Re: 400 steps / revolution steppermotors higher speeds than 1000 steps per second

[StefanL38]

OK so I have done some more tests.

As long as I run the motors over the manual function I can increase speed up to 10000 steps per second.

the Inkscape-plugin limits the speed to this value. So as the number of steps is limited to 3200 steps through 

the inkscape-plugin.

in plotting a drawing thinkgs work as expected up to a speed of 1000 steps/sec.

As soon as I go over this limit even at 1001 steps/sec The motors are driven at a much higher speed.

I estimate 5000-10000 steps per second. It is the same thing for speed pen up and pen down.

Whenever one or both of the speeds are over 1000 steps/sec the motors run at a much higer speed when I try

to plot a drawing.

So does this mean that the InkScape-plugin has a bug that it calculates the wrong speed?

EDIT:

I took a look into the python sourcecode

I guess these lines cause the problem

self.nTime = int( round( 1000.0 / self.fSpeed * distance( self.nDeltaX, self.nDeltaY ) ) )

strOutput = ‘,’.join( ) + ‘r’

self.doCommand( strOutput )

nTime = int( math.ceil( 1000 / self.fSpeed * distance( self.nDeltaX, self.nDeltaY ) ) )

I did’nt analysed the code in detail but I guess because these calculations are based on “1000” 

that values above 1000 are causing the problem.

best regards  

Stefan