Missing comm

[cowboy1296]

I maybe premature with this question. But the last 3-d plaques that i did I went though hours of cutting, as many as 16 per plaque with no problems. During the cut out of both plaques i got a missing comm error. Time wise this is the shortest tool path. Any one ever experience this.

Of course i did a c-3 and i was back in the game.

[Chuck Keysor]

I have had com errors, some of which have happened near the end of some very long cuts. And the only way I knew how to get back to where I was, was to run the entire file all over again, very time wasting. (Once I had a com error, and I found some command somewhere that said resume at last line,,,,,,, something like that,,,,,,,, and it didn't work, or do what I thought, and it ruined my piece as it started cutting in the wrong place. That is why I just start all over. And I have also taken to breaking my projects into smaller parts, so if I start all over, I am not loosing hours........) Chuck

[tlempicke]

I have kind of discovered something, and it may be pure bunk, but it is working for me.
When I first start the machine I do a c5 to warm up my spindle.
Afterward the machine seems to get cranky. Nothing specific, it just does not respond quite like it should.
So after I do a C5 now I shut down SB3 and re-start it.
I haven't had a comm error in months now!

[cowboy1296]

I have a router but have considered the restart as well. The first of the two plaques i had two comm errors (at different lines) during the profile cut out. But only 1 on the second. Its just funny that i can do hours of cutting with no issues and then bamm.

[Gary Campbell]

Is there a chance that after a number of "hours" that your computer is set to shut down hard drives, USB or some other function that is crucial to CNC operation?

[cowboy1296]

I dont think so. The computer does not shut down. Just a missing comm. Now if i am missing your point tell me how to check it.

[Gary Campbell]

The majority of those settings are in the Power section of the control panel. There are numerous settings, sometimes one gets overlooked.

[srwtlc]

This one in particular can be an issue and it can get re-enabled with a Windows Update (I've seen it happen).

[cowboy1296]

thanks i will double check everything.

[Chuck Keysor]

I'm with Cowboy, "Its just funny that i can do hours of cutting with no issues and then bamm." is my experience as well. I know early on someone suggested I needed to check my sleep mode settings, and I was not set to shut down. But to make sure I hadn't missed anything, I left my computer on for a couple of days, and it never turned off, or tried to do any updates. It just sat there........

It has been suggested to me a couple of times, once very recently, that I should try installing a powered hub between my Bot and PC. I have never done that as that just seemed too improbable. But I have made every grounding change anyone has recommended.

The one thing I have meant to do, and not gotten around to, is to replace the PC that runs my Bot. I am still using the XP machine that came with my Bot when I bought it.

So I have watched with interest for the dedicated control computer that Shopbot may be bringing out that would as I understood/recall, would eliminate the continual data exchange/handshaking between the PC and the Bot. Maybe that was just a dream that I had..........

Chuck