).

Re: [Emc-users] general control thoughts

2008-12-01 Thread Jim Combs
I think the easiest way to do this is for a point to point network or even a network with a hub is to use raw ethernet packets. An ethernet packet has a payload of up to 1500 bytes. That should be large enough for most things we would want. On top of the payload we have around 20 bytes of

Re: [Emc-users] general control thoughts

2008-12-01 Thread Jim Combs
We've had previous discussions about using ethernet for real time control. In theory, this is NOT difficult stuff. I'll bet I could get something going in a week or three. In practice, though, it is a PITA. That's because you would need a real time driver for each of the zillion or so different

Re: [Emc-users] Tune up- HAL Oscilloscope.

2008-12-01 Thread Jon Elson
[EMAIL PROTECTED] wrote: Hi i should be able to go up to +10V to -10V. Am i right? is 1.0 output units means i use only 1.0V out of 10V that system can output? I still don't know what interface you are using, but that MAY be correct. It would certainly limit your speed if the drive was

[Emc-users] Multi-core processors with EMC

2008-12-01 Thread Leslie Newell
Is it possible to use EMC with multi-core processors? I see that by default the kernel is compiled to only support one processor but what would happen if SMP support was compiled in? Would RTAI choke? As multi-core processors become more prevalent, would it be practical to dedicate one core to

Re: [Emc-users] Multi-core processors with EMC

2008-12-01 Thread Chris Radek
On Mon, Dec 01, 2008 at 05:46:48PM +, Leslie Newell wrote: Is it possible to use EMC with multi-core processors? I see that by default the kernel is compiled to only support one processor but what would happen if SMP support was compiled in? Would RTAI choke? As multi-core processors

Re: [Emc-users] Multi-core processors with EMC

2008-12-01 Thread Alex Joni
On Mon, Dec 01, 2008 at 05:46:48PM +, Leslie Newell wrote: Is it possible to use EMC with multi-core processors? I see that by default the kernel is compiled to only support one processor but what would happen if SMP support was compiled in? Would RTAI choke? As multi-core processors

Re: [Emc-users] Multi-core processors with EMC

2008-12-01 Thread Michael Buesch
On Monday 01 December 2008 18:57:50 Chris Radek wrote: On Mon, Dec 01, 2008 at 05:46:48PM +, Leslie Newell wrote: Is it possible to use EMC with multi-core processors? I see that by default the kernel is compiled to only support one processor but what would happen if SMP support was

Re: [Emc-users] Multi-core processors with EMC

2008-12-01 Thread Alex Joni
On Monday 01 December 2008 18:57:50 Chris Radek wrote: On Mon, Dec 01, 2008 at 05:46:48PM +, Leslie Newell wrote: Is it possible to use EMC with multi-core processors? I see that by default the kernel is compiled to only support one processor but what would happen if SMP support was

Re: [Emc-users] Multi-core processors with EMC

2008-12-01 Thread Alex Joni
when booting the linux kernel you use isolcpus (http://www.linuxtopia.org/online_books/linux_kernel/kernel_configuration/re46.html) Note: isolcpus is supposed to get deprecated in favour of another mechanism. Here's an example using cpusets:

Re: [Emc-users] Multi-core processors with EMC

2008-12-01 Thread Stephen Wille Padnos
Michael Buesch wrote: [snip] Nice. What are the basic config settings you have to do? How to bind rtai to a CPU? RTAPI already does this - it uses the highest numbered active CPU for RT tasks when compiled for SMP. You need to use a kernel command-line parameter, isolcpus. This is a list

Re: [Emc-users] Multi-core processors with EMC

2008-12-01 Thread Leslie Newell
This is very interesting. I only started thinking about it because I set up my house machine using the EMC live cd and noticed only one core was being used. As I don't actually need RTAI on this machine I simply switched to the generic kernel which has SMP. Les Alex Joni wrote: I think the

Re: [Emc-users] Spindle Motor (was Joint 0 Following Error)

2008-12-01 Thread Andrew Ayre
Doug Goff wrote: Andy, The motor tool Gene was (probably) trying to recall is the Proxxon IB/E Professional Rotary Tool. I'm using one on my smallest machine, and it does a great job. Very nicely machined nose allows mounting, the motor is fairly quiet (compared to the Porter-Cable

Re: [Emc-users] Spindle Motor (was Joint 0 Following Error)

2008-12-01 Thread Andrew Ayre
Gene Heskett wrote: On Tuesday 25 November 2008, Doug Goff wrote: Andy, The motor tool Gene was (probably) trying to recall is the Proxxon IB/E Professional Rotary Tool. I'm using one on my smallest machine, and it does a great job. Very nicely machined nose allows mounting, the motor is

Re: [Emc-users] Spindle Motor (was Joint 0 Following Error)

2008-12-01 Thread Gene Heskett
On Monday 01 December 2008, Andrew Ayre wrote: Gene Heskett wrote: On Tuesday 25 November 2008, Doug Goff wrote: Andy, The motor tool Gene was (probably) trying to recall is the Proxxon IB/E Professional Rotary Tool. I'm using one on my smallest machine, and it does a great job. Very nicely