Real time error on fast PC & install PCI Parport?

Sorry Im not next to computer right now. Actually you are right, I remember it is df08 in my case.

Before emc just wont start and keeps crashing. So I went into the settings file and deleted out the extra "0xdf08 out" to just "0xdf08" then it was able to start. I guess this was the reason I couldnt figure out port by trial and error because the extra info messed it up and would never start even when I type it right in stepconfig.

Ok since my comp is not suited and a new one is not too costly maybe I will go there instead of getting a used one which will cost me as much. And the D525 suggested has PCI port too so my card is not wasted.

Regarding the D525, its a dual core, so for this one I definately need to do the isolcpus=1 thing?

Also, should I be getting the Gigabyte motherboard version or the intel (the intel has only heat sink and no fan so maybe advantage from noise perspective but maybe the Gigabyte faster)?\

I guess my final question abou the D525 is, can this guy handle being remote desktop into without lagging? My old setup I do a headless linux so I can use my main computer to remote desktop in, but there are very minor display lag issues but doesnt affect function.

Coincidentally I have spare DDR3 sodimms that I can use from home so that definately saves on cost and a spare HDD I can pull out and use for this.

Im wondering though, my ram is DDR3 PC-8500. I assume the RAM is backward compatible so the motherboard can take my ram instead of getting the lower end ram it requires (the DDR3 PC-800)?

Im wondering if there are options available for uploading all motion commands to be controlled by a dedicated controller instead of EMC2 so that you avoid any potential for missed steps and have great speed. I guess EMC2 itself is a motion controller, but its a PC based on and PCs sometimes have intermittent lag and stuff so when operating open loop with steppers, its not impossible for some random lag spike to throw your job off a bit? With a dedicated controller with stored memory from buffered signals sent from EMC2, it may avoid those problems?

But I guess thats why you are advocating a dedicated computer for EMC2 so to avoid random lag, but even still, wont the computer do some random system update or some checks randomly and that may throw the timing off by a bit and maybe even cause a few missed microsteps?

BigJohnT wrote:

questi wrote:

Regarding the D525, its a dual core, so for this one I definately need to do the isolcpus=1 thing?

Also, should I be getting the Gigabyte motherboard version or the intel (the intel has only heat sink and no fan so maybe advantage from noise perspective but maybe the Gigabyte faster)?

You don't have to but on my Intel D525BOX I set isolcpus=1 and disabled hyperthreading in the bios both of which improved the latency a bit.

John

I just got that motherboard and received it today. I was wondering if you were getting real time latency warning when EMC2 starts just by disabling hyperthreading and setting isolcpus=1?

I did that on a vanilla setup but everytime I start EMC2 I will get an error, but the actual jitter is pretty good, around 5000 on moderate load, around 1000 something when you have no load (is that possible? most people report pretty high numbers).

The only thing hardware wise that may not be idea is the RAM, since I pulled that out of a laptop and it is PC3-8500 ram, but it should be backward compatible though?

Hi

everytime I start EMC2 I will get an error,

You can't just start EMC, you have to select a config first.
Are you running the same stepconf derived config that gave you errors on your old machine? If so please post the .ini file.
You can get realtime errors because the base thread is set to silly figures.

Do you get realtime errors running one of the sims?

regards