Different steppers on each axis?

[NC Cams]

This thread was pretty much DEAD after post #4

But amazingly enough and in spite of the criticism offered of my post #5 in post #6, a LOT MORE usefull information was offered to the original poster as a result of some contrarian comments that were made.

It is too bad that an interloper had to stimulate the contributions that came about from post 6 on. In any case, it looks like I achieved the intended results of my initial post.

Whereas the member could have gone off fat dumb and happy after post #4, he at least now has more knowledge to do a better job of building and tuning his system.

Thanks, guys, for contributing the extra info....

[pulsar200]

I agree with "NC Cams". This thread obviously needed a kick in the but. The problem is more complicated than: It works or i doesn't work..

Regards
Martin

[ger21]

Originally Posted by dertsap i'd suggest using the strongest motor for the x axis and the weaker slower for the z axis , z doesn t travel as far and not as demanding as x y

From all the messages I've read on the Mach support group, many people underestimate the power required for the Z-axis. Whenver someone posts about losing steps with Mach3, it's almost always the Z-axis, and when it is the Z, it's usually due to it being underpowered. Rapidly lifting the spindle can take more power than moving it back and forth.

[ger21]

Originally Posted by pulsar200 . The problem is more complicated than: It works or i doen't work..

Not according to all the people who said it will work. Which seems to be all but one. You asked a simple question: Will it work? And you got the answer. Apparently though, you had more questions, but didn't ask them. That's why the thread died. If you have questions, ask them. There are plenty of people here willing to answer.

You set up the max accel and speeds for each motor in the control software, usually through trial and error. And allow about a 20% safety margin. The control software will not exceed these numbers. And when making multiple axis moves, the controller will limit your speed to the slowest motor you're using.

You can change your speeds for different materials in the g-code, but your acceleration will always be the same. So make sure you set it for worst case scenario.

Edit:

Can anyone see the smileys in this post? There should be 2, but they're not showing up for me.

[pulsar200]

Thank you very much for all your answers.. And your right. I did have more questions. But I only found out what they where during the discussion of "NC Cams" post.

Best Regards
Martin H. Pedersen

[dertsap]

Originally Posted by ger21 From all the messages I've read on the Mach support group, many people underestimate the power required for the Z-axis. Whenver someone posts about losing steps with Mach3, it's almost always the Z-axis, and when it is the Z, it's usually due to it being underpowered. Rapidly lifting the spindle can take more power than moving it back and forth.

i kind of look at it in the way of z having less travel and less use so it can handle running slower , though i can agree with you , i think that if a motor can t work properly at a slow speed for the z axis ,the motor should be turfed

[ger21]

I think the problem, though, is that nobody wants to run it slower, and assumes they can get by with less power and not have to go slower.

[dertsap]

Originally Posted by ger21 I think the problem, though, is that nobody wants to run it slower, and assumes they can get by with less power and not have to go slower.

nature of the beast

[spalm]

Gerry has a point in the Z axis being its own little boondoggle. That is why I ended up using a higher tpi on my Z. It’s slower, but it is stronger. I didn’t need as much speed here.

Steve