Thread: Home Switch Problem
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27-03-2017 #41
Hi John the meter readings are all zero on that side switches open or closed
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27-03-2017 #42
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27-03-2017 #43
John can I send you the board ?
You know way much more than I do about this kind of stuff
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27-03-2017 #44
Hi Kev
OK
PM sent
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27-03-2017 #45
John, I suspect you've got the optos in the wrong order.
If you look at the traces on the top side, I'd say the top opto is P10, and it's track runs down the outside of the limit switch connector to the E-Stop connector. The tracks of the other 4 optos seem to match up nicely with the Limit Switch connector, and I wouldn't expect the bottom opto track to run the way it does if it was going to the E-stop connector.Avoiding the rubbish customer service from AluminiumWarehouse since July '13.
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06-04-2017 #46
Hi m_c
from post 45 "John, I suspect you've got the optos in the wrong order"
you are correct
now I have looked more closely
during the last few days I have installed mach3 on 3 PC's
IBM thinkcentre , Dell optiplex 755 and a PC built using a ASUS H110M-R motherboard
so I should be in a better position to test Kevins mach 3 settings
John
PS
as I can't upload a PDF data sheet on DC to DC converters
a link can be found here-
http://uk.rs-online.com/web/p/isolat...rters/1914922/Last edited by john swift; 06-04-2017 at 12:56 PM. Reason: add PS link to RS Components for DC DC converters
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06-07-2017 #47
Hi...as per my knowledge when the limit switch is closed, the EL817 opto isolator's NPN transistor will ground the printer ports input pin. The breakout board does not have any pull up resistors to ensure a printer port input is at a valid logic high when the limit switch is open.
assembly circuitLast edited by RickyTerzis; 03-08-2017 at 11:27 PM.
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