Machsupport Forum
Mach Discussion => General Mach Discussion => Topic started by: josh on February 14, 2009, 08:56:07 PM
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hello again been gone for a while
and know I am back at this again.
just got finnishing hooking up my 4th axis rotary , but i have a proble i dont know how to use it .
i got this little plastic cylinder 2 inches round and i would like to do some holes about 8 all around can someone tell me how i
can do it. all i really want to do is see if it works, or if somebody has any programs i can run can you please post anything.
forgot to mention my biggest diameter i can turn is just 3 inches.
thanks
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Normally you set the 4th axis up as the A axis, then for simple rotation you would just command an A movement such a G1 A20 F100
Hood
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Here are some interesting links.
http://www.vectric.com/forum/viewtopic.php?f=2&t=2920&hilit=4th+axis
http://www.wizardsbyrich.embarqspace.com/
http://www.machsupport.com/forum/index.php/topic,5281.0.html
VcarvePro is the design software I'm using along with Mach3
There are other interesting 4th axis threads on this forum.
I'm in the process of getting my 4th axis
setup. I'm building the motor mount now. Hopefully I will get to do some
testing in a couple of weeks.
Keep us posted on your progress.
olf20
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Normally you set the 4th axis up as the A axis, then for simple rotation you would just command an A movement such a G1 A20 F100
Hood
once it set up I manage to get the motor running but know I have a problem the motor one turns in one direction and when I check the active low or high it will only spin in the other diretion has any one had this prblem before if can can you please tell me how to fix because I dont even know where to start.
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It depends on the way you have it configured, cant remember exactly off the top of my head but I think if you have it as a rotational axis and have rollover enabled you move one way with a positive number and the other with a negative.
Hood
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It depends on the way you have it configured, cant remember exactly off the top of my head but I think if you have it as a rotational axis and have rollover enabled you move one way with a positive number and the other with a negative.
Hood
thanks hood for helping
but how do I have to set up or where do I set it so it can move both ways.
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settings are in General config page, as I said I cant remember as I have only messed with it a few times.
Hood
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FINNALY
i figure out the problem there was a problem with my wiring my driver was not wired up correctllly.
know the A axis moves in both direction.
thank you fellows
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Hi, Josh
Hears a little bit of A axis G-code for 8 holes .250 deep, Also has a couple examples of Gear teeth cutting.
It uses some INC G-code and Subroutine Call's, Setting's page, Set A rot. dia. to 2 inch's and zero axes above part.
Have some fun, Chip
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thanks chip I will keep attepting this 4th axis thing
but I also knowtice on the second picture you checked the (use diameter for feedrate) does that always have to be check when using 4th axis rotary.
and on the 3rd picture you checked rotate 360 rollover does that also always have to be check .
I really dont now what both of those mean If you have some time can yo please explain to me what those 2 boxes are all about.
thanks you.
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Hi, Josh
The use diameter for feedrate uses the, Setting's page, Set A rot. Dia. "value" to calculate the F speed in relationship to the part Diameter.
360 rollover, When the A axis hit's 360 it reverts to 0 deg. value, With out it checked axis will continue to count up and if you issue a A0 the axis will reverse direction.
Play with these settings and G-code to see how thay respond.
Chip
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chip
let me try this question 1st (The use diameter for feedrate uses the, Setting's page, Set A rot. Dia. "value" to calculate the F speed in relationship to the part Diameter.)
so let say I have a stock of 2 inches and I am doing some milling around this stock does that mean on the settings page go to rotation diameter, I would input 2 inches.
does that sound correct.
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Hi, Josh
Yes, The feed rate will be based on the stock diameter, As your finding, A axis setting will need to be changed depending on the job setup.
Chip