Machsupport Forum

Mach Discussion => Mach3 under Vista => Topic started by: GHiggs on February 24, 2020, 02:59:17 PM

Title: Tool speed set higher then the motor running speed? Missing steps
Post by: GHiggs on February 24, 2020, 02:59:17 PM

Hi there,
I’m running a desktop windows 7 32. Bit. Multi core processor, stand-alone video card and printer express port card With a LPT port breakout board.
If wondering if I tell my tool to run at 2000 mm/min and in my ports and pins under motor tuning I have the motors speed set to 1998 mm/ minute will this cause miss-Steps every once and a while?
I use Fusion360 to design and make the tool paths gcode. I bumped up my cutting speed from 1900 to 2000 recently. Im missing steps as much as a deviation in one shot of 10mm
Right when my tool path changes from a 3D Adaptive clearing to a 3D ramping tool path.


 

Thanks
Glen

Title: Re: Tool speed set higher then the motor running speed? Missing steps
Post by: joeaverage on February 24, 2020, 04:47:19 PM

Hi,
no, Mach's parallel port will run up to a maximum of 1998mm/min even if the Gcode or MDI calls for faster.

Craig

Title: Re: Tool speed set higher then the motor running speed? Missing steps
Post by: GHiggs on February 24, 2020, 08:13:33 PM

Quote from: joeaverage on February 24, 2020, 04:47:19 PM

Hi,
no, Mach's parallel port will run up to a maximum of 1998mm/min even if the Gcode or MDI calls for faster.

Craig

I was not aware of the printer port having a say in the tools feed rate max?
At a frequency of 25 kHz I would have thought you could tune the motor up to 2400 mm/ min

Title: Re: Tool speed set higher then the motor running speed? Missing steps
Post by: joeaverage on February 24, 2020, 08:38:21 PM

Hi,
 maybe I'm misunderstanding you....are you talking an axis or a spindle?

Axes move at so many mm/min but spindles at so many rpm.

If you have tuned an axis motor to a max of 1998mm/min and your Gcode calls for a G0 of 2500mm/min the axis will travel
at is 'tuned max' namely 1988mm/min

Craig

Title: Re: Tool speed set higher then the motor running speed? Missing steps
Post by: GHiggs on February 24, 2020, 10:11:35 PM

Feed rate of my axis mm/min for X,Y,Z motor tuning settings
Thanks for the info.


Glen