0MC (486DX2 High Speed Version) with A16B-2200-0390 Axis card and A/B Encoders


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Thread: 0MC (486DX2 High Speed Version) with A16B-2200-0390 Axis card and A/B Encoders

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    Default 0MC (486DX2 High Speed Version) with A16B-2200-0390 Axis card and A/B Encoders

    Folks,

    I'm starting a new thread for this just so its easier to find in the future, should someone else run into this problem. Does anyone know how to get the A16B-2200-0390 axis card on the high speed version of the 0MC working with A/B pulse coders? The manual suggests digital servo software needs to be modified for this card to do A/B support. Anyone on here have the knowledge and tools to help get that sorted out? I can't swap to the 0360 A/B card because it apparently isn't supported with the high speed CPU.

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    Default Re: 0MC (486DX2 High Speed Version) with A16B-2200-0390 Axis card and A/B Encoders

    OK, So I decided to try something just to see what would happen. I'm sure this will make some folks cringe, but I figured it had about a 50/50 shot and I'd learn something no matter what. I pulled the 9046 digital servo eeprom from the new 0MC control and dropped in one with version 9030 that I had backed up from the Miyano. The Miyano is also a 32 bit control, so I figured it probably couldn't hurt. Lo and behold, changing to the 9030 software in conjunction with the 0390 card actually works (sort-of). The serial encoder errors disappeared, I was able to bring up the machine and it jogs around, homes, etc. The big difference is that the restored servo configuration values lead to servos that are whining a bit. This leads me to two possibilities. 1. Version 9030 digital servo software doesn't really support this configuration (likely). 2. The new high speed CPU control runs a tighter control loop and therefore the tuning values may need to be adjusted to match the control.

    Would anyone happen to know?



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    Default Re: 0MC (486DX2 High Speed Version) with A16B-2200-0390 Axis card and A/B Encoders

    Fanuc has put out a bit of mixed information on this front. The maintenance manual seems to indicate that servo version 9040 would be correct for either A/B or serial encoders, but other documentation I've come across seems to indicate that 9040 is only for serial encoders. Can anyone clarify this?



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    Default Re: 0MC (486DX2 High Speed Version) with A16B-2200-0390 Axis card and A/B Encoders

    Just as a follow-up to my earlier posts, I have tested this control with both servo 9030 and 9040 versions of the servo ROM and get the same results. After some additional testing, I have found that there are discrepancies between the servo parameters used in the 0-Mate C, 16 bit control and the 0MC 32 bit controls. As such, for anyone else that may ever be in a position to swap out or upgrade in this fashion, be prepared to go through a servo configuration from scratch.



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    Default Re: 0MC (486DX2 High Speed Version) with A16B-2200-0390 Axis card and A/B Encoders

    the 390 cards are nice- serial, alpha, or quad depending on servo firmware mounted... make sure your motor ID is correct for your drive voltage like a 20S can be a 33 or a 52 (IIRC) depending on 6057 or 6058-66 drives. turn on PIENBL and 1PRS (8x03.3&4?), start out with LDINT (8x21?) at 0, theyll usually run fine. recently been swapping A22s in place of 20Ss by playing with 8x42/43- very powerful motor on any drive- even old 6050s



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0MC (486DX2 High Speed Version) with A16B-2200-0390 Axis card and A/B Encoders

0MC (486DX2 High Speed Version) with A16B-2200-0390 Axis card and A/B Encoders