Any feasibility of experience with QtPlasmaC on a Chromebook
07 Dec 2021 15:04 #228536
by kramerda
Tring to decide best option to get my working PlasmaC machine ( Rpi4 w/wMesa 7196) 'upgraded' to QtPlasmaC on a low cost platform.
Does anyone have any experience / thoughts on feasibility of this approach. They are attractive at the sub $200
price point. I am only literate enough to work from an 'image' not any custom builds :>)
Thank you
Dennis
Does anyone have any experience / thoughts on feasibility of this approach. They are attractive at the sub $200
price point. I am only literate enough to work from an 'image' not any custom builds :>)
Thank you
Dennis
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07 Dec 2021 16:20 #228538
by tommylight
Replied by tommylight on topic Any feasibility of experience with QtPlasmaC on a Chromebook
Pretty sure RodW uses a chromebook for LinuxCNC simulation.
As a general rule, laptops are not usable for running machines due to power saving implementations messing the timings and latency.
As a general rule, laptops are not usable for running machines due to power saving implementations messing the timings and latency.
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07 Dec 2021 17:58 #228557
by kramerda
Replied by kramerda on topic Any feasibility of experience with QtPlasmaC on a Chromebook
Thank you Tommy - I was under the 'impression' that the Mesa ethernet card was buffered up with instructions - then latency/stepper timing was much less dependent on the computing power used. Not sure where that came from - but thats not the case?
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07 Dec 2021 19:28 #228564
by tommylight
Replied by tommylight on topic Any feasibility of experience with QtPlasmaC on a Chromebook
USB controllers use buffers, still i would never use USB anything for machine control.
Ethernet needs 1ms timings betwen read/writes, that can be lowered or raised, but does not tolerate waiting for packets for half or full second of time.
Ethernet needs 1ms timings betwen read/writes, that can be lowered or raised, but does not tolerate waiting for packets for half or full second of time.
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07 Dec 2021 19:38 #228568
by rodw
Replied by rodw on topic Any feasibility of experience with QtPlasmaC on a Chromebook
Yes, I run Linuxcnc compiled from source as a Sim on my chromebook in the normal Linux terminal.
But its totally unsuited for driving a machine. Super high latency and no ethernet port.
If the raspberry Pi is not working out for you the lowest cost option would be a used corporate PC like the Dell 780
But its totally unsuited for driving a machine. Super high latency and no ethernet port.
If the raspberry Pi is not working out for you the lowest cost option would be a used corporate PC like the Dell 780
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