Ebay Chinese Routers (CNC3040) - anyone purchased one of these machines recently?

[Tenson]

I thought I'd share a couple pictures of what my eBay CNC3040 was doing today. This was making a pocket in 6061-T6 (heat-treated and artificially aged) aluminium.

Initial go-around.



Pocketing

[Jonathan]

Finish looks respectable on the flat, but a little rough on the sides?

Looks like a 2flute HSS cutter? What diameter, spindle speed, feedrate, depth of cut and stepover did you use out of interest?

My machine is currently running cutting a huge aluminium sheet at 780mm/min with an 8mm single flute carbide at 2mm depth of cut. It's been going for hours at that...

[JAZZCNC]

I thought I'd share a couple pictures of what my eBay CNC3040 was doing today.

I'm amazed that spindle managed that and will be even more amazed if it survive's cutting more than 3 before giving up the ghost.!!

My machine is currently running cutting a huge aluminium sheet at 780mm/min with an 8mm single flute carbide at 2mm depth of cut. It's been going for hours at that...

Don't it break your heart seeing all that expensive Aluminium turn into expensive floor glitter.!!

[Jonathan]

Don't it break your heart seeing all that expensive Aluminium turn into expensive floor glitter.!!

I've estimated it's about 25kg of swarf from this sheet once the 30 hour program has run! Then there's the other side...

[Tenson]

I'm amazed that spindle managed that and will be even more amazed if it survive's cutting more than 3 before giving up the ghost.!!

It's done 2... more to go!

The spindle is definitely too low power for this stuff. It was sooo slow. 3 hours to do a 60mm square 8mm deep pocket. Still the motor actually sounds smoother than before.

[Tenson]

Its a 2 flute solid carbine 3mm bit from Cutwell. Done very slowly indeed at 65mm/min and 0.5mm cut depth. I think I could have done it at 1mm cut depth for the pocketing, but I didn't want to push it since the cutter already snapped once finding a good speed! I also put some marker points where I need to drill holes; much quicker to make holes with the pillar drill.

Still, the machine ran for about 3 hours no problems :)