5 axis Build
Ive been searching for this type of conversion on the forum and there doesent seem to be any like it that I can find. Anyone know of any that they can point me to?
I have the money and time to do this right now due to low work load so Ill document the build here for others who are interested.
Any recomendations to hardware would be greatly appreciated
Thanks
Jim
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Sounds like a straightforward conversion. Do you know if the drives are +/- 10V controlled?the controller got damaged by a forklift and I am thinking about building my own controler using the existing servos and drives.
You could _probably_ get it working with nothing more than a parallel port and some capacitors and resistors. But the more you add, the better it will be, up to a point.
I think the sensible choice would be to look at Mesa (www.mesanet.com) and Pico (www.pico-systems.com/) There are many, many, other suppliers but those two are well integrated into EMC2 and are both active in the mailing lists and forums.
What you are planning is similar to many other retrofits: wiki.linuxcnc.org/cgi-bin/emcinfo.pl?Case_Studies
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Yes, the drives can be controlled by +-10.
They are pretty good drives. I have them on other machines and they can control position, velocity and torque.
I was looking at something like the 5I22 from mesa and a PCI bussed computer that I already have. Im sure it will be more complicated than you say. There are many limits and other such components to find and wire. But sure beats junking the machine and Im sure ill learn quite a bit in the process.
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Do your axes have encoder feedback?
Sounds like a straight forward conversion ATM.
John
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I had pretty much the same hardware list. Ill call Mesa tomorrow and see what I need to put it together.
Jim
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I was looking at something like the 5I22 from mesa and a PCI bussed computer that I already have
My shopping list would be:
Intel D510MO Mini-ITX Motherboard, 80W PicoPSU, 8GB SSD (probably SATA DOM)
Mesa 5i23 (cheaper than 5i22, better than 5i20 unless you are sure you need 96 IO rather than 72)
Mesa 7i33 Servo interface
7i37TA interface card (possibly two)
Actually, that's not entirely true, I am tight-fisted enough to build my own plug-ins for the FPGA cards, but that shopping list should Just Work.
pncconf should get you a fair way to a working system and configuration inside a few hours.
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John
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You would need two of the Servo cards, but the unused pins from channels 6, 7 and 8 are available as GPIO, and the 8 + 16 (?) pins might be enough.
(Using the unused channels from the servo card would need a split ribbon cable, but can be done)
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What is the purpose of the SSD? Additional memory for the FPGA? Or is it in lieu of a PC?
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