making my machine distance work accuratly

so driver microstepping is not important? if its 10 or 1?

for the motor, i do 1: 2.1 or2:1 or 1:2

so what ever number you use to get to the right axis scale will give you the right combo.
isee..

i would have never guess.


ill go to the shop and try that right away and report back.
now for the speed, and velocity, what is the ball parke for a normal stepper? i know its all different from machine to machine but just a ball park so i can try something that should work and see why my motor run so rough and eleminate from there,

now one more thing.

as for the Z axis.

is someone know what the cncrp setting are for the 5 star ACME screw?

1 rotation move 1/2''

ok bIG JOHN trick worked beautiful! so 1 in every box. the ration is 2;1

and the motor were running rough because the step had to be reverse.

perfect! thanks so much.
i would have not be able to do that on my own. now i have trouble with my Z

the screw has 10 thread per 1''. it moves 0.5'' per motor turn. how do i figure out the actual pitch?

thanks for repeating, i guess i dont understand what i am doing.

thanks for the patience.


everything move beautifuly but my distance on X and Y are off. god thisis driving me nuts.

its weird because i have the setting from the site were i bought this stuff. wonder what i am doing wrong.

the speed is good, it home nicely, still problem with soft limits, ill figure that out today but i wonder why my distance are off. i set it up in inches, ill convert later, when i have 1273.2 step per inches the distance should be fine.

if iwant to double the distance i double that number?

do you have 3.2:1 gearing or 2:1?
Those are the 2 options if you are using the nema 34 driver from cncrouterparts.com
There are other options if you are using nema 23 will be 3:1 or 2.73:1.
So you need to be sure what you are using.
I Think you said earlier you had the nema34 PRO stuff.
that should be the 3.2:1 gearing which would be 2037.18 as your scale.
If you have 2:1 gearing you should use 1273.4 as your scale.

For Z axis, scale should be 4000 w/ a 1/2-10 5start screw w/ 10x microstepping

i am using the 2;1 not pro. nema34 all around even on Z.

i was aking at the beginning for another machine. now i am setting up my own machine and i am having hell of a time. i gues its real setting, no xml file already done for me and i never done it so i am a bit lost. i also never played with linuxcnc so its all much to chew on.

new question if someone can help. i search the forum but cant quite see what i need.
i am trying to set my limit
the machine has switches (both limit and home in one on each axis)
id like to have the machine home in left back corner Z all the way up.

here is the dimension of the machine. Y 29'' X 120'' Z 10''

i would like Z to be at zero when its all the way up and going down in negative.
the x and z moving in positive.

everything that i am doing doesnt work.
can i set the minimum at 0 or its has to be inside of zero? is the limit switch is 0 and the soft limit 0.01 ?