Remora - ethernet NVEM / EC300 / EC500 cnc board

Hello again,First off I want to say thank you for the work that has been done here, and for help that has been given in the past.  One of these days I want to put together a post explaining and documenting the whole process of getting this machine running.   I'm working on a cnc plasma table and at this point it's around 95 percent operational running on a ec500.  One of the last hiccups I'm having is getting the THC running.  I think I'm correct in thinking that the ec500 doesn't have any analog inputs.  We have a standalone proma sd thc, but it doesn't want to work with our everlast plasma cutter.  I've checked the divided voltage coming from the machine while running and it was around 2v /-.  I know there are some really smart and helpful people here, I'm trying to figure out what my best options may be for sending the 50:1 divided voltage into linuxcnc so I can use the THC functions there.  I'm mainly just looking for some direction of where to go here.  If i need to add a arduino or such into the controls to make this work, i may have a couple of those on hand.   Thanks again, Bryson

Thread": "Base",
"Type": "QDC",
"Comment": "QDC Encoder A-IN12 B-IN14 I-IN13",
"PV": 1,
"Data Bit": 17,
"ChA Pin": "P3_23",
"ChB Pin": "P4_15",
"Index Pin": "P4_28",
"ENC No": 2,
"Filter PER": 10,
"Filter CNT": 4
},

Only getting round to this now, What do I need to change above to get a single channel A and index working?
The spindle is 100ppr and one index.

Hi Murphy, at this time the QDC module works only in quadrature, the accumulator mode has not been developed but I think it would not be too complicated to add this feature to the module.
The reference manual explains the accumulator mode, the counting signal "A" and the signal "INDEX" which can be set to reset the QDC counter or not. I have some ideas for this development, but my time is finite hehe, if I have some time on the weekend I'll take a look at the topic, greetings.

Thanks rbobey1989

loadrt remora-eth-3.0 PRU_base_freq=500000

Yep this fixed the problem (kind of)
Initially I still had a joint following error, so I played with the PGAIN a bit further.
x=80 y=300 z=80
Strange to say when the fault went away for one axis, it went away for all of them.

As always thenks for taking the time to reply.

PS is there some way to create some sort of online database that we could all put out faults with the fixes?
That way we could look up these thing & have a reply... "here are the top 5 solutions" type of thing.

Thanks
Alex

frayja2002 wrote:

PS is there some way to create some sort of online database that we could all put out faults with the fixes?
That way we could look up these thing & have a reply... "here are the top 5 solutions" type of thing.

No, but that seems like a good idea.