Doubt about shutdown pc and mach3

[Lc1975]

This is what i have in motor tunning:

Step per unit X: 157.5947368
Step per unit Y: The same above
Step per unit Z: 157

Velocity in mm's in all axis: 600
Acceleration in mm's in all: 70
G's: 0.0071383

[foobillious]

You can sanity check those numbers if you know what your leadscrew pitch is, and how many steps per revolution your motors are.

calculation is as follows

Steps per unit = steps per revolution / leadscrew pitch

[Bob Willson]

Try changing the velocity to about 4000 and the acceleration to about 300.
Give that a go and let us know how you do.

[Lc1975]

Thanks

I will give a try later..

Damn work dosen't let me go on this month...

Only at night i am in house and on that hours is complicated because of neighbors...

[Lc1975]

Try the numbers you give me..

Working is ok. A bit hard when stops or start but works...
The only problem is when i use the keyboard to left or right the motors after maybe 2cm stops and then i have to repeat in the keyboard..
I think that is too much...
I used half of the values...
2000/150
Works fine until now even with keyboard...

Thanks for the tip

[Bob Willson]

You shouldn't be getting any run on at all, nor should it only move a small distance before requiring a second keyboard press. So, try setting it to ' exact stop' to remove any run on and make sure that you have the program set for continuous jogging.

[Lc1975]

You shouldn't be getting any run on at all, nor should it only move a small distance before requiring a second keyboard press. So, try setting it to ' exact stop' to remove any run on and make sure that you have the program set for continuous jogging.

Sorry Bob but my translation and understanding is not that good...

When put that values the motors should not move with the keyboard??
Is that what correct?
Or i understand wrong?
The Program is to "continous run"

Sorry about this

[Bob Willson]

Hi LC1975

I think I may have misunderstood what you were trying to say.

If you were getting good results from a speed of 2000mm a min and acceleration of 150 then OK. But, that is quite a slow speed for what appears to be proper ballscrews on your machine. If you are getting too much noise or vibration at 4000 * 300 they also try at 3000 velocity by 200 acceleration. If the velocity seems to be OK at this speed then try upping the acceleration in increments of 25 until faults occur, then back off 100.

Just doing this should drop your cutting times if you are cutting at full speed (G0 F3000). (NB. I am not advising you run at this speed, just showing the code example)

[Lc1975]

[lang=pt]Hi.
Vibration it dosen't make none..
Noise maybe a little it's the first time that i use this type of motors.. and for what i'm accustomed with low speeds in the moment is a bit louders, worms up a little (just a little bit) after a while, normal?
The rest i really like see the machine working..

Very fast compared to other works...
I will try more configurations to see if i get a good work and stability of the motors...
Maybe i have to change the configurations of the DQ542MA..
i have to see that better...
Thanks for the help from all..
A bigger thanks for Bob Willson

But on this momenty my real problem i think that it's solved...
I now if i stop a work in "FEEDHOLD" of Mach3, i then right down the offsets (just to compare) and the line of the file in the moment, then i home the machine, shutdown the pc and machine, in the next day i just insert the line and start from there and in the software Mach3 appears a little box to me to confirm if is the correct coordinates to start the spindle in that location of the work piece, i press ok and the machine starts to work from the last point that i stop..


This was a person from cnczone that tell me to try this.. nickname ger21.
And it works.

Regards[/lang]

[Bob Willson]

If Ger21 said it, then it is so. He is VERY good at these things, So if I say one thing and Ger says different, then go with what Ger said.

It is normal for stepper motors to get quite hot - maybe even very hot - but should be no more than about 70^oC.

[epineh]

Yes stepper motors get very hot, I found this out on my 3d printer with a plastic printed extruder, the motor got so hot it melted the extruder assembly and the 3d printed gears...another reason I like servos

Russell

[foobillious]

a lot of controllers include a low power idle function for the stepper motors. This can help to reduce heat build up. It certainly does with my machine.