1.7*0.74*0.4m Mill / Router building...

[Jonathan]

holy sh** jonathan !! i guess thats what you pay the extra for... my best X axis rapid is 1500mm/min

Question: do i need to keep my axis rapid speeds the same as my Y will run at 2000mm/min ?

Indeed, I'm not regretting buying that ballscrew now - £50 well spent. I'm not sure how often that speed will be useful though...could maybe drill something really fast!

I've got all the axis' at different speeds on my milling machine, so no you don't need to keep them the same. I'm using about 1800mm/min for the X axis on my mill. It will go maybe 20% higher, but it's not reliable at that speed any more. Possibly the ACME screws are getting worn (backlash has certainly increased) but I'm not sure if that would reduce the rapids.

[blackburn mark]

cheers jonathan :)
i did a couple of cuts in alli and delrin yesterday, nowt spectacular, small pocket with a 3mm single flute,,,,, tickled me pink though to see it work.... my optimisme shot through the roof
i may just get there yet :)

[Jonathan]

Good to hear that yours is working. I've not tried a single flute cutter yet, perhaps I should. I did the bearing mounts with a 2 flute 5mm cutter using 1mm depth at 200mm/min. Took a while to cut through the 1" aluminium, however it didn't require cutting fluid which left me free to leave it running whilst I made other bits :)

I've finally bought the ER16 collet chuck and set of collets for my big brushless motor. I thought that it'd compliment a kress spindle nicely when I can afford one of those since this motor will do up to 6000rpm, and the kress from 5000 to 25000rpm.

[Meant to post this hours ago - helps if I remember to press 'post' after typing!]