HURCO BMC-20P retrofit

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23 Sep 2019 08:15 #145934 by tommylight
Replied by tommylight on topic HURCO BMC-20P retrofit
7i92
7i77
7i74
7i70
7i71
I did not push it over 24 m/m, left it at 9m/m.
It had 2510 ballscrews, so plenty of speed.

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07 Jan 2020 11:34 #154203 by bruno2626
Replied by bruno2626 on topic HURCO BMC-20P retrofit
Hi tommylight,
I have a Hurco BMC40, and I just became to retrofit with Linuxcnc and 5i25 + 7i77 Mesa cards.
I have the same problem as you with the spindle drive, the F600 error at power on. Can you tell me what you did to solve this problem?
Have you finished retrofitting your Hurco?
Thanks.
Bruno

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07 Jan 2020 12:31 #154208 by tommylight
Replied by tommylight on topic HURCO BMC-20P retrofit
The VFD has a small board inside with yellow wires and 2 small transformers, had to solder those pins as one of them had a cold contact, but still had other issues, it would work for 2 to 4 days non stop and all of the sudden would error as under/over voltage. The owner never got a new drive so it was used like that for a while, now i do not know what the status is as i have no access to it any more.
My advice, get a new VFD, it is a risk using the old one. I had 2 working servo drives when i started retrofitting it, by the time i was done both of them crapped out. They do not like to be left unused for long periods of time, pity as the Yaskawa makes some very nice drives.
Beware that if you have to change the drives, you will most probably have to change the encoders or motors also, the original Yaskawa encoders are not standard incremental ones. And removing them from the motors was a PITA!

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10 Jan 2020 20:09 - 10 Jan 2020 20:10 #154572 by bruno2626
Replied by bruno2626 on topic HURCO BMC-20P retrofit
Thanks tommylight.
It is possible that I have exactly the same problem! (cold contact on the same board). Today, I got to drive the spindle, but the vfd still doesn't start all the time.
I would prefer not to have to replace the vfd, much too expensive!
Last edit: 10 Jan 2020 20:10 by bruno2626.

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10 Jan 2020 20:46 #154576 by tommylight
Replied by tommylight on topic HURCO BMC-20P retrofit
Leave it on and spinning at some low speed all day every day.

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14 Jan 2020 21:40 #154847 by bruno2626
Replied by bruno2626 on topic HURCO BMC-20P retrofit
Hi tommylight,
Today, I test the orient command of the spindle, it works well.
I'm starting to think about changing tools. I looked at your files, I don't understand the remap.py. It's empty?
Thanks

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14 Jan 2020 23:39 #154858 by tommylight
Replied by tommylight on topic HURCO BMC-20P retrofit
I remember using Carousel comp made by Andy for sure, but i do not remember why and how i used remap.
I also recall it having an index pin and a pocket pin ( pin=switch=sensor) and a relay board that controlled the tool changer that after a bit of cleaning and service got to work nicely again after wiring it to 7i77/7i70/7i71.

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