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March 20, 2019, 00:46:25 am


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Author Topic: High Speed ATC Spindles  (Read 827 times)
dh42
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« Reply #30 on: March 17, 2019, 03:12:40 am »

Ok, it works like a double acting pneumatic/hydraulic cylinder.

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« Reply #31 on: March 17, 2019, 03:32:05 am »

Yep.  I'm sure its a double acting pneumatic cylinder.  Don't know why I struggled with this.  I have virtually the same setup on top of the spindle on my Tormach mill.  

The valve by the way that I need is called a 2 position 5 port changeover valve.  And I have one.  

I also have some simple one way solenoid valves on the shelf for the other stuff.  What I don't have is three spare regulators for the three different air pressures it requires.  72-87 PSI for the tool changer, 29-36 PSI for the air seal, and 43-58PSI for the dust removal blast.  
« Last Edit: March 17, 2019, 03:36:17 am by Bob La Londe » Logged

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« Reply #32 on: March 17, 2019, 11:13:20 am »

Does this spindle fit into the head casting of the mill, or are you going to fabricate a replacement mount?
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« Reply #33 on: March 17, 2019, 12:04:43 pm »

Bob, that makes complete sense.  In this case "return air" means "return of the cylinder", not return of air.

Yes, what you're describing is usually called a 3-way valve.  But remember there are 2-position 3-way valves, and also 3-position (center-off) types.  There are even two and three-way 'stable' valves that will stay in whatever position they're sent to by a momentary actuation pulse.

I'd believe yours needs to be 3-way, 2-position, using constant actuation air signals.

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Bob La Londe
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« Reply #34 on: March 17, 2019, 15:25:54 pm »

Does this spindle fit into the head casting of the mill, or are you going to fabricate a replacement mount?

Should be an exact fit in this case.  The head was manufactured for and has an 80mm 24K spindle in it.  I've replaced the spindle before.  This spindle is also 80mm.  I have two other mills with similar heads.  One is exactly the same, but the third has a 62mm spindle.  When I had to replace that one it took a while to find a replacement.  I've seen a 61.95mm ATC spindle before that I could use in that one, but lately I have not been able to find it.  

Well, not quite an exact fit.  I either need to leave the top cover off the head or cut a hole in it as this spindle is quite a lot longer.  I may make a "tall" top cover for the head eventually.  
« Last Edit: March 17, 2019, 16:45:00 pm by Bob La Londe » Logged

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« Reply #35 on: March 17, 2019, 20:15:43 pm »


Part 2

https://youtu.be/MUFz-p48FpA
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dh42
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« Reply #36 on: March 18, 2019, 01:35:04 am »

Hello

An interesting video about an ATC on a (big) BZT and dust shoes.

https://www.youtube.com/watch?v=ycIlpIX0kKM

This add some complications for woodworking because in addition you need to manage the dust shoes.

Bob, for metal working, how do you handle the cooling tube orientation to match with the tool length/size ? (if I well understand, you already have an ATC on another machine ?)

edit: what is the blue box on your video (I don't understand spoken English  Embarrassed)

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« Last Edit: March 18, 2019, 01:46:23 am by dh42 » Logged
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« Reply #37 on: March 18, 2019, 14:05:38 pm »

Hello

An interesting video about an ATC on a (big) BZT and dust shoes.

https://www.youtube.com/watch?v=ycIlpIX0kKM

This add some complications for woodworking because in addition you need to manage the dust shoes.

Bob, for metal working, how do you handle the cooling tube orientation to match with the tool length/size ? (if I well understand, you already have an ATC on another machine ?)

I had an ATC on a machine, but I was not happy with it.  I now have an ATC resting on the floor.  I run two locline nozzles for coolant, and if necessary I adjust them.  When I was running the ATC I would adjust for "most tools" so that the spray hit high on longer tools and just short on shorter tools. 
Quote

edit: what is the blue box on your video (I don't understand spoken English  Embarrassed)

DIN rail mounted 12VDC power supply.  I picked up several of them at auction for a few dollars each some years ago.  Its a neat power supply.  100-240V AC input.  12VDC regulated 5 amps output. 
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« Reply #38 on: March 18, 2019, 17:54:42 pm »

P.S.  I was going to edit in more subtitles, but to be honest it will all be covered in further videos in the series anyway.  I'm trying to keep them all short. 
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