Boxford v190 cnc

[depronman]

I made another attempt using ‘etcher’ to copy the mint iso to a pen drive
All very straight forward to use etcher and the pen drive worked perfectly even on the
HP pc that previously did not like the pen drive

Etcher 1. Rufus 0. I k ow which I’ll be using in the future

Made good progress today getting a hb04 wireless pendant working and set up
Still got a small problem with the step size selection which is not working quite as it should


Paul


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[John11668]

I didnt find rufus user friendly.
I used win32 disc imager and downloaded mint from clive's linked site
Not being used to linux (never seen it before) it took me a while to find the linuxcncfiles and select lathe from the plethora of configurations , but I have it now with a desktop Icon.

Still puzzled a bit as to how to configure it though .

No problem for now as I need to finish the wiring yet and as I said before I will check this out using Mach 3
Then will come back for specific tuition on Linuxcnc

[Clive S]

Not being used to linux (never seen it before) it took me a while to find the linuxcncfiles and select lathe from the plethora of configurations , but I have it now with a desktop Icon.

I think you may have got a sim working. If you have that lets you play about and use the gui but won't drive a machine.

If you are going to use a P/port the you need to use the stepconf wizard to get started http://linuxcnc.org/docs/2.8/html/config/stepconf.html

[depronman]

I think you may have got a sim working. If you have that lets you play about and use the gui but won't drive a machine.

If you are going to use a P/port the you need to use the stepconf wizard to get started http://linuxcnc.org/docs/2.8/html/config/stepconf.html

I think you will be right there (sim only)
Paul


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[John11668]

so this is what I was looking at



Maybe I just need to send Clive a pen drive .

[clutchslip]

Thanks for the heads-up on Etcher Paul, I used this and the iso booted first time.

My jitter readings are crazy high with my Dell. Going to try with external graphics and see where that get me but may need to change to a different motherboard, we shall see

Ade

[John11668]

Should I be looking at my "Jitter" readings
Until this thread started I did not even know I had any ????

[Doddy]

Crazy high = ??, out of curiosity.

[depronman]

Crazy high = ??, out of curiosity.

You should be looking for < 40,000
On a lathe a CV little higher will not hurt
You are running the same HP pc as I will be using (yes). If so then the max jitter is really quite low
Can likely be improved with an external graphics card as linuxcnc is not recommended with onboard graphics which share system ram
But having said that I’m getting quite low max jitter readings anyway so I think all will be ok

It’s an option from the linuxcnc menus to run test max jitter
Set it running then abuse the pc as best you can and come back to the results after about 10 mins and use the result displayed in your linuxcnc config
What it actually does is inform linuxcnc how much resource is available to process things. When it runs out it would be bad so it limits movement speed to a slower love per second to fit within the available resources
You are not going to hit this on a small lathe as first only two axis are being moved at any time and secondly the steppers are not micro stepping down to really low values. I think I run mine at 4 micro steps which means one Rev of motor (4mm true movement) is a total of 800 pulses
You can imagine as the micro stepping is increased, some run 64 micro steps, that the number of step direction pulses increase very quickly for the same amount of physical movement
Then
Multiply this by three axis movement potentially all at the same time on a mill and you can see that pc resources are a lot more critical on a mill than a lathe

Paul


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[clutchslip]

Hi Doddy.

With everything I can shut down in bios shut down, excepting a pair of rear panel usb ports, with the machine at IDLE, I have 'Max Jitter' figures of Servo 122,194 and Base Thread 52,639....