More memory help step rate?
21 Feb 2017 23:23 #88471
by JimS
More memory help step rate? was created by JimS
Running Ubuntu 10 on P4 with 512Meg of RAM (later versions don't run well). Seems to work ok and don't have any issues with it. But may want to speed things up a bit as I get some experience with it. Would increasing the RAM help with jitter and step rate? Drive is G540 on parallel port. Step rate isn't too bad but I can get memory pretty cheap so wondered if it was likely to help.
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22 Feb 2017 02:41 #88475
by rodw
Replied by rodw on topic More memory help step rate?
Probably not. See linuxcnc.org/docs/2.7/html/getting-start...em-requirements.html
My understanding it is a function of hardware rather than memory constraints
My understanding it is a function of hardware rather than memory constraints
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- cncnoob1979
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22 Feb 2017 03:35 #88477
by cncnoob1979
Replied by cncnoob1979 on topic More memory help step rate?
For 20$ I would add the memory. Can we say it will absolutely help, no.
It will help you overall with the controller experience.
IMO I would think it will not help with jitter. Unless you are prepared to build another box, or have exhausted other methods, I would give it a try.
I recently built my Linux box for under 300$ and it screams latency is around 7-10 usec reliably. I'm using mesa hardware so low latency was not a issue, just a nice side effect.
Let me know if you want the hardware specs, if interested in building one.
It will help you overall with the controller experience.
IMO I would think it will not help with jitter. Unless you are prepared to build another box, or have exhausted other methods, I would give it a try.
I recently built my Linux box for under 300$ and it screams latency is around 7-10 usec reliably. I'm using mesa hardware so low latency was not a issue, just a nice side effect.
Let me know if you want the hardware specs, if interested in building one.
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- tommylight
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22 Feb 2017 12:42 #88494
by tommylight
Replied by tommylight on topic More memory help step rate?
Add the memory, it is worth every penny.
It will ot help with jitter or step rate, but the usability will be much much better.
G540 has a divider by 10, so not good, although they are very good drives i do not like that divider.
You can get fast enough with that setup for most cases, just play a bit with timings after you get the base thread right.
It will ot help with jitter or step rate, but the usability will be much much better.
G540 has a divider by 10, so not good, although they are very good drives i do not like that divider.
You can get fast enough with that setup for most cases, just play a bit with timings after you get the base thread right.
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