New Build, PM2700 lathe with Acorn, Videos and Photos <upgraded to AC servos>

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suntravel
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Re: New Build, PM2700 lathe with Acorn, Videos and Photos <upgraded to AC servos>

Post by suntravel »

suntravel
Posts: 833
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Re: New Build, PM2700 lathe with Acorn, Videos and Photos <upgraded to AC servos>

Post by suntravel »

Small upgrade today, replaced the simple set screws in the pulleys with locking assembly COM-B.
Way better torque holding an almost no runout.

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Uwe
tblough
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Re: New Build, PM2700 lathe with Acorn, Videos and Photos <upgraded to AC servos>

Post by tblough »

Much better than setscrews. I use Fenner Trantorque bushing. Same principle, but smaller OD for the same shaft size so they can fit on smaller pulleys.

https://www.fennerdrives.com/trantorque/
Cheers,

Tom
Confidence is the feeling you have before you fully understand the situation.
I have CDO. It's like OCD, but the letters are where they should be.
suntravel
Posts: 833
Joined: Thu Sep 23, 2021 3:49 pm
Acorn CNC Controller: Yes
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CNC Control System Serial Number: 6433DB0446C1-08115074
Location: Germany

Re: New Build, PM2700 lathe with Acorn, Videos and Photos <upgraded to AC servos>

Post by suntravel »

tblough wrote: Mon Apr 25, 2022 4:13 pm Much better than setscrews. I use Fenner Trantorque bushing. Same principle, but smaller OD for the same shaft size so they can fit on smaller pulleys.

https://www.fennerdrives.com/trantorque/
Thea are called Locking assembly TT by my dealer:

https://www.maedler.de/Article/61550110

For some reason higher price-tag than Com-B

Uwe
cnckeith
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Re: New Build, PM2700 lathe with Acorn, Videos and Photos <upgraded to AC servos>

Post by cnckeith »

taper locks are the way to go! nice upgrade.
Need support? READ THIS POST first. http://centroidcncforum.com/viewtopic.php?f=60&t=1043
All Acorn Documentation is located here: viewtopic.php?f=60&t=3397
Answers to common questions: viewforum.php?f=63
and here viewforum.php?f=61
Gear we use but don't sell. https://www.centroidcnc.com/centroid_di ... _gear.html
BillB
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Re: New Build, PM2700 lathe with Acorn

Post by BillB »

suntravel wrote: Thu Mar 31, 2022 3:30 pm Today I set up automatic tool measuring with a modified 3D probe. Way faster than skim cuts, under 30s per tool and ready to go :)



Uwe
Hi Uwe, LOVE IT! going to do the same for my lathe and buy one of these probes for the mill as well. I really hate the skim cut method, LOL. Again thanks for the recommendation on the probe.

I wanted to ask you why you made the shaft of the probe end so long? Shorter would be less run out but I assume you had a reason for how long you made it. Also what material did you make the probe tip in? Stainless?

IS there an off-the-shelf probe tip available that you know of that fits this little probe? I assume you made yours?
suntravel
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Re: New Build, PM2700 lathe with Acorn, Videos and Photos <upgraded to AC servos>

Post by suntravel »

Hi,

you can just use M2.5 Tips made for dial indicators like me.

The shaft is a cheap ER16 Toolholder with 20mm shaft.

Chuck is a precision one from Bison, repeats in a 0,02mm range

Uwe
BillB
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Re: New Build, PM2700 lathe with Acorn, Videos and Photos <upgraded to AC servos>

Post by BillB »

suntravel wrote: Fri Jun 17, 2022 2:16 pm Hi,

you can just use M2.5 Tips made for dial indicators like me.

The shaft is a cheap ER16 Toolholder with 20mm shaft.

Chuck is a precision one from Bison, repeats in a 0,02mm range

Uwe
So much to learn, Im not familiar yet with interchangeable indicator tips. Is the shaft and disk on your set up 2 separate pieces like these?







I see these that are machined as a single part but the disks are really thin, not good for this set up.
suntravel
Posts: 833
Joined: Thu Sep 23, 2021 3:49 pm
Acorn CNC Controller: Yes
Allin1DC CNC Controller: No
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MPU11 & GPIO4D -w/ 3rd Party Drives: No
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CNC12: Yes
CNC11: No
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CNC Control System Serial Number: 6433DB0446C1-08115074
Location: Germany

Re: New Build, PM2700 lathe with Acorn, Videos and Photos <upgraded to AC servos>

Post by suntravel »

Jep first two links, but I use them from Mitutoyo...

Uwe
BillB
Posts: 447
Joined: Thu Jul 15, 2021 1:43 pm
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CNC12: Yes
CNC11: No
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Re: New Build, PM2700 lathe with Acorn, Videos and Photos <upgraded to AC servos>

Post by BillB »

suntravel wrote: Fri Jun 17, 2022 3:44 pm Jep first two links, but I use them from Mitutoyo...

Uwe
Thanks :D
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