Often cnc machines run very uneconomically for that reason.
With a manual machine one, feels see's and hears the strain, or lack thereof.
One huge problem with cnc is that operators seem to not have a feeling for how much strain the machine or cutter is under. Our in house tool-making facility was very modern.nothing worked and I outsourced tools for my department. Later when these lads retired tools were delivered mostly faulty in no less than 6 months. Toolmakers who made tools for us without cnc technology supplied very good quality tools within 6 weeks. I used to be in the injection moulding trade. Since then all I can recall is fixing problems that were made with cnc technology. I am certainly not a great friend of the cnc technology, I managed to finish my apprenticeship before cnc was "in". One of the biggest problems in conventional machining is when it comes to making the first reference surface and then not being able to work from their due to bad re-clamping. For example changing position of the part without needing to re-clamp etc. BOC had one so bad that the setters refused to push the green button and they were right too as 9 times out of 10 it resulted in a crunch up.īrit what I meant to say is that if done right the CNC machines have their good points, or can have. Many employers have swallowed the CNC hype and believe that any muppet can mind them never mins set them up. Employ monkies and get rubbish, buy cheap,poor tooling and get problems. The other one is scrimping on tooling, pay and training. it was not the machines fault but the muppets setting and running them. Many hundreds of parts scrap yet they were made on the wonderful CNC's.
I moved the part of BOC and sure enough 4 month ater Pasqua shut the place down. Pasqua the new manager said never mind mistakes happen yet when due to tool wear soem circlip groove were 0.002" tight he went berserk and those were easily rectified. Sure the corners could be ground tot eh correct diameter but the valves would not work due to leakage past the flats. The muppets had made them out of hex bar. His pet factory sent over a large batch of relief valves for grinding made on their new CNC machines.
I recall when working at one firm the new boss overall came from another factory in the group and he didn't like having to travel to ours and the site was a good one for development so I started looking for a new job as I knew he would close it down and I didn't fancy the ride over in the winter to the factory he preferred. However as you well know that is only part of the story. and to the great uneducated masses about CNC it sounds good.
What I pointed out that it's not always as good as many including you crack it up to be! There are many variables and many different quality of operating systems and base machines never mind in the tooling used. Obviously I was wrong on that score.Īs I am the most likely person on here to try and point out the truth about CNC machining however please point out where I said it was no good?