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07 Mar 2022 21:43 #236604 by remon_v
After I got the new BOB I tried all modes. Good to know SPP is best... not sure what you mean with X-mode?

It is possible that the parallel port was damaged when you ruined the other BOB.

Oke I thought the BOB protects the PC via the octocouplers....

Tomorrow my PC arrives, hope it was a PC problem and I can finally get my machine to work

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07 Mar 2022 21:59 #236605 by tommylight

Oke I thought the BOB protects the PC via the octocouplers....

Most cheap BOB's do not have optocouplers at all, just some buffering or transceivers.
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08 Mar 2022 13:43 #236672 by Todd Zuercher
Linuxcnc's parallel port driver has 3 possible modes of operation out, in and X. Out has 12 outputs and 5 inputs. In has 4 outputs and 13 inputs. And X has 8 outputs and 9 inputs. X-mode may not work with all parallel ports, and it must be configured for SPP,. I've set up a few machines that used it. The biggest downside to X-mode, is that there are no breakout boards on the market that support it. So you either have to roll your own or run without.
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08 Mar 2022 20:01 - 08 Mar 2022 20:16 #236705 by remon_v
YESSSSSS! It works!

I just recieved my 'new/old' PC, attatched everything like normal.... and it works... finally!
This PC (Core2duo E8500) is older than my other one (JQ1900B-ITX) but it seems to be faster... and I just plugged in my SSD and that works too right out of the box (thanks to Linux)

Everyone thanks for the help!
Last edit: 08 Mar 2022 20:16 by remon_v.
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08 Mar 2022 22:14 #236718 by Clive S
Glad you got it going.  Now you have to make chips
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10 Apr 2022 09:30 #239806 by remon_v
I finally got my machine working, but now I need to tweak settings like max velocity and acceleration. How can I best tweak them?

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10 Apr 2022 21:35 #239861 by andypugh
Increase them until you get scared, then back off a bit :-)
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11 Apr 2022 12:51 - 11 Apr 2022 12:52 #239918 by Todd Zuercher
Best to hand edit where they are set in the ini file.

But for testing and tweaking there is a way to temporarily change their values without restarting Linuxcnc after every change using the "ini.x" halpins and the setp command. Use halshow to look up the exact pin name, then you can type the setp command, pin name and value in the halcommand line at the bottom.
Last edit: 11 Apr 2022 12:52 by Todd Zuercher.
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