[hamooteh]

Hi all

i have been reading and studying cnc for about 6 years now , and finally i got my system built . im working on a 5 axis cnc router. when i run my g codes mach shows all the axis moving fine on the diagnostic page. but when i run my motors i got only 3 motors spinning (the xy and z) my C B rotational axis are not moving. i have changed the pins and the other motor which was on the C and B was working ok , which means mach is not sending signals for the C and B . this is a sample copy of my g codes i set my (step per) for the rotation axis 4.4 200x8= 1600/360

%
O0012
N5 G90 G40 G80 G17
N10 M6 T1
N15 M3 S1000
N20 G0 G90 G43 Z2.
N25 X-495.711 Y-826.236 C63.38 B-90.
N30 Z-133.311
N35 G1 X-488.559 Y-822.652 F200.
N40 Z-190.
N45 X-492.685 Y-814.419
N50 Z-133.311
N55 G93 F9999.9 B0.
N60 G94 X-474.299 Y-815.505 F200.


pleas help

thanks

[rab]

can you jog the b/c axes ?
what port/pins are b/c connected to ?
what breakout board are you using ?
Rab

[hamooteh]

Rab
thanks for your replay, i was trying to jog the C/B axis and im not sure if im doing it right, i was looking for the C/b buttons on the MPG and i only found the ALT A,B and c buttons, i have pressed them but the axis is not moving even in the software diagnostics.

my breakout board is a DB25 i got from a seller on ebay called usbfly,

http://cgi.ebay.com/CNC-DB25-Breakou...item45f18708b1

for the pins i have set the C to pin 8 (s) , p 9 (D) . B axis p 16 (s) p 17 (D) . i have also tested these pins by seting x and y axis on them and they were working fine, and i set the c b on the pins were the x y was in and again no movment at all. the c b axis is moving in the software diagnostics but the motors are not

by the way , your amazing CNC toolkit is what brought me into this, as i started by reading and learning from your yahoo group.

cheers
mo

[rab]

any movement when you tune the axes in motor-tuning ?
are you using a 6-axis screen-set ? - You can download the one I use from my Yahoo group.
that seems a good price for that breakout board - how are you finding it in setup and operation ?

Rab

[15mgtar]

Hi sorry to intrude.
I like to know where I can download a 6 axis screenset.
can you post the link?

[rab]

Hi sorry to intrude.
I like to know where I can download a 6 axis screenset.
can you post the link?

I don't know if I can upload it here at cnczone, but here it is on the Yahoo forum;

http://groups.yahoo.com/group/CNC_Toolkit/files/MACH2%20%26%203%20Screens/

Rab

[hamooteh]

Rab
When i retuned my motors, all of them didn't do any movement. i have installed the 6 axis screen from your group. And again with the same results. i have run this test code;
G00 G91
X1.
Y1.
Z-.1
C10.
B10.
M30
to check the axis separately in case the breakout board is limited with three axis and still doing the same; xyz moving and c b only moving in the software axis numbers but with no motor movements.

I didn't install the motors on my machine yet to check the accuracy of the breakout board, but it seems a good one, it response quickly when i jog and its a plug an play.

cheers
mo

[ger21]

If the DRO's in Mach3 are showing movement, then Mach3 is sending signals.

[15mgtar]

Thank you rab!

[hamooteh]

Rab

Problem solved, i forgot to inter the port number for the C/b axis. thanks Rab for your support. what im trying to do now is tune my C/B axis. can you pleas tell me how do i tune them, what are the correct formulas to calculate the step per and other motor tuning parameters to convert C/B code number to exact degree movements. my c/b head which i built is made of aluminium with zero pivot offset ; centre to centre. its similar to the design you have in your cnc toolkit group, file called "simple 5 axis head". What about movement speed , can I set the C/B motors to be faster then xyz as they should have their position set prior to, or as fast as possible while cutting.

cheers
mo

[rab]

You'll need to calculate your steps per degree.
I normally tune the motors as fast as they'll go - until they just start stalling and then back off by a quarter to a third.

Rab

[mactec54]

Hi hamooteh

Post some photos of your machine, it sounds like you have put together a nice package

[hamooteh]

hi
i dont have a camera to post pictures at the moment but ill do my best to upload them.

thanks
mo