chinese atc spindle ?

[NordicCnc]

I've not used the air-cooled but I have the Water-cooled version from this seller, in fact, I've just fit 3Kw BT30 model to a machine.

They come with a Fulling 3.7Kw VFD which was a bit of a bear to set up, mostly due to fact the manual gave misleading Info but after a bit of messing around with various settings, I got it working nicely. The manual is actually quite good for a Chinese VFD, probably the best I've seen but like most VFD manuals unless you have experience with VFD's, which I do, they can be hard to get your head around. As Chinese VFD's go it's about as good you'll get and I'm happy enough with, much easier to work on and wire than the Huanyang's because the whole front comes off to give full access to wire terminals, got better cable management as well.

The spindle itself is nice and smooth. The taper is good and the drawbar gets a nice strong grip and releases the tool holder nicely. Taper as Air purge for cleaning and there's separate air curtain to keep dust out of bearings while running.
There are two sensors (PNP) one to detect when the drawbar is open/closed and the other to detect if a tool holder is in the spindle. Also a Temp sensor.

It's quite heavy, think it's about 18Kg. It comes very well packaged in a nice strong wooden case.

For the money I don't think could ask or expect better. Don't get me wrong it's not in the same league as an HSD or Elte. But you could buy 2 or 3 sets for the same price as one HSD spindle alone.

When I've got the machine finished I'll post a video.

Is this a 220V spindle? If yes, I think I managed to find it in their ebay shop: https://www.ebay.com/itm/264448370955?ul_noapp=true

Is the spindle with or without drive keys for the BT30 interface? According to their pictures it is without drive keys, which I can imagine won't be a problem for high speed milling with lighter cuts.

[JAZZCNC]

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.!

[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.!

Looks good man! That vertical mill is cool, I have never seen a DIY version of that before. The customer must have some funny requirements of footprint vs work area!

Did you have to use any counter weight or gas spring on the X-axis?

I am also looking at ATC spindles right now and I have narrowed down my options to two spindles. It will either be the Jianken JGL-100 3.2kW with ISO25 tool interface, or this Rattm Motors RTM100 3kW with BT30. Both are approximately the same price also. I've compared the two (JGL vs RTM):

- 3.2kW vs 3kW
- 4 poles 800hz (2 poles 400hz available) vs 2 poles 400hz
- 4 bearings vs 3 bearings
-1 4.8kg vs 19kg
- ISO25 vs BT30
- 1.27Nm (not sure if this is rated or peak torque) vs 1.9Nm (1.4Nm rated torque)
- 358mm length vs 406mm length

So to the conclusion:

The JGL has lots of positive youtube reviews and is 22% lighter compared to the RTM. The ISO25 tool interface is quite rare compared to BT30. The RTM has no reviews except one 1.8kW ATC spindle video on youtube. Your review is good and so far only shows good things about the spindle. BT30 tool interface is more common than ISO25. Shipping for the RTM is free from VAT since it is within EU!

I am leaning towards getting the RTM spindle at the moment, simply because of the BT30.

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[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.

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[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.

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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!

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