Re: Stepster

Ernst,
It's one "Unit". When you enter the change per step in Setport, it's
based on those units. Lets say, for instance, you stepper motor moves the
table .001 inch per step, so you enter .001. When you tell the table to
move 1.oo, it pulses the motor 1000 times. If you entered .0254 for the
offset, and you enter 1, it'll pulse the motor 39 times and move the table
just below 1mm (and there will be an error of .37 pulses = .0094mm). It's
all based on UNITS. If you spec all your distances in mm, it's mm, all
inches, it's inches. All furlongs, it's furlongs. No problem

The big question is, is 4 places to the right of the decimal point (radix
mark) enough. The big problem is, the more places I end up going to the
right, the smaller the max travel of the table is, and the slower the
software is.

Kevin wrote the software using floating point math. The problem with this
is you get rounding errors, and it's SLOW. If I limit everything to .0001
units (OK, so we might have a problem with wire EDM and surface grinders,
but I can re write for that later), I can speed up the program. I could,
without TOO much problem go to .00001, BUT it would require all current
users to redo their config files (which stores everyting in .0001 units -
aka, if you tell it that one step is .001 inches, it stores it as 10, but
it CAN do 10.2)

Charlie

At 01:47 PM 10/13/99 +0200, you wrote:

>From: Ernst Aardal <ernst@...>
>
>I hope you also will think about us metric people ower here.
>In the jog menu you are using 1 inch if I am using 1 as jog distance
>that is 1mm or 0.03937 inch??
>Ernst
>
>Charles Gallo wrote:
>
>> From: Charles Gallo <Charlie@...>
>>
>> Hi Folks,
>> After taking most of the summer off, I've been working again

(and in fact

>> Dave has an Alpha test version right now)
>>
>> One question for you. Right now, things like the step sizes and backlash
>> numbers that you enter in setport can be ANY number of decimal places. In
>> other words, if you really want to spec something to .000001 of an inch,
>> you can. I think it would be reasonable to limit the resolution on these
>> to 1/10,000 of an inch.
>>
>> Any objections? Anyone have any good reason not to do this?
>>
>> Charlie
>>
>> PGP Key Avalible upon request
>> RKBA!
>>
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>>Welcome to CAD_CAM_EDM_DRO@...,an unmoderated list for the

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RKBA!