I'm musing on a cnc project and quite like the look of an old Boxford CNC as a starting point. Are they so geared towards education that they're not much use for anything else or are they a fair starting point? If so what sort of price range does a softwareless one fetch?
They are geared towards education but with a brain transplant whatever they were designed to do is now immaterial.
I have seen them from £350 up to over a grand. Bear in mind a decent cutoff point ought the be around the £500 mark as beyond that factoring in new motors, tired and old spec, drives, same, plus the transplant all you are buying is some Iron and a couple of ballscrew's. You can buy an ML7 for £350 / £400 and use that as a starter point.
The Boxford's I have seen have all really been rather too light weight to do much with. That's why I wasn't too sad to let my Denford ORAC go before the aborted move - just too small to do much with in the real world - though perhaps ok for a model engineer.
Colchester CNC lathes seem to go cheap as chips at machinery auctions and could be a better starting point.
I have two of the TCL125's I am converting these for production work, mainly in Acetal. For this kind of work they are great.
I also use a couple of Emco C5 cnc's. These are also ok, but very overrated, especially the prices they seem to fetch on ebay. My later one will go on ebay sometime, as it's earnt it's keep manytimes over. One of the Boxford will replace that one.
You do as John says, have to factor in a conversion. the original elctronics are terrible. Unipoler stepper drives with current limiting resistors that have a habic of getting so hot they desolder themselves !
The DC spindle drive is fragile too. Much better to use a VFD and 1/2
- 3/4 hp AC motor.
With modern drives and Mach3 software they do become transformed. Mine have DC servo's now and are very fast. But thy need to be I'm doing work that should really be run on swiss auto's.
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