chinese atc spindle ?

[NordicCnc]

Yes, the Spindle is 220V and it doesn't have any drive keys, very few of the lower end ATC router spindles have them. This machine won't ever use large tooling other than surface cutter which will be light cuts so it's not a problem.

Here's a quick and dirty Video of it changing tools, tool change time is on low for testing purposes but I'll tweak the macro and bump it up when I'm happy it's all aligned properly, still got bit of tweaking to do.

Excuse the wires and pipes hanging down everywhere the machines still very much a work in progress. The Z-axis will have a cover and all the pipes/wires, etc will be trimmed to length and in trunking. The bed as still got to be cut for the Vacuum bed and surfaced but will be left until last after everything is buttoned up and the extraction system is connected. The chips from HDPE are a nightmare and stick-like Sh#T to a blanket so it's a must.

Oh and before anyone says it NO I haven't held camera wrong way up.? It's a Vertical machine.!

I've noticed from some of your other machine builds that you are using a fixed BK12 bearing in both ends of the X-axis (don't know about Y-axis). What is the reason for that?

Also in this video, you are not using any floating bearing on the Z-axis. Is it not needed because of the very short Z-axis length?

[JAZZCNC]

I've noticed from some of your other machine builds that you are using a fixed BK12 bearing in both ends of the X-axis (don't know about Y-axis). What is the reason for that?

I do this on all ball-screws longer than 1000mm on both X & Y. The reason is to lower ballscrew whip, 2 fixed bearings provides more support and also allow the screw to be pre-loaded with tension.

Also in this video, you are not using any floating bearing on the Z-axis. Is it not needed because of the very short Z-axis length?

Not required on ball-screws less than 350mm.

[NordicCnc]

I do this on all ball-screws longer than 1000mm on both X & Y. The reason is to lower ballscrew whip, 2 fixed bearings provides more support and also allow the screw to be pre-loaded with tension.



Not required on ball-screws less than 350mm.

I see. How do you apply the pre-load with 2 fixed bearings? I thought the common way to do it was using a double ball-nut.

Skickat från min SM-A530F via Tapatalk

[JAZZCNC]

I see. How do you apply the pre-load with 2 fixed bearings? I thought the common way to do it was using a double ball-nut.

Skickat från min SM-A530F via Tapatalk

You didn't read it correctly, I said to preload the screw with tension. I'm not preloading the ball nut I'm just putting the screws under tension so it doesn't whip.

[NordicCnc]

You didn't read it correctly, I said to preload the screw with tension. I'm not preloading the ball nut I'm just putting the screws under tension so it doesn't whip.

My bad, thanks for clarifying!

Skickat från min SM-A530F via Tapatalk