On Tue, 25 Apr 2017, Marius Alksnys wrote:
Date: Tue, 25 Apr 2017 21:39:56 +0200
From: Marius Alksnys <[email protected]>
Reply-To: "Enhanced Machine Controller (EMC)"
<[email protected]>
To: [email protected]
Subject: Re: [Emc-users] Had to re-flash Mesa 7i77 twice
Filtering and sampling rate in HAL:
setp [HM2](ENC)muxed-sample-frequency 4000000
# --- X ---
setp [HM2](ENC)00.filter 1
setp [HM2](ENC)00.quad-error-enable 1
# the same for all axes
We will try to check the voltages.
But how this can happen? Shouldn't the watchdogs disable the outputs
when the communication to the PC is broken?
At least two watchdogs are enabled. 5i25 is set:
setp [HM2](FPGA)watchdog.timeout_ns 10000000
Yes, Either the local FPGA watchdog or the 7I77s serial interface watchdogs
should disable the drives
If you lose serial communication, (possibly due to a FPGA watchgod bite) the
7I77 will turn off its enables in 50 ms
Are you sure the drive enables work? I would check that if you lose serial
comms that the drives get disabled. They should also get disabled if you get a
following error, if this does not happen, something very basic is wrong.
What other replacements would you recommend to try - 5i25, 7i77, MB/PC,
cable, fresh software install?..
04/25/2017 06:33 PM, Peter C. Wallace ra????:
On Tue, 25 Apr 2017, Marius Alksnys wrote:
The only way I can see this (drift) happening (assuming reasonable
following error settings) is encoder counting issues. If drift was the
only issue I would be tempted to enable encoder filtering(if not
enabled) and perhaps lower the encoder sampling rate.
But the drift in addition to the sserial+quadrature errors suggest a
systemic problem, perhaps 5V power to the 7I77 is marginal, or as I
mentioned before you have PC power/PCI issues (the list of sserial
errors you got is not really possible with just a link failure and I
think reflects complete loss of communication to the 5I25 card so the
PCI reads are reading 0xFFFFFFFF and therefore all possible hardware
errors are reported)
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Peter Wallace
Mesa Electronics
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