Gallery, Projects and General > Project Logs
Oh Blimey I bought a CNC Lathe !!!!
awemawson:
--- Quote from: Swarfing on March 12, 2013, 07:12:38 PM ---If you have PLC controls in there i'm sure something using something like MODBUS would get working with linuxcnc?
--- End quote ---
The PLC is a logical function of the controller rather than a separate item. The PLC has it's own ROM representing the logical ladder network, but the same processor that runs the G code runs the PLC. The processor runs on an interrupt timer chain, highest priority being given to reading fleeting sensors, next priority to axis and spindle events, and lowest priority to the man / machine interface.
If I don't manage to resurrect the original controller I may well have to install several PLCs, possibly linked using the TCP/IP variant of MODBUS to get the number of points read and processed in the timescale.
Tony_J:
--- Quote from: Pete. on March 02, 2013, 07:37:04 AM ---Haven't spotted any mushroom clouds on the horizon yet. Did the brown smoke come out?
--- End quote ---
No brown smoke, but Andrew has taken to wearing his brown cords. Nuff said.
awemawson:
Well a bit more progress today while I am waiting for spares to arrive. In the control cabinets there was a mess of wiring all pulled out of the trunking, and a single pole toggle switch dangling on the base uninsulated, unlabelled, and certainly unloved by me! Spent some time tracing it's wires. One end went to an axis overload sensor, the other to a terminal with nothing on it. So it was doing precisely nothing and is now removed. Also fixed the alert light that sits on top of the cabinet and lets you know when (presumably) a cycle is finished. Obviously been sheared off in some previous move. Quick turning job to make a new mounting, replace the very odd shaped squat 24 v 5 watt two pin bulb (amazingly I had a spare!). Also managed to get all the loose wiring and cable runs back into the right trunking - it least it now looks good even if it doesn't work :lol:
DMIOM:
--- Quote from: awemawson on March 14, 2013, 08:52:49 AM ---....- it least it now looks good even if it doesn't work :lol:
--- End quote ---
a bit like the chap who sits on the train and seems to fill in the crossword with alarming speed - but when he gets off, someone looks at the discarded paper and sees that all the squares have been filled with rhubarb or supacalafragalisticexpialadocious !
vtsteam:
The first steps lead eventually to the last steps to completion for any project. It feels good to bring order out of what is supposed to be defunct. And determining and organizing wiring is essential on something of this complexity. I think you wanted a big challenge, and I think you're up to it.
This is exactly what being a mad modder is all about. :beer:
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