ATC for the Bridgeport mill

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Re: ATC for the Bridgeport mill

Postby Derek » Fri Jun 15, 2018 10:32 pm

Is the gearbox up in the knee turning the ball screw?

Can you post the part number of the gearbox you are using? Eventually the Alliant is going to crap out and the system I have on the Bridgeport works well but it was a lot of work to produce.
The system you are using looks really nice.

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Re: ATC for the Bridgeport mill

Postby cncdrive » Fri Jun 15, 2018 10:38 pm

Hi Derek,

You can see it better on the attached picture.
I can't find an order email wit hthe type number now, my collegue used to order these, so I can ask next week.
But I found a drawing from Neugart, please check the attached pdf.
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Re: ATC for the Bridgeport mill

Postby cncdrive » Fri Jun 15, 2018 10:40 pm

And if you will order one of these or similar then order it from the French Neugart.
The company, the manufacturer is German, the French are just their distributors in France, but the Germans give far higher quotes is what we learnt.
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Re: ATC for the Bridgeport mill

Postby Vmax549 » Fri Jun 15, 2018 10:45 pm

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Re: ATC for the Bridgeport mill

Postby cncdrive » Fri Jun 15, 2018 10:46 pm

Hi Terry,

Yes, it looks very similar.
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Re: ATC for the Bridgeport mill

Postby Derek » Fri Jun 15, 2018 10:52 pm

So you have a servo driving a gearbox driving a timing belt driving a ball screw.At least that's what it looks like. Was this for clearance or performance. Looks like a very clean solution. plus no air assist from what I can see.
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Re: ATC for the Bridgeport mill

Postby cncdrive » Fri Jun 15, 2018 10:57 pm

Yes, it is how you described it. It was for clearance, I mean if it was possible to install it without the gearbox then we would do that, because the gearbox is costy, but the space is tighter there as it looks for first sight, especially because the table can move down making the space even smaller, so the 90° rotation of the motor was nessessary. And also a higher gear ratio was nessessary to have enough torque to move that heavy table than what was possible with a single timing belt gearing.
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Re: ATC for the Bridgeport mill

Postby andrewbishop66 » Sun Jun 17, 2018 8:28 pm

excellent picture says a thousand words
is that just an acme/trapezoid thread as the backlash would be eliminated by the table weight would be my thought

Thanks andrew
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Re: ATC for the Bridgeport mill

Postby cncdrive » Sun Jun 17, 2018 9:00 pm

Andrew,

No, that is a ballscrew.
If I recall it is a 32x5mm ballscrew, so it has a high diameter compared to the pitch is why you can think it is an acme screw, but it is not, it is ballscrew. :)
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