Limit switches

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19 Apr 2024 00:57 #298586 by JohnBr00ker
Limit switches was created by JohnBr00ker
I'm having difficulty getting my 85yo brain to remember how to set up my rebuild 3-axis stepper mill.
Firstly, should all the 'stops' that contact my nc limit switches be flexible ? (Rigid at the moment, but looks like a disaster waiting to happen)
Secondly, with one limit switch at each end of the travel, wired in series, which should I select in the Parallel Port set up ?
Got confused by my original notes, which suggested I used 'Minimum limit + Home', about 15 years ago with my first cnc mill !
Perhaps this is correct ?
Regards all,
John

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19 Apr 2024 16:43 - 19 Apr 2024 16:45 #298626 by JohnBr00ker
Replied by JohnBr00ker on topic Limit switches
i may have a greater problem, discovered this morning !
This is the box housing the controller, ex a 'Supercam' setup, which was my starting point years ago.
Attachments:
Last edit: 19 Apr 2024 16:45 by JohnBr00ker. Reason: extra info

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19 Apr 2024 17:58 #298642 by tommylight
Replied by tommylight on topic Limit switches
I have seen much worse, but never such concise structure ! :)
From that picture, from the parts placement and diodes at the outputs, those seem to be L287/L298 stepper drives.

Firstly, should all the 'stops' that contact my nc limit switches be flexible ? (Rigid at the moment, but looks like a disaster waiting to happen)

No, they should not be flexible, that messes precision, the switches should be mounted sideways so in case they are overrun as not to break them, machine should have hard stops, the triggering part should be set so the switch is triggered all the way to the hard stop.

Secondly, with one limit switch at each end of the travel, wired in series, which should I select in the Parallel Port set up ?

Both limits + home.

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19 Apr 2024 18:26 #298650 by JohnBr00ker
Replied by JohnBr00ker on topic Limit switches
Many thanks for your precise reply.
The 'nest' has now been removed, but I need to do a final clean up !
John
The following user(s) said Thank You: tommylight

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19 Apr 2024 18:33 #298653 by tommylight
Replied by tommylight on topic Limit switches
You are welcomed, always.

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19 Apr 2024 20:24 - 19 Apr 2024 20:49 #298666 by JohnBr00ker
Replied by JohnBr00ker on topic Limit switches
Quick additional question - how do I save the half-completed stepconfig file ?
If I close down the window, will it automatically save under the name I've given the mill in the first window ?
John
EDIT
No need - I've just found the 'Apply' menu at the end of the config !
Last edit: 19 Apr 2024 20:49 by JohnBr00ker. Reason: Duh!

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