Re: acceleration profille (gained steps?)

--- In CAD_CAM_EDM_DRO@y..., "Dan Mauch" <dmauch@s...> wrote:

> You have the max steps per seconds is way too high. Start at 1500

not

> 15000 then adjust upward till it starts losing steps then back off

about

> 10%. Also your acceleration is way too high. Start at 1000 sps.

Also the

> start velocity is high start at 500 and increase.
> Dan

Hi Dan,

Thanks. You are always dependable. Reset the parameters to

max sps: 1500sps ( ~9ipm)
start v: 500
acceler: 1000spss

Running the engraving program with xy feedrate 5ipm, everything OK.
However, when I tried to run the same program with xy feedrate at 9ipm
the result was distorted. looks like at a "small part" of the
begginning of the program, x was "amplified" like when the intended
result was a V, it has ended up with a fat \/ extended in the x
direction - the opposite of lost steps (is there such a fault a
gained steps?

Running the program at 6ipm was OK.

Thanks

keongsan

> -----Original Message-----
> From: keongsan [mailto:keongsan@y...]
> Sent: Friday, July 26, 2002 2:02 AM
> To: CAD_CAM_EDM_DRO@y...
> Subject: [CAD_CAM_EDM_DRO] acceleration profille
>
> Hi,
>
> Having some problem with the z-axis in the cnc'ed sherline with
> Sherline stepper 1/2 winding, Camtronics 2A driver, desknc black

box,

> with the parameters set up as follows
>
>
> Acceleration=5000
> maxsps=15000
> start_vel=5000
> steps/mm=400
>
> The z-axis seem to be loosing steps very badly. The z-axis seem to
> jerk, and hardly move. I set the accel. to 500 and start vel. to

500

> and problem persist. I think it may be the parameters may not be
> suitable for this configuration.
>
> Can someone suggest a suitable parameter for this set-up or let us
> know about the parameters which is working with your system.
>
> Thanks in advance
>
> keongsan
>
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