[Claudiosd]

i have this problem. Can you help me?

[dave3431]

you need to home all of the axis X,Y & Z.

[Claudiosd]

thanks. Now, i have this problems. i don't know how to configure the emc2.
I just set the stepping motors, but the other I put in the unused pins

[Claudiosd]

Why set limits?

[chester88]

That message means you would exceed the software limits.
Limits are designed to stop the axis movement before it gets to end of physical travel.
There are hardware limits and software limits.
Hardware limits are what you connect to switches.
software limits are based from home location and table travel.
(I am assuming you used stepconf to make the configuration)
read this:
http://www.linuxcnc.org/docs/2.3/htm...is-Travel-Home
Soft limits, while annoying to set up in the beginning is designed to stop crashes and tells you if the program you are running has asked EMC to move an axis beyond the physical travel before it actually moves the axis.

[Claudiosd]

Thank you very much for your help.
then I would be using soft limits, and my problem is not set.
Can it be that the parameters I have to configure are these?

[chester88]

yes set the home switch location to zero as you don't have home switches.
Then with home position set at zero and table travel set to -4 and 4
you would need to move the axis to the middle of travel and home, as 0 is half way between -4 and 4.
I'm pretty sure that is how this works. I use home switches.
bottom line is you have to home in the right position for soft limits to work.

[Claudiosd]

thanks.that was the problem.
I never knew either micorpasos and set the leadscrew pitch. Can someone help me?
is obtained as the leadscrew pitch and microsteps?.
to calculate the leadscrew pitch 1/tpi use. this is right?

[pminmo]

thanks.that was the problem.
I never knew either micorpasos and set the leadscrew pitch. Can someone help me?
is obtained as the leadscrew pitch and microsteps?.
to calculate the leadscrew pitch 1/tpi use. this is right?

Are you using stepconf to setup your needs? It asks pitch and microstepping seperately.

[Claudiosd]

Are you using stepconf to setup your needs? It asks pitch and microstepping seperately.

yes, i'm using stepconf.

relationship between motor and leadscrew is (1:1).

I think the pitch is calculated:
p = 1/tpi
and this value must be re-divide it by one to calculate rev / inch:
rev / inch = 1 / p

This is true, or wrong?

microsteps not know anything about me and I needed to explain a little about this.

[pminmo]

yes, i'm using stepconf.

relationship between motor and leadscrew is (1:1).

I think the pitch is calculated:
p = 1/tpi
and this value must be re-divide it by one to calculate rev / inch:
rev / inch = 1 / p

This is true, or wrong?

p=1/tpi.....IF it is a single start screw.

[Claudiosd]

I'm using single start screw.I use two formulas to explain the above?.
or just p = 1/tpi?

[Lexx0001]

Yes, the pitch = 1/Threads Per Iinch, but the pitch isn't the same as steps per inch.

You will need to know how many steps the motor needs to make one revolution. You've mentioned micro-stepping. You will need to know how many micro steps per revolution. I have a small mill that I can use as an example.

I the lead screw I have has 20 TPI. The motor takes 200 steps per revolution. The Gecko controller I use has 10 micro-steps per step.

So, the number of steps per inch = 10 (micro-steps) X 200 (steps per revolution) X 20 (threads) = 40,000. If you use metric, the formula is the same except for threads per inch, it would be threads per unit of measure.

I hope this helps

Regards,

Bill K.