CNC BRIDGE SAW FOR MARBLE
16 Jan 2018 19:37 #104561
by Yannis
CNC BRIDGE SAW FOR MARBLE was created by Yannis
Hi to the forum
i m thinking to convert my old bridge saw to cnc with linux(dual gantry with 5 axis)
i will use Chinese servo motor and drivers (because of the low price)
1kw 1000rpm 10NM with planetary gearbox
so the first question is how to drive them or what type mesa card to use?
i m very pleased with the 5i25-7i77 that i used in the intermac dual gantry
the Chinese servos can be driven with position command or analog(+- 10volt)
also i need to move in manual mode the machine like this
first i have to rotate the c axis of the machine in the desired angle
then with a button or a joystick i have to move the x and thy axis together with the same speed until
the hit the limit and reversed
here is a link with a youtube video
and another
any sugestions?
thanks
Yannis
i m thinking to convert my old bridge saw to cnc with linux(dual gantry with 5 axis)
i will use Chinese servo motor and drivers (because of the low price)
1kw 1000rpm 10NM with planetary gearbox
so the first question is how to drive them or what type mesa card to use?
i m very pleased with the 5i25-7i77 that i used in the intermac dual gantry
the Chinese servos can be driven with position command or analog(+- 10volt)
also i need to move in manual mode the machine like this
first i have to rotate the c axis of the machine in the desired angle
then with a button or a joystick i have to move the x and thy axis together with the same speed until
the hit the limit and reversed
here is a link with a youtube video
and another
any sugestions?
thanks
Yannis
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16 Jan 2018 19:59 #104566
by Todd Zuercher
Replied by Todd Zuercher on topic CNC BRIDGE SAW FOR MARBLE
Does not sound too difficult. The configuration would be similar to one for a tangential knife, and I know I've seen configs posted for some of those.
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16 Jan 2018 21:06 #104573
by Yannis
Replied by Yannis on topic CNC BRIDGE SAW FOR MARBLE
The configuration would be similar to one for a tangential knife
where can i find that?
here in the forum ?
where can i find that?
here in the forum ?
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21 Jan 2018 18:49 #104808
by Yannis
Replied by Yannis on topic CNC BRIDGE SAW FOR MARBLE
Hi again
there is little info for this configuration
in this video in 1.00 is the manual move i m try to achieve
any suggestions?
thanks
Yannis
there is little info for this configuration
in this video in 1.00 is the manual move i m try to achieve
any suggestions?
thanks
Yannis
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18 Feb 2018 10:47 #106121
by andypugh
Replied by andypugh on topic CNC BRIDGE SAW FOR MARBLE
The easiest way to do tangential-knife work is to use a G-code generator that controls the angle.
(Gcodetools for Inkscape can do this, as can many other packages)
It is possible to determine the correct angle for the saw on-the-fly but it is not likely to work very well for something that can not rotate when the tool is in the cut.
(Gcodetools for Inkscape can do this, as can many other packages)
It is possible to determine the correct angle for the saw on-the-fly but it is not likely to work very well for something that can not rotate when the tool is in the cut.
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18 Feb 2018 19:35 #106146
by Yannis
Replied by Yannis on topic CNC BRIDGE SAW FOR MARBLE
Hi
the manual move i try to achieve here is when rotate the c axis in a certain angle to execute a move by moving the x and y with the same speed simultaneously.So i think that i have to express that move in relation to the c axis angle. Then i have to
associate that with a Hal pin with + or - to move forward or in the opposite direction
(when i use the cam program to cut with disc the program calculate automatic the move)
the manual move i try to achieve here is when rotate the c axis in a certain angle to execute a move by moving the x and y with the same speed simultaneously.So i think that i have to express that move in relation to the c axis angle. Then i have to
associate that with a Hal pin with + or - to move forward or in the opposite direction
(when i use the cam program to cut with disc the program calculate automatic the move)
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18 Feb 2018 22:32 #106157
by andypugh
Replied by andypugh on topic CNC BRIDGE SAW FOR MARBLE
For manual cuts there is the option of using polar coordinates.
linuxcnc.org/docs/html/gcode/overview.html#_polar_coordinates
So, if you wanted to make a straight cut at 30 degrees you could jog the saw to the starting position then touch-off the X and Y to zero.
Then set the saw to 30 degrees: G0 C30
Lower the saw: G1 F100 Z-10
Then a straight cut for 1000mm: G1 F100 @1000 ^30
(I am not sure if that answers the question you re asking)
linuxcnc.org/docs/html/gcode/overview.html#_polar_coordinates
So, if you wanted to make a straight cut at 30 degrees you could jog the saw to the starting position then touch-off the X and Y to zero.
Then set the saw to 30 degrees: G0 C30
Lower the saw: G1 F100 Z-10
Then a straight cut for 1000mm: G1 F100 @1000 ^30
(I am not sure if that answers the question you re asking)
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19 Feb 2018 17:12 #106173
by Yannis
Replied by Yannis on topic CNC BRIDGE SAW FOR MARBLE
Yes that is what i try to achieve
but it will be faster if the second part of the move (Lower the saw: G1 F100 Z-10) and the third one (Then a straight cut for 1000mm: G1 F100 @1000 ^300)
is done by joystick
The rotation of the head is done manually to alignment with some line in the material with some laser pointer
1)the move G1 F100 Z-10 is always the same
2)the move of the straight line (Then a straight cut for 1000mm: G1 F100 @1000 ^30) so if there is a way to express that with an equation and always take as C the value of the the C at display
3)in the end of the cut a move G0 Z50 is always the same
4)add one more command that stop any move
so the question is can i execute this 4 moves (commands) by button??
if yes what is the procedure??
thanks
but it will be faster if the second part of the move (Lower the saw: G1 F100 Z-10) and the third one (Then a straight cut for 1000mm: G1 F100 @1000 ^300)
is done by joystick
The rotation of the head is done manually to alignment with some line in the material with some laser pointer
1)the move G1 F100 Z-10 is always the same
2)the move of the straight line (Then a straight cut for 1000mm: G1 F100 @1000 ^30) so if there is a way to express that with an equation and always take as C the value of the the C at display
3)in the end of the cut a move G0 Z50 is always the same
4)add one more command that stop any move
so the question is can i execute this 4 moves (commands) by button??
if yes what is the procedure??
thanks
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20 Feb 2018 07:57 #106219
by andypugh
Yes, I think so.
G-code knows the C-angle, for example. Once you are lined-up then the G-code for the cut becomes
G1 F100 @1000 ^#<_c>
Which I confess does look like a random string of "spare" characters from the keyboard.
linuxcnc.org/docs/2.7/html/gcode/overvie...ned-named-parameters
You can execute a g-code line from a button push in a couple of ways, using MDI_COMMAND or MDI-bittons in a Glade virtual panel.
Replied by andypugh on topic CNC BRIDGE SAW FOR MARBLE
so the question is can i execute this 4 moves (commands) by button??
if yes what is the procedure??
thanks
Yes, I think so.
G-code knows the C-angle, for example. Once you are lined-up then the G-code for the cut becomes
G1 F100 @1000 ^#<_c>
Which I confess does look like a random string of "spare" characters from the keyboard.
linuxcnc.org/docs/2.7/html/gcode/overvie...ned-named-parameters
You can execute a g-code line from a button push in a couple of ways, using MDI_COMMAND or MDI-bittons in a Glade virtual panel.
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20 Feb 2018 12:25 #106230
by Yannis
Replied by Yannis on topic CNC BRIDGE SAW FOR MARBLE
i follow your instructions in the mdi command
please check the photo is ti ok what you see?
please check the photo is ti ok what you see?
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