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Author Topic: Mach3 help please / Steps jerking  (Read 1609 times)

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Mach3 help please / Steps jerking
« on: January 27, 2015, 03:05:11 AM »

 My 3 axis CNC works fine with Mach3. I had a 3 axis USB movement card and I have changed it to a standard 5 axis BOB as I thought there was a problem with the first board. But It still exists.
 If I load a large Gcode into Mach3, when I try to toggle the axis or zoom in on Mach3's graphic table display, the stepper motors slow down steps to almost individual steps. I ran a latency test on my PC, which the results were good. ( servo / max int 1011675, max jitter 15071  // Base max int 42076 // max jitter 19317 )

Any Ideas Please ?

Re: Mach3 help please / Steps jerking
« Reply #1 on: January 27, 2015, 03:41:21 PM »
Note .
 This only happens with large Gcodes loaded into Mach3

I have tried changing Kernel speeds. Maybe not enough video Ram in the PC ??

Anyone ?

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Re: Mach3 help please / Steps jerking
« Reply #2 on: January 28, 2015, 02:52:03 AM »
Not much help really but...
It sounds like your video card ram is insufficient - try disabling the toolpath display (diagnostics screen) if everything then runs fine then that should be the proof you need.

Success consists of going from failure to failure without loss of enthusiasm.  Winston Churchill.