CNT Motion Series 1000 CNC Router

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I have a problem with my 'New To Me' CNT Motion router. It is 'getting lost' in X. I need some help it finding a CNC technician who can repair my machine. See attached PDF for a further explanation of the problem.

Thanks,
Joe T.

Click the link below to download the file included with this post.

CNT_Motion_Router_Problem_Explanation__7_25_2015.pdf

james mcgrew

Wincnc is a Pretty easy controller have you called Wincnc , Kelly and those may charge you but they support their software.

Yet

I do not think this is wincnc, first I would flip the file to run mirrored and make sure the loss is in the same direction. then look at all connections, as it is equally incremented it may be software, have you run varitions of other files or just this one.

Remember you are there and We cannot see what you are doing or what is happening.

is the control computer online could a tech log in and check it ? Wincnc is a doaughterboard based card autonomus of the mother board this allows for onllne access while machine is running.

also check card in cpu to make sure it is seated correctly and not slightly loose, you may want to disconnect the board and insure pci card and daughterboard are well attached to each other, pull the 37 pin cables and look for dust and bent pins. do not blow air directly into female pin holes.

is the machine stepper or servos ?

Joe T

Member

Jim,

First, this is the weirdest forum I have ever used!!! Odd way to respond and I can not figure out how to see all responses at once!!

I have spoken to Kelly many times. He has remotely logged onto my machine and checked macros, etc. He does not believe it is a WinCNC problem. But, I just sent him the PDF I posted and asked if this could be a 'scaling' problem.

I located a Wichita, KS based CNC technician this morning and chatted with him for a few minutes before he had to leave for work. He has experience on CNT Motion machines and WinCNC. He said, with the limited information I could relay to him over the phone and not seeing the PDF yet, that it seemed to him that the problem was a scaling issue. I have no idea - - -

I would much prefer a trained CNC technician check connections, etc. I am uncomfortable doing that. As a note, when I first hooked up the machine to the electrical system, it would give me a 'Limit Z+' error. I could not find the problem. I hired another CNC Technician who came and worked with Kelly to find the problem. It was a loose ribbon cable connection inside of a connector box.

I will post the Teknic information (servo/stepper, series, etc.) after I return from my shop tomorrow morning.

Thanks again for your advice.

Regards,
Joe T.

james mcgrew

Member

All good,, Tell Kelly I said Hello, He and I have worked thru many Wincnc learnings together they are some ace guys.. I absolutely understand the need for the tech, Beauty is wincnc has thousands of users and is a very stable platform,, Z+ errors are 99% of the time a software parameter setting I saw a problem like yours a long time ago turned out to be a drive type on 9 machines once we found it all went well and all of those machines are in use today.

you have a really nice machine with that tall Z I can think of a few uses for it myself !! how are you producing the code (Cam)?

View higher quality, full size image (800 X 534)

Joe T

Member

CMI,

I would like to post your message and my reply on Woodweb.

You responded:

“Call Paul at CNT we have had a CNT CNC for 8 yrs only had couple issues and he fixed them in short order.
(412) 244-5770”

My reply:

Thank you. Paul Cullen at CNT Motion will not reply to my repeated emails requesting support nor will they respond to a trouble ticket I submitted. Paul was very helpful when I was considering the purchase of this machine. However, once I purchased it, he has become less helpful and has recently (March 2015) stopped all communication. I have tried to set up a support account for technical consultation via the trouble ticket I submitted several weeks ago. No reply.

Regards,
Joe T.

Joe T

Member

Chad,

I would like to post your response to my posting, and my reply seen below, on Woodweb. I know of at least one other person who is having problems similar to yours. He will benefit from your experiences.

That is SCARY!!!! Paul told me to have a separate 7’ ground for my machine. I did that (actually, my electrician did it). But, as you can see, I have a problem.

Thanks for the reply.

Regards,
Joe T.

Hi Joe,

We have a CNT 1000 also. It was purchased in 2007. We started having problems with the X axis about a year after the purchase. Just like you, it showed up at the tool change. Bent the tool rack, bent tool forks, even had to replace the cartridge in the spindle. Had guys from CNT in here a couple of times. Normally the problem was blamed on interference, so we drove an 8' grounding rod into the floor. Didn't seem to help. We then replaced the cables from the control to the machine. I thought this had solved the problem. We took the machine out of production due to a change in our manufacturing for about 2 years. Early this year, we resurrected it. Ran all new electric, and drove another grounding rod beside it. One of the first programs I ran, I noticed it was loosing the x axis again. I'm at a point that I don't know what to do. If you get anywhere with yours, I would appreciate any feedback.

Thanks

Chad

Greg Facer

Guys,

The standard for grounding, from what I know, is to ground everything to the building common ground. Anything else can cause ground loops....there is some good information out there but I don't have the links at hand. Suffice to say I would not be driving spikes for individual machines at my shop.

The bigger problem that I see with the CNT is that they have not grounded the data signal cable shielding, properly or at all (properly being all the way back to the control not on the machine side at all)

The motor cable shields are likewise cut away and not connected, but I think if the data cables were done correctly that would not be of great importance.

Hence, my plan is to totally redo the data cabling with modular ethernet cables (shielded and most important wires with the twisted pair wire to ground as well) running on the other side of the machine, keeping wires as far apart in the gantry cabinet as possible.

The other possible good solution is to re-do the data cabinet and move the drives to that cabinet, thus having closed loop motion all the way from cabinet to motors and route wires in the cabinet to minimize interference. Would need a bigger cabinet than stock. This is how the chinese machines are built and I'm sure it helps.

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