Hurco Hawk 5M Retrofit w/ existing motors

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15 Apr 2018 01:07 #109031 by biqut2
The servo rotates smoothly on battery power. Is there a real quick "sanity check" I can perform to make sure I'm communicating with the 7i77 as well as the 5i25?

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15 Apr 2018 01:23 #109032 by PCW
if you set an output voltage with the open loop test you should be able to read that voltage on the 7I77 outputs

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15 Apr 2018 01:27 #109033 by biqut2
The open loop test doesn't seem to work, can this be done from the command line?

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15 Apr 2018 01:31 #109034 by PCW
Can you launch the pncconf created linuxcnc hal file?

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15 Apr 2018 01:35 #109035 by biqut2
No, it gives me an error about maxscale no being available or something like that. I just noticed this in the 7i77manual:
In normal operation CR1 through CR7 must always be on. At power-up, CR15
should be off and CR16 on. The red LED CR16 indicates a watchdog fault, which is
expected before host communications are established. Once running, CR15 should blink
at about 1 Hz for a 1 KHz update rate, and CR16 should be off. Note: CR15 and CR16 are
only present in revision B or greater 7I77 cards.
CR1 isn't lit on my card.

I have the jumpers set to use the 5v from the host card. Do you think I need to hook up an external 5vcd supply> could that be the problem?

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15 Apr 2018 01:42 - 15 Apr 2018 01:46 #109037 by PCW
Yes, as the 7I77 manual suggests, you can do simple tests with 5V from the FPGA card with a 7I77 but its almost guaranteed not to work well if you attempt to power a number of older (and high power consumption) encoders.

However I would expect some power drop in this case but I still would expect CR1 to be on (since it will light dimly even at ~3V) So you may have a jumpering error or a external short on the encoder wiring so I would check this carefully before proceeding

Jumpering

5V from 5I25
5I25 W2 up
7I77 W5 left

5V from 7I77 TB1
5I25 W2 down
7I77 W5 right
Last edit: 15 Apr 2018 01:46 by PCW.

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15 Apr 2018 01:54 - 15 Apr 2018 01:55 #109038 by biqut2
Right again, as usual, I had W1 up and W2 down, after witching W2 to up I can now get encoder reading through the open loop test, I can also very the correct voltages and switching on the output pins. Still no movement though, I may have forgotten to check one of the limit switches. It'll take just a couple of minutes to recheck that wiring. I can't thank you enough for all the help you've been thus far. I feel like I've very close to having this setup all hashed out.
Last edit: 15 Apr 2018 01:55 by biqut2. Reason: typo

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15 Apr 2018 02:14 #109040 by biqut2
I fixed the limit switch, I had it wired NO and it needed to be NC. It's working now!

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16 Apr 2018 01:27 #109109 by biqut2
Just posting a quick update and big thank you for patiently answering my stupid questions. I've yet to map the ballscrews but tunning looks good to me anyway. I got it to a little better than .0002" which is good enough for the work I do. I read in one post on here that the best case scenario is 2 encoder pulses.Was wondering what you guys thought? Is it good or should I still keep tweaking?
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