#linuxcnc-devel | Logs for 2017-01-30

[15:03:40] <KGB-linuxcnc> 03Dewey Garrett 05dgarr/external_offsets 710c737 06linuxcnc 10(24 files in 9 dirs) external axis-offset hal pins (v16) * 14http://git.linuxcnc.org/?p=linuxcnc.git;a=commitdiff;h=710c737
[18:16:20] <andypugh> pcw_home: Is this one of those sticky-errors that was fixedd by firmware? http://www.pastebin.ca/3762123
[18:16:41] <andypugh> Or is this a real problem?
[18:17:08] <andypugh> I can imagine that 8i20 number 3 might have older firmware.
[18:40:53] <pcw_mesa> You might just update the 8I20 firmware but I dont recall any loss of communication errors (and that looks like total loss of communication)
[18:41:54] <pcw_mesa> the sticky error bug was fixed in 2.7.something (in the driver, not firmware)
[18:45:36] <pcw_mesa> There was a minor fix in host firmware (1/2 bit time digital filter on RX UART) to avoid nuisance "extra char error"s
[18:45:38] <pcw_mesa> which would trigger the sticky error bug in the driver
[18:47:23] <pcw_mesa> is it possible there's a 8I20/RS-422 Breakout power supply issue? (since it looks like you lost all comms)
[18:59:37] <andypugh> It’s always 8i20.0003 not the other one (008b) or the 7i73 or 7i84
[19:01:12] <andypugh> Now, 8i20.008b very often fails to be detected. I was thinking that wiggling the RJ45 was fixing it, but 4 different plugs later, I am now wondering if it is just a timing / race condition thing.
[19:01:48] <andypugh> So, each 8i20 has its own common problem, but they are different problems.
[19:18:49] <pcw_mesa> you might try updating the firmware, if that doesn't fix it, its more likely a hardware issue
[19:18:51] <pcw_mesa> is the 8I20 low side powered from the cable or external 12/24V?
[19:23:33] <andypugh> Cable, I think. But the 7i44 has a separate supply.
[19:24:36] <pcw_mesa> I would try 12/24V, its tough to run the 8I20 on cable 5V
[19:25:40] <pcw_mesa> (note the jumper/connection differences for this)
[19:28:43] <andypugh> OK. I an try that.
[19:30:19] <andypugh> It’s a fairly major re-wire, mind. It’s a neat little drive-box with only the connectors it needed.
[19:30:58] <andypugh> https://goo.gl/photos/TaaZg7MsJVdZouKj7
[19:32:35] <andypugh> (The “power” socket is the relay control for soft-start and discharge control)
[19:37:31] <pcw_mesa> might measure the 5V at the 8I20
[19:38:34] <pcw_mesa> also a CAT6 or CAT5E cable is better (larger wire size than normal CAT5)
[19:41:06] <Tom_L> is 5e and 6 the same gage?
[19:41:16] <skunkworks_> shielded might help?
[19:42:13] <pcw_mesa> I think 5E and 6 are the same
[19:42:22] <Tom_L> 6 just has more twist i think
[19:42:38] <pcw_mesa> (or better insulation)
[19:42:58] <pcw_mesa> lower loss insulation I mean
[19:43:26] <andypugh> I used this cable: https://www.rapidonline.com/lappkabel-2170489-unitronic-ethernet-blue-data-cable-4x2x0-12mm-od-6-3mm-49-1790
[19:44:53] <pcw_mesa> might have too much drop on the 5V
[19:44:54] <andypugh> ( I wanted oil-resistant, stranded, etc)
[21:10:10] <KGB-linuxcnc> 03Dewey Garrett 05dgarr/external_offsets 9a67985 06linuxcnc 10(24 files in 9 dirs) external axis-offset hal pins (v17,docs) * 14http://git.linuxcnc.org/?p=linuxcnc.git;a=commitdiff;h=9a67985