Help choosing LinuxCNC PC

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03 Nov 2019 16:55 #149498 by renatofmpinheiro
Hi,

I need some help to choose the best PC to use with the linuxCNC and this kit: www.ebay.de/itm/-Best-Offer-Free-4Axis-N...-Wantai/183265631829
I see some posts mencioning the j1800, j1900 and j4005 but don't find any latency test results for that boards.
In your opinion what PC I should buy. Don't need to be an mini itx board, can be any size or an ready desktop.

Best regards,
Renato Pinheiro

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03 Nov 2019 17:22 #149499 by pl7i92
Replied by pl7i92 on topic Help choosing LinuxCNC PC
hi
we use alot of this PC
its very cheep and runs like hell on that set of drivers
www.ebay.de/itm/FUJITSU-SIEMENS-ESPRIMO-...-DVD-RW/254284503451

if you decide to go for separate components you will be some what cheeper
4Drivers a 8Euros
1 5Axis board at 10 euro
and the powersup 36V at 12A 22Euros

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03 Nov 2019 18:52 #149504 by renatofmpinheiro
Thanks pl7i92,

You have any information of the latency test for that PC?

Where you get the drivers at that price?

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04 Nov 2019 10:57 #149536 by renatofmpinheiro
What do you think about this one: www.ebay.co.uk/itm/Cheap-Dell-Optiplex-3...Options/362797914851

Best regards,
Renato Pinheiro

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05 Nov 2019 18:36 #149630 by renatofmpinheiro
The PC need to be that or any PC with that CPU works fine?

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08 Nov 2019 21:59 #149943 by renatofmpinheiro
I'm thinking building one with the ASRock J4005B-ITX, any advice?

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09 Nov 2019 01:06 #149953 by andypugh
Replied by andypugh on topic Help choosing LinuxCNC PC
Unfortunately it is hard to say unless someone else has the exact same PC.
But most things work OK, it is just that some are better.

Don't get too hung-up on the latency numbers.

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09 Nov 2019 01:40 #149955 by tommylight

renatofmpinheiro wrote: What do you think about this one: www.ebay.co.uk/itm/Cheap-Dell-Optiplex-3...Options/362797914851

Best regards,
Renato Pinheiro

Had 5 of those, they do work nicely with RTAI and they do work quite good with Preempt-RT with something like 70000 to 80000 latency, with Debian Stretch.

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10 Nov 2019 10:49 #150047 by billykid
Replied by billykid on topic Help choosing LinuxCNC PC
I was lucky enough to find an "iei kino DH610 R10" with cpu i5 and 2 gb ram at € 100 and I must say that it goes perfectly. I have 2 ssd with wheezy and stretch goes well with both in closed loop at 8 khz.
latency wheezy rtai = less than 20000 never latency errors
latency stretch rt-preempt = about 30000 some case of error always at 8 khz however never fails.
It is an industrial card that costs a lot but is excellent.
regards
Mauro

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