operation cnc

[wilfy]

if you ever struggle to think of electronics and need to use examples always use water... it's far easier.

i.e. example 1 you have 1 hose pipe(outgoing signal) with a splitter in the end to make 2 outlets (2xsteppers)... water reaches the splitter and splits equally between the 2(both steppers get the same signal)

example 2 you have 2 hose pipes connected straight to 2 outlets and the flow of these is restricted by a computer, something goes wrong with the first outlet and the flow is slightly restricted at the wrong time compared to outlet 2.. you now have one pipe pouring more water than the other (one stepper moving out of sync to the other.

it's just limiting the possibilities of things going wrong. i understand what jazz is on about and i "go way back" with computers

[D.C.]

if you ever struggle to think of electronics and need to use examples always use water... it's far easier.

i.e. example 1 you have 1 hose pipe(outgoing signal) with a splitter in the end to make 2 outlets (2xsteppers)... water reaches the splitter and splits equally between the 2(both steppers get the same signal)

example 2 you have 2 hose pipes connected straight to 2 outlets and the flow of these is restricted by a computer, something goes wrong with the first outlet and the flow is slightly restricted at the wrong time compared to outlet 2.. you now have one pipe pouring more water than the other (one stepper moving out of sync to the other.

it's just limiting the possibilities of things going wrong. i understand what jazz is on about and i "go way back" with computers

except this is a false analogy.

If you 'go way back' with computers and understand what you are talking about perhaps you can explain what is wrong with what either I or Jon said in this very specific instance.

Does a piece of software running on a computer have magical pixie hero men inside of it that create a 'magical physical hardware' perfect connection between the software and the cnc machine or does a computer use a piece of software (often called a driver) to decide in 'software' which signals to send to which lumps of metal?

If 'hardware' is somehow so much reliable than 'software' and desirable perhaps you could explain why mission critical systems use ECC ram, or why we need transactionable databases or why TCP has to sit on top of IP?

[kingcreaky]

if you search for 2.2kw spindle on ebay... you will notice they are all portsmouth based suppliers. It appears there are multiple suppliers but Im sure its just one place selling them.

Over the course of the past 4 days, I have messages 7 individual suppliers. asking them to confirm they have stock, are they shipping from the uk I have recieved NO responses.

Most of them are 'make an offer' so ive tried making an offer say a tenner below the asking price, again NO responses.

You will notice that essentially the price is £252, some of them are a straght 252, some of them are £162.00 with 90 postage and all the variations under the sun. However I just cant get a response from them so im hardly willing to send them money.

Which leaves me with cnc4you.. who are offering a bargain price of £369 however they are uk based and offering a direct warranty

or Chai has quoted me in his "best price" kinda way £310 plus £60 postage

are there any other options? ive googled 2.2kw spindle with not much luck... thought id check with you lot before I order

Matt