Chinese CNC Spindles ?

Very interesting. I have only seen spindles rated at this sort of speed that are air powered, would like to have a go with one of these, but then I would be building a machine I have no use for yet

graham.

Murray it does both, some count chip thinning as the more dangerous of the two ,we certainly did,as if you have a square block it can sit there all day going round and round and round just slicing material off if you dont have a good stock definition say a triangle pocket with round corners the software can still make a hell of a mess of it

I dont need to read up on Solidcam as the research establishment i worked at is one of the places that actually developed the core that is sold to other cam companies (i do like to ask dumb questions of the HSM works guys though as they simply have adaptive and that is all)  ,you might note i wrote constant tool engagment, with this comes constant chip load you would never purposefully say stepover 2mm and 1mm in the same cut for example though this could happen due to geometry of the cam part and what ha been removed from the stock , in the background the chip thinning is also being monitored on entry exit and around corners and where a previous cut has left a situation where it might be 2mm in one place and 1mm further down where it could exceed the limitations you notice its arcing spline like toolpaths with differing stepovers ,

also because its monitoring chip thinning there is no speed reduction in or out of corners book speed might say 400mm a min feed a controller also might slow this using g codes when it sees a G02 or G03 but when your watching a cutter doing 5 times this feed in and accelerating out because its adjusted for loads and thinning you start to see the benefits in cycle time

Dont get me wrong i can test the same cutter with 15mm doc 5mm woc in en24t and it will cut the job but i need hp and torque with adaptive and constant chip load/thickness i need less horsepower and torque as the cut is still full depth but as its taking a smaller bite of the cherry with much faster feeds theres a reduction in cycle but no increase in the loads the cutter sees, hence much smaller machines can be as productive as big machines that need to hog material

Edited By mike mcdermid on 04/07/2014 11:03:05

Edited By mike mcdermid on 04/07/2014 11:04:44

Edited By mike mcdermid on 04/07/2014 11:06:17

Ha Oompa - since when did we have to have a use for all of our creations

(unless of course the conversation is with the domestic authority ........)

Will

It's alive ......

Chinese spindle is now fitted to the machine, wired up and the VFD configured without a hitch.

So now it's running. It's quiet and smooth, but I have not actually tried cutting anything yet.

Will use it in anger in a month or so.

Cheers - Will

Just to finish off....... the spindle ran properly today under computer control with success.

It's plumbed in and squared up as accurately as I could.

The spindle works well and ran for a couple of hours without load to run it in without any increase in temperature at all. I cut a couple of shapes in plastic then a profile in aluminium with a 1.5mm cutter - cutting speed too slow on first attempt, but turned the wick up to 15k RPM and the finish and accuracy was spot on.

So, I'm now a very happy bunny !!

Finishing an air curtain for it now and need to seal a couple of areas for the cutting fluid and it's ready to go

Cheers - Will

I have just fitted a SIEG X3 Mill with a 3Kw, 3 phase motor and VFD that runs up to 24,000 RPM. I needed 8000RPM for an aluminium (HE30) machining job with 3mm cutters. I bought the motor and drive from www.CNC4You.co.uk and am extremely pleased with the drive and the support from the company. I have no connections with them apart from my experience as a satisfied customer. I haven't checked the run out yet but the 3mm FC3 cutters are lasting well with coolant and compressed air to help with chip clearance. The drive motor cannot be run without cooling and CNC4YOU sell a suitable pump for this purpose, although the water barely gets warm when run for several hours ( 20 litres of water in the system ).  I intend to mount all the electronics in a separate cabinet when I have time so please forgive the temporary lash up, it is running a paying job so needs must!  I am using Mach 3 for control and intend to upgrade to a motion controller board ( also from CNC4YOU ) to use the USB port on the PC rather than the parallel port as I can then run more I/O using interface driver boards connected to the motion controller.

Good luck with your efforts.

Andrew

Doesn't look as though my link to a photo of my mill has come through so here is the link :- https://www.dropbox.com/s/iw2sh3dsggoaafb/100_2577.JPG?dl=0

Edited By Andrew Binning on 13/09/2014 19:08:35

I know this is a very old thread but I have nearly finished the control system rebuild that I was planning when I wrote my original post on this topic. The Mill is still performing well and subsequent support from CNC4You.co.uk has been invaluable. Helpful advice given and a faulty part on the Drive Inverter was replaced for the cost of the postage!

The control system was built in an off the peg wall mounted housing which although it cost just over £100 ( sourced from RS components) was worth the expense and time saved in making a cabinet.

Although the mill was originally bought as a hobby project, a commercial job came up which required the milling of a small cube of aluminium with bored holes on three faces to close tolerances. I have subsequently produced nearly 600 of these parts and the individual machining time was about 15 minutes each. This job alone paid for the original mill investment !

Could you post or re-post a photo of the motor spindle mounted on the X3 please.

The motor spindle is available from cnc4you.co.uk. I have no connections with this company apart from having received excellent support and good products. The chuck on the spindle is an ER20.