Rotary Axis

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22 Feb 2010 08:00 #1977 by WinDHooD
Rotary Axis was created by WinDHooD
Hi all,
I decided to install 4-axis to my milling machine.
Everything is working but I have a problem with A-axis motion.
When I use only A-axis, the motion is slow. When I move X or Y-axis the A-axis rotates faster.
What could be the cause? EMC2 I'm using version 2.3.3
Thanks for your help.

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22 Feb 2010 12:48 #1981 by dan_the_welder
Replied by dan_the_welder on topic Re:Rotary Axis
Hi,

If there is no linear axis move, then your speed is in Degrees per min.

Dan

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23 Feb 2010 07:20 #2013 by WinDHooD
Replied by WinDHooD on topic Re:Rotary Axis
it's not this

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23 Feb 2010 08:44 #2015 by Livemill
Replied by Livemill on topic Re:Rotary Axis
are the settings the same then x y axis

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23 Feb 2010 09:06 #2016 by WinDHooD
Replied by WinDHooD on topic Re:Rotary Axis
A-axis is stepper motor
X,Y,Z-axis Analog Outputs: +/-10V

[TRAJ]
AXES = 4
COORDINATES = X Y Z A
HOME = 0 0 0 0
LINEAR_UNITS = mm
ANGULAR_UNITS = degree
CYCLE_TIME = 0.01
DEFAULT_VELOCITY = 80
DEFAULT_ANGULAR_VELOCITY = 80
MAX_ANGULAR_VELOCITY = 100
MAX_VELOCITY = 100
DEFAULT_ACCELERATION = 1000.0
MAX_ACCELERATION = 1500.0

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05 Sep 2011 08:26 #12973 by elvistaylor
Replied by elvistaylor on topic Re:Rotary Axis
Please change your Speeding control in A-axis and X-axis or Y-axis..

CNC vertical milling machine.
X-axis travel 132";
Y-axis 7".
2HP A-axis drive.
Ajax 3-axis CNC control Linux based conversational,
M or G-codes.
Can be set up with conventional milling head or revolver sharpening attachments.
Milling Head: Central Machinery 12-speed belt drive milling head.
120-2,500 rpm. 1-1/2 HP 115/230/1.
Spindle travel 5".
Drill capacity 1-1/4";
face mill 3"; end mill 3/4".

R8 spindle taper. Note: Miller base with 8" x 29" work table included. Revolver Sharpening attachment: 4" DeWalt disc grinder (see video

www.emd-usa.com/

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05 Sep 2011 10:54 #12979 by Rick G
Replied by Rick G on topic Re:Rotary Axis
You might want to look here...

linuxcnc.org/docs/html/gcode_main.html#sub:G93,-G94:-Set

G94 is Units per Minute Mode

G95 is Units per Revolution Mode.

Three feed rate modes are recognized: units per minute, inverse time, and units per revolution. Program G94 to start the units per minute mode. Program G93 to start the inverse time mode. Program G95 to start the units per revolution mode.

In units per minute feed rate mode, an F word is interpreted to mean the controlled point should move at a certain number of inches per minute, millimeters per minute, or degrees per minute, depending upon what length units are being used and which axis or axes are moving.

In units per revolution mode, an F word is interpreted to mean the controlled point should move a certain number of inches per revolution of the spindle, depending on what length units are being used and which axis or axes are moving. G95 is not suitable for threading, for threading use G33 or G76.

In inverse time feed rate mode, an F word means the move should be completed in [one divided by the F number] minutes. For example, if the F number is 2.0, the move should be completed in half a minute.

When the inverse time feed rate mode is active, an F word must appear on every line which has a G1, G2, or G3 motion, and an F word on a line that does not have G1, G2, or G3 is ignored. Being in inverse time feed rate mode does not affect G0 (rapid traverse) motions.


Rick G

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05 Sep 2011 11:15 #12980 by Rick G

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05 Sep 2011 12:56 #12985 by andypugh
Replied by andypugh on topic Re:Rotary Axis
Don't get too carried away, ElvisTaylor just bumped a year+ old thread with some random words and a link to his company.

In fact, Unless I see a relevant post from him, written in english, without a commercial link at the bottom in the next week or so, I am going to ban him from the forum.

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06 Sep 2011 09:54 #12999 by Rick G
Replied by Rick G on topic Re:Rotary Axis
Yep old thread, but for any one who might be searching the old threads for answers.

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