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Bridgeport series 2 interact 2
Posted: Fri Jan 10, 2025 12:48 pm
by Snap-On Phil
I have a post in the acorn area. But I’m kinda thinking about the Oak or possibly the AllNOne. Anyone here swapped out one of these machine to one of these. What’s the benefits of one over the other.
The machine is a early 1990’s Bridgeport series 2 interact 2 (similar to the Boss ) 5000# frame with 2HP spindle 3axis with power draw bar and power quill , spindle stop, lots of options on this machine. Currently can’t get the Heidenhain controller to allow me to run axis of motor. I’ve been told it was in use till stored ( inside climate controlled ) about 2 years ago. Machine doesn’t appear to have been misused no crash marks on table and all the scrapings are very pronounced in good shape.
Looking to make a little more modern with as tight as I can have this machine run.
Re: Bridgeport series 2 interact 2
Posted: Fri Jan 10, 2025 11:51 pm
by me239
I just posted earlier here with my Bridgeport series 1 Boss 6 that was converted to Centroid CNC10 back in 2005. From what I understand, you'll have to determine if you have steppers or servos (not too knowledgeable on the interact 2, but a google search says servos) and that will really decide what you can do. With steppers you can upgrade way cheaper with something like an Acorn and basic stepper drivers, but servos get a little more complicated. They make servo drivers that "convert" them to a step/dir interface, but you lose the precision of an analog control from what I understand, and that's what you'd need to use an Acorn with it. I'm looking at the Allin1DC to swap my old system and reuse my servos to their full potential.
Re: Bridgeport series 2 interact 2
Posted: Sat Jan 11, 2025 10:26 am
by Snap-On Phil
Yes I’d like to keep it as precise of a machine as possible. Making sure what route to go.
Re: Bridgeport series 2 interact 2
Posted: Sat Jan 11, 2025 6:36 pm
by me239
Then the Allin1DC is probably the way to go. I ordered mine last night and am eagerly awaiting. The alternative is to use something like LinuxCNC with VPX cards to communicate with 3rd party servo drivers. More costly, more wiring, and more complicated, but technically future proof and you don't have to worry about licensing. There's also the Oak board that is similar to the Allin1DC, but you provide your own drivers which you already have. Downside is you need new encoders to make sure you have 2000 line/ 8000 count per revolution resolution, which are a pretty penny themselves from Centroid. So options:
1) Allin1DC:
-Replaces your drivers and controller
-95% chance you need new encoders too (price not included)
$1856
2) Allin1DC Bridgeport kit:
-Comes with new servos and controller/driver
-No compatibility questions
-Most expensive
$6189
3) Allin1DC Upgrade kit:
-Same as regular Allin1DC, but with new encoders
$3275
4) Oak board:
-Reuse DC controllers and servos
-Need new encoders
$1395 + $275*3 = $2220
5) Acorn board:
-Reuses only servos
-No new encoders needed
-Need 3rd party servo drivers (eg. Gecko320X)
-Cheapest option to get your machine making parts
-Likely underpowered for your servos (80VDC max on the Gecko320X while Centroid servos are 120VDC, so 2/3 power)
-Some accuracy lost with the digital to analog step/dir conversion (how noticeable? No idea)
$363 + $138*3 = $777
6) Cheapest "Giter-goin" conversion:
-New cheap NEMA 34 motors and drivers
-Arduino controller with GRBL
-Possibly need adapter plate and flex-shafts
$10 (arduino) + $130 (3x NEMA 34 kit) + $15 (shaft collars) = $155
Not included is the LinuxCNC cause the sky is the limit, but expect to end up in the $2k mark.
Re: Bridgeport series 2 interact 2
Posted: Sun Jan 12, 2025 8:37 am
by Snap-On Phil
me239 wrote: ↑Sat Jan 11, 2025 6:36 pm
Then the Allin1DC is probably the way to go. I ordered mine last night and am eagerly awaiting. The alternative is to use something like LinuxCNC with VPX cards to communicate with 3rd party servo drivers. More costly, more wiring, and more complicated, but technically future proof and you don't have to worry about licensing. There's also the Oak board that is similar to the Allin1DC, but you provide your own drivers which you already have. Downside is you need new encoders to make sure you have 2000 line/ 8000 count per revolution resolution, which are a pretty penny themselves from Centroid. So options:
1) Allin1DC:
-Replaces your drivers and controller
-95% chance you need new encoders too (price not included)
$1856
2) Allin1DC Bridgeport kit:
-Comes with new servos and controller/driver
-No compatibility questions
-Most expensive
$6189
3) Allin1DC Upgrade kit:
-Same as regular Allin1DC, but with new encoders
$3275
4) Oak board:
-Reuse DC controllers and servos
-Need new encoders
$1395 + $275*3 = $2220
5) Acorn board:
-Reuses only servos
-No new encoders needed
-Need 3rd party servo drivers (eg. Gecko320X)
-Cheapest option to get your machine making parts
-Likely underpowered for your servos (80VDC max on the Gecko320X while Centroid servos are 120VDC, so 2/3 power)
-Some accuracy lost with the digital to analog step/dir conversion (how noticeable? No idea)
$363 + $138*3 = $777
6) Cheapest "Giter-goin" conversion:
-New cheap NEMA 34 motors and drivers
-Arduino controller with GRBL
-Possibly need adapter plate and flex-shafts
$10 (arduino) + $130 (3x NEMA 34 kit) + $15 (shaft collars) = $155
Not included is the LinuxCNC cause the sky is the limit, but expect to end up in the $2k mark.
I noticed you didn’t mention the “ Hickory “ it looks like a possibility ? Board and Leadshine EL7 EtherCAT Drive, Motor and Cable Package.
But I’m not sure what size frame servos it takes.
Would there be any performance increase or precision tolerances deference between using the AllNOne vs Hickory . I’m in between these 2.
As using new cards and drives sounds better just because I am messing with over 30 year old machine, and if I’m removing servos either way,
Any thoughts on this.
Re: Bridgeport series 2 interact 2
Posted: Sun Jan 12, 2025 10:28 pm
by me239
I didn’t mention it cause I’m not too familiar with it, but I know it needs new, separate drivers. EtherCAT definitely sounds neat and easy, but it’s just extra parts to buy in my opinion. The Allin1DC comes with the drivers and reuses the motors, so it’s just a bit simpler in my opinion for retrofitting a CNC with good servos already. If you don’t plan on keeping the DC servos, by all means go with the Hickory and ethercat as it looks way easier to setup from nothing and provides more flexibility. Being a servo with encoder and only difference being AC, I don’t see why these would be any more or less accurate than a DC servo setup. If I had to get rid of my servos, I’d probably go this route too. As for motor size, I haven’t looked into their sizing scheme but take a motor off and measure.
Re: Bridgeport series 2 interact 2
Posted: Mon Jan 13, 2025 12:49 pm
by centroid467
ALLIN1DC would be a good solution for this, as Keith and everyone else stated in your other thread. Of course, that depends on whether your existing SEM MT30R4 motors are still any good.
To know whether you need to replace the encoders or not, you'll need to find the part numbers. The encoders may be under a cap on the back of the motor or on the ball screw itself.
I do agree that if you find you need to replace the motors then Hickory would be the easiest solution. From this document:
https://forum.linuxcnc.org/media/kunena ... pdf#page=8, it seems the motors have a 75mm bolt hole circle which puts it similar to 60mm frame size AC servos with a 70mm bolt hole circle. However, I would recommend going for larger servos to ensure you can match the torque, speed, and inertia specifications of the existing motors and transmission system. You'll need an adaptor plate of some form.
If I was going to switch this machine to Hickory, from the motor specifications, I would select the Leadshine 1300w drive and motor package we have listed here:
https://shopcentroidcnc.com/shop/cnc-se ... e-package/
Re: Bridgeport series 2 interact 2
Posted: Tue Jan 14, 2025 9:35 am
by Snap-On Phil
centroid467 wrote: ↑Mon Jan 13, 2025 12:49 pm
ALLIN1DC would be a good solution for this, as Keith and everyone else stated in your other thread. Of course, that depends on whether your existing SEM MT30R4 motors are still any good.
To know whether you need to replace the encoders or not, you'll need to find the part numbers. The encoders may be under a cap on the back of the motor or on the ball screw itself.
I do agree that if you find you need to replace the motors then Hickory would be the easiest solution. From this document:
https://forum.linuxcnc.org/media/kunena ... pdf#page=8, it seems the motors have a 75mm bolt hole circle which puts it similar to 60mm frame size AC servos with a 70mm bolt hole circle. However, I would recommend going for larger servos to ensure you can match the torque, speed, and inertia specifications of the existing motors and transmission system. You'll need an adaptor plate of some form.
If I was going to switch this machine to Hickory, from the motor specifications, I would select the Leadshine 1300w drive and motor package we have listed here:
https://shopcentroidcnc.com/shop/cnc-se ... e-package/
So I’m pretty sure I’ll be going with the Hickory , do I need to buy linear encoders also ? Looking at possibly the Yaskawa sigma 7 or leadshire. If I go the
Yaskawa sigma 7 does anybody know what part numbers for the motor and controller are
Re: Bridgeport series 2 interact 2
Posted: Tue Jan 14, 2025 10:18 am
by centroid467
Hickory does not require linear encoders but if you find you need them to reach your desired performance then you can add them later.
We have Yaskawa drive, motor, and cable packages available here:
https://shopcentroidcnc.com/shop/cnc-ac ... s-package/. You can also reach out to DIY sales to place your order. From the specifications of the SEM servos currently mounted, I would suggest the 1 kW or 1.3kW packages.