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Hello Art and others
I have had this problem for a long time (I thought it was my machine)
but I have just set up an other machine. The problem that I am having
is when I try to run the A axis (cutting text on a cyl.) the stepper
is stalling out when a direction change is made. The axis moves GREAT
with jogging. as a test I lowered the max speed and gave it a long
accel. this also did not work.

Thank you
Brian

I have the same problem. Have tried every rotational diameter that I
can imagine.

--- In mach1mach2cnc@..., "barker806" <brian_barker@u...>
wrote:

Hello Art and others
I have had this problem for a long time (I thought it was my

machine)

but I have just set up an other machine. The problem that I am

having

is when I try to run the A axis (cutting text on a cyl.) the

stepper

is stalling out when a direction change is made. The axis moves

GREAT

with jogging. as a test I lowered the max speed and gave it a long
accel. this also did not work.

Thank you
Brian

Brian:

I thikn that version 4 is what you need. In version 4.0 in the logic
config there is a checkbox to turn on the angualr decrimination. This when
set to 91 degree's will force the angualr change to be done in exact stop
and most aother moves to be done in CV. This shoudl solve the trouble. The
angualr number of 91 is put in the corrections tab under Blend Factor..

Thanks,
Art
www.artofcnc.ca

--- In mach1mach2cnc@..., Art <fenerty@a...> wrote:

Brian:

I thikn that version 4 is what you need. In version 4.0 in the

logic

config there is a checkbox to turn on the angualr decrimination.

This when

set to 91 degree's will force the angualr change to be done in

exact stop

and most aother moves to be done in CV. This shoudl solve the

trouble. The

angualr number of 91 is put in the corrections tab under Blend

Factor..

Thanks,
Art
www.artofcnc.ca

Art I fear this is not the case I have tested in EXACT stop and In CV
modes. the problem is that you are missing an accel. some where?? I
set the Accel. VERY low and it is not putting the motor throught the
accel curve every time. When I start the porgram it will move with
out the curve (it uses one from I don't know where) that I had set
then it goes in to a other move and uses the accel ??? I don't get
it at all... I am going to test the other axis and see if I get the
same problem.

I tested the B axis and I have the sam problem... I think I see what
is going on. The Rot. axis work GREAT if it is the only axis moving
but in a multi axis move I am having trouble. the acceleration of the
A xis is not setting the rate of accel. I hope this sheds some light.

Thank you
Brian

Brian:

Can you give me a snippet as a test. For example I just did the following
test.

G0X100A10
G0X0A0

I set the X accel at max, the A at very slow accel.

When I start it , it slowly accelerates then decelerates to an X of 100, A
of 10, the it accelerates and decelerates ending at zero.
Does yours pass this test as well??

Art
www.artofcnc.ca

--- In mach1mach2cnc@..., Art <fenerty@a...> wrote:

Brian:

Can you give me a snippet as a test. For example I just did the

following

test.

G0X100A10
G0X0A0

I set the X accel at max, the A at very slow accel.

When I start it , it slowly accelerates then decelerates to an X of

100, A

of 10, the it accelerates and decelerates ending at zero.
Does yours pass this test as well??

Art
www.artofcnc.ca

I am Home, but I will test it first thing when I get into the shop.
There may be some thing with the feed???
brian

Biran:

Could be, but one of the reasons I need to get rid of 2.0 and move to 4.0
is the vast number of fixes and repairs in version 4.0.

Version 2.0 is a very stable program, but it does have some bugs that are
long gone in 4.0.

Art
www.artofcnc.ca

Brian, i had this kind of problem with my A axis and was simply a friction
problem when i was using an opposite center.

Try to connect it to another linear output to see if the problem remain. If
yes it is certainly a mechanical problem.

Olivier.

--- In mach1mach2cnc@..., "Digital audio Pro"
<digitalaudiopro@w...> wrote:

Brian, i had this kind of problem with my A axis and was simply a

friction

problem when i was using an opposite center.

Try to connect it to another linear output to see if the problem

remain. If

yes it is certainly a mechanical problem.

Olivier.

I don't think that is the problem as I have no center set up and I
don't have a part in the chuck...

I have about 25 Deg/sec^2 accel and 25 Vel for the A axis and
12in/sec^2 and 2.0 vel for all others (XYZ).

Thank you for looking at this

here is a bit of the code:

G64
G90
G53 G00 Z-0.1
G54 X5.0 Y0.0 A0.0 (will not use the accel here)
G53 G00 Z-0.100
M6 T2
G43 H2 Z.5
X1.0031
A294.368 (Works great here)
Z0.1
G01 Z-0.02F6.5
X0.9674 A294.6099 (Will not work here)
G02 X0.9657 A296.2808 R0.5549
G01 A298.4799
A301.4043
A304.5926
G03 X1.0604 A303.3199 R0.6148
X1.079 A303.1538 R0.3565
X1.1079 A302.9499 R0.7166
X1.1867 A302.5257 R1.8256
X1.187 A305.3084 R9.989
X1.1867 A310.5955 R29.862
G02 X1.0867 A313.2256 R4.6652
X1.0021 A315.6056 R2.7252
X0.9442 A317.3958 R1.4197
X0.9147 A318.4095 R0.7772
X0.8957 A319.1345 R0.4951
X0.88 A319.8186 R0.3093
X0.8604 A320.8225 R0.4013
X0.8398 A322.1544 R0.3032
X0.8248 A323.6243 R0.2204
X0.8192 A326.0869 R0.1704
X0.8204 A326.4346 R0.1656
X0.8237 A326.9594 R0.0904
X0.8265 A327.2324 R0.0638
X0.8345 A327.6973 R0.051
X0.8404 A327.9042 R0.038
X0.8597 A328.1422 R0.0318
X0.8793 A327.8615 R0.0284
X0.8895 A327.2724 R0.037
X0.892 A326.6979 R0.0464
G01 A325.6795
A323.5825
G03 X0.8946 A322.7514 R0.0902
X0.9026 A321.8955 R0.1219
X0.9183 A320.8558 R0.1839

--- In mach1mach2cnc@..., "barker806" <brian_barker@u...>
wrote:

--- In mach1mach2cnc@..., "Digital audio Pro"
<digitalaudiopro@w...> wrote:

Brian, i had this kind of problem with my A axis and was simply a

friction

problem when i was using an opposite center.

Try to connect it to another linear output to see if the problem

remain. If

yes it is certainly a mechanical problem.

Olivier.

Olivier
I did the Sub for the Y axis and it worked GREAT!!! I also can tell
you that the other axis (ABC) do NOT go throught the Accel that is
set in the table. I tried to run the mill with the A being the Y and
I lost steps like mad and it didn't even sound like the same mill...
I had all the same setting as when I used the Y axis (I also told it
it was a liner axis).

I hope this will help you Art.
If there is any thing I can do feel free to ask.
Brian

Interesting... i've not used a lot the 4 th axis until yet so i don't have
continous 4th axis moves experience yet. I just made indexed parts.

I will check when i'll use it.

Olivier.

Brian:

I have made a change to the next release version to track the acceleration
of the rotary axis better. I hope to release soon and we'll see if that
helps..
I don't have a rotary hooked up right now, so my testing is limited on this
one. Did the test I mentioned actually work. Setting the A accele very low
and the X very high and then doing a
G0X10A360
G0X0A0

Does this accel properly??

Art
www.artofcnc.ca

--- In mach1mach2cnc@..., Art <fenerty@a...> wrote:

Brian:

I have made a change to the next release version to track the

acceleration

of the rotary axis better. I hope to release soon and we'll see if

that

helps..
I don't have a rotary hooked up right now, so my testing is limited

on this

one. Did the test I mentioned actually work. Setting the A accele

very low

and the X very high and then doing a
G0X10A360
G0X0A0

Does this accel properly??

Art
www.artofcnc.ca

The axis is not working with the moves that you gave me to do... The
Accel is VERY fast (Missing steps).

Thank you
Brian