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Sudden shift during pocketing

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(@terlouw)
Beiträge: 1
New Member
Themenstarter
 

Today I (beginner) was pocketing wood with a 6mm ball mill with a Stepcraft D600 and an AMB 1050. As shown in the attached image, the center position suddenly changed with about 8mm in the x-axis. There did not seem to be any obstruction or other mechanical problem. A while ago, a sudden change in the Z-axis position also occurred (fortunately going up). I calculated my feed rate using the Stepcraft instruction, using a RPM of 18.000 and a feed rate of 3420. I'm using Fusion 360 for making the G-codes (and the simulation was OK), using WINPC-NC USB as software.

Does anybody know what the most likely problems are?

 
Veröffentlicht : 10/05/2020 6:46 pm
(@kwarts)
Beiträge: 7
Active Member
 

Hi,

I was having the same experiences. I somewhere read that you have to use a USB cable with a ferrite coil at the beginning and the end. After I bought this cable the problem was gone. Also make sure the ground cable is connect!

 
Veröffentlicht : 24/08/2022 5:52 pm
(@cncmiller)
Beiträge: 230
Reputable Member
 

Hi,

Most problems in sudden changes or strange behaviour of your machine are communication related (unless you have a corrupted G-code).
Or the USB connection is not stable enough or your computer is preforming other tasks during the milling process.
Another issue can be a time out on the USB port (power safe) of your computer.
Grounding of your machine can help, I don't have that on my machine and have never any problems.

SC 1/420 + Gantry extension, Kress 1050 FME-P, NeJe 20W Laser, WinPC-NC USB v4.00, Vectric Aspire 9, SolidWorks 2021

 
Veröffentlicht : 26/08/2022 12:16 pm
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