knight_toolworks
04-05-2009, 03:29 PM
This is on a prt alpha a little over 2 years old.
I posted last month about some problems I had with connection issues. Removing the USB hub helped but the problems are there but not as bad.
Since I changed the hub and rewired the dc grounding wire the problems don’t happen as often.
I tested two older dell computers both run around 73 on the USB test. I only tested them before I discovered the hub problem. But at the time both computers running the same almost newest (one version below the newest right now) the problems were the same.
The problems now are once in awhile loosing the machine connection. This happens pretty much only when I use the keyboard to move manually or type in a jog command. Two different connection issues one that causes the software to crash and close down. That one I just start the software again re zero and off I go. The second causes the software to crash and I need to use CAD to close the software down and I have to turn off the machine and start it again.
I have had the first problem through three different computers one that was far faster then the others.
Sometimes when I use a jog command the machine moves about the speed of a move command then it looses connection and the machine needs to be turned off.
Since I redid the dc ground I have not have had a problem when running a toolpath file.
Well I have but not the extreme ones above.
The problems I have had running files and some seem to do it worse then others are these. The problem is I get the machine dialed in so the cuts are right on then I run the file a few times and the cut can be off a bit in the x (never checked the y as it was not as critical. This problem was far worse when I had the USB hub hooked up. The cuts were very light and I don’t think it was a hardware issue.
Like a few holes would end up as slight ovals. I was cutting some mdf Friday and the parts were .03 undersize in the y and a little less in the x.
Most of the stuff I make this is not critical and in this case the parts looked fine but I thought I would check them. I tried another bit and it was the same a slower cut speed the same.
Right now the machine has the dc grounded with a wire through the hose to the 6” hose it has a built in wire so I soldered the ground wire to it. Then at the other end where it connect to my main dc I soldered another copper wire and ran that to the black pipe used for the sprinkler system and then to one of the electrical junction boxes. The machine I ran a wire from the rail to the control box and the control box to the power strip my computer is on. I never noticed any difference from that setup.
I am pretty well out of idea’s to try now. But I need to solve this issue.
I posted last month about some problems I had with connection issues. Removing the USB hub helped but the problems are there but not as bad.
Since I changed the hub and rewired the dc grounding wire the problems don’t happen as often.
I tested two older dell computers both run around 73 on the USB test. I only tested them before I discovered the hub problem. But at the time both computers running the same almost newest (one version below the newest right now) the problems were the same.
The problems now are once in awhile loosing the machine connection. This happens pretty much only when I use the keyboard to move manually or type in a jog command. Two different connection issues one that causes the software to crash and close down. That one I just start the software again re zero and off I go. The second causes the software to crash and I need to use CAD to close the software down and I have to turn off the machine and start it again.
I have had the first problem through three different computers one that was far faster then the others.
Sometimes when I use a jog command the machine moves about the speed of a move command then it looses connection and the machine needs to be turned off.
Since I redid the dc ground I have not have had a problem when running a toolpath file.
Well I have but not the extreme ones above.
The problems I have had running files and some seem to do it worse then others are these. The problem is I get the machine dialed in so the cuts are right on then I run the file a few times and the cut can be off a bit in the x (never checked the y as it was not as critical. This problem was far worse when I had the USB hub hooked up. The cuts were very light and I don’t think it was a hardware issue.
Like a few holes would end up as slight ovals. I was cutting some mdf Friday and the parts were .03 undersize in the y and a little less in the x.
Most of the stuff I make this is not critical and in this case the parts looked fine but I thought I would check them. I tried another bit and it was the same a slower cut speed the same.
Right now the machine has the dc grounded with a wire through the hose to the 6” hose it has a built in wire so I soldered the ground wire to it. Then at the other end where it connect to my main dc I soldered another copper wire and ran that to the black pipe used for the sprinkler system and then to one of the electrical junction boxes. The machine I ran a wire from the rail to the control box and the control box to the power strip my computer is on. I never noticed any difference from that setup.
I am pretty well out of idea’s to try now. But I need to solve this issue.