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| The Sequel - Oh Blimey I bought a CNC Lathe (Beaver TC 20) |
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| awemawson:
And in some cases the digital outputs will be quite dynamic. For instance the 8 bits shown as '1's ' on the above picture are the data bus that the PLC uses to talk to the SMCC card that is a slave PLC that controls the tool turret - wheels within wheels comes to mind! |
| Joules:
A cheapish logic analyser and big bunch of resistor arrays ? |
| vtsteam:
Good to see you working on this Andrew! :beer: |
| awemawson:
Thanks Steve - yes I'm a bit more able to get my head arround things now thank goodness. This morning I went through all the digital outputs and proved that they were in the same state that the 'Q' words in the control were at - they were ! I suspect that the digital input output system is actually fine though it's not conclusive on the outputs as I can only observe rather than drive them. However I HAVE found that the drive circuit for the main spindle drive is reporting an error - it also has a tell tale red LED that should be 'on' but it isn't. Fortunately I do have a spare so I'll install it when time permits - ATM waiting to meet and greet two sets of cottage guests whose arrival is imminent. (sounds of thumbs twiddling!) |
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