Allin1DC and Fanuc Yellow Cap DC Servos
Posted: Sun Jan 10, 2021 7:38 pm
A little background... I have a small hobby mill that I run an Acorn on, and I love it. It, matched with CNC12 is a fantastic product, and bang for buck I don't think you can beat it. I got tired of the machine (not the control), and wanted something with real rigidity.... So I bought a 1983 Takisawa MAC V2 for a tiny fraction of what I paid for my hobby bench top mill and I need to get it going on a very tight budget. Hopefully after it is running I can sell the hobby mill and pay for some upgrades on the Takisawa!
The Takisawa has a Fanuc yellow cap 20M on the Z axis (18a constant stall, 23Nm, 213v, 1500RPM pulse encoder), and 10M (12a constant stall, 12Nm, 165V, 1500RPM, pulse encoder)
I read that I could run the 10M servos at 80% capacity, but I can't find anything for the 20M servos. I can find that centroid recommends an AC/DC-60 for those (out of a centroid retrofit manual) , but they are $$$. Is it possible to run these off the Allin1 to get started, and maybe upgrade to a different drive later?
Also, I will need a power supply for these. The Centroid rectifier (PN 12726) only says how many in-lbs it is good for... considering there are 8.85in-lb to each Nm, I would need one of these for each drive? Is that correct? It' d be way easier to just know how many amps it's good for!
I'm obviously in the information gathering stage at this point and am open to other options. I've even considered finding new DC drives that can take step/dir and running another Acorn. However that is really limiting considering I will eventually need to get the tool changer working (not right off the bat). I've also considered new motors/drives, something more modern, but it's just not in the budget.
Any help/input would be great. I'd like to stick with centroid since that is what I know (and trust).
Thanks,
PZ
The Takisawa has a Fanuc yellow cap 20M on the Z axis (18a constant stall, 23Nm, 213v, 1500RPM pulse encoder), and 10M (12a constant stall, 12Nm, 165V, 1500RPM, pulse encoder)
I read that I could run the 10M servos at 80% capacity, but I can't find anything for the 20M servos. I can find that centroid recommends an AC/DC-60 for those (out of a centroid retrofit manual) , but they are $$$. Is it possible to run these off the Allin1 to get started, and maybe upgrade to a different drive later?
Also, I will need a power supply for these. The Centroid rectifier (PN 12726) only says how many in-lbs it is good for... considering there are 8.85in-lb to each Nm, I would need one of these for each drive? Is that correct? It' d be way easier to just know how many amps it's good for!
I'm obviously in the information gathering stage at this point and am open to other options. I've even considered finding new DC drives that can take step/dir and running another Acorn. However that is really limiting considering I will eventually need to get the tool changer working (not right off the bat). I've also considered new motors/drives, something more modern, but it's just not in the budget.
Any help/input would be great. I'd like to stick with centroid since that is what I know (and trust).
Thanks,
PZ