Tom, I found this video while searching for some information on calculating geometric start/end points for arcs and angles. This is a GREAT video for calculating arcs. It seems like you haven't been very active lately but I really wish I could find more videos like this. I've been programming CNC 'at the machine' off and on for almost 30 years. One of the things I have always struggled with is calculating arcs to angles and/or arcs to arcs. With most of the lathes I've run, when programming a partial arc you can't use an R value and you must use I & K. This means I have to know how to calculate the start [or end] point of the arc (X & Z) as well as knowing how to calculate I & K. While there are plenty of videos on how to write a simple G-code program, there is a complete vacuum on how to calculate tangency points of arcs to angles and/or arcs to arcs (like the classic trailer hitch or an acorn nut). I hope you see this comment and some of the other recent comments as I am not the only viewer who has asked for help with this topic. Thank you, thank you, thank you for all of these videos. I like how you just jump right in and you don't 'front load' your videos with a bunch of useless, arbitrary information.
i'm sure you can use R try running the little prg just let it change to metric or if rain to inch think it will run it some times you must write 1/4 or 1/2 . you cant go over 180 R G21 G0 T0808 G97 S360 M03 G0 X24,373 Z1,953 G50 S600 G96 S550 G1 Z-.047 F0.1 G3 X.8 Z-3. R25. G1 X-2,028 Z-1,586 G0 Z50 M30
Hi Tom, great videos. Have you thought of posting one on circular interpolation for a lathe using the I and K values instead of the R value. I think this is required when there is not enough room between diameters to allow using the R value. I have never really understood how to find the start and endpoints for I and K.
Thanks, Tom! I like the examples you gave. I used the first just the other day when redrawing a vise from an old set of prints. The second example I probably wouldn't have thought of on my own but I can see using regularly now. Sincerely, Tom Z
that was interesting, I got a problem, I got a radius dataset, and I need to draw the shape that dataset represent but I only have a sequential radius points I don't know how to convert that in x y coordinated to draw the shape.
Hi Tom, can you please put up a video of how to program a multiple slots or holes using 4rt axes and mastercam 5 or newer. Thanks for the lessons very usefull
it depends which direction you want to cut, going counter clockwise G3 which means you’ll be cutting the oposite direction a clock turns (left), going Clockwise G2 same direction as a clock (right)
Hello sir, can you do a formula for the computation of radius from an angle with tool nose radius compensation, and thanks for all your videos it's been very helpful
Hello sir sir can you please tell me how the od,id,face and taper removes the starting value and end value fo X and z of the radius sir can you tell me if there is a formula
wouldn’t it be easier C Side/square - b Side/Square = square root Of a? we know C=2. we Know b=2. -.146 = 1.854 so a=2.square - 1.854 square= a square root X 2 gives you that Diameter as well Much faster, Same result
Hello Sukhadev, Thanks for the feedback. I have a course on basic cnc lathe programming on Udemy. The videos and all other documents are downloadable. Use this code to get the course free. www.udemy.com/cnc-lathe-programming-for-beginners/?couponCode=BASICCNCLATHEGCODE I'd like you to leave feedback Thanks. Tom
I'd love your video so much. It helps me a lot at work. Thanks for sharing your knowledge. You are the man.
Tom, thank you for the great examples. I love how you explain the math behind these cuts. Happy New Year!
Dear Mr. Tom. Could you please do a video clip with 'How to indicate a chuck to do T.I.R ?
Can you do a partial radius into a tapered angle?
Tom,
I found this video while searching for some information on calculating geometric start/end points for arcs and angles. This is a GREAT video for calculating arcs. It seems like you haven't been very active lately but I really wish I could find more videos like this. I've been programming CNC 'at the machine' off and on for almost 30 years. One of the things I have always struggled with is calculating arcs to angles and/or arcs to arcs. With most of the lathes I've run, when programming a partial arc you can't use an R value and you must use I & K. This means I have to know how to calculate the start [or end] point of the arc (X & Z) as well as knowing how to calculate I & K. While there are plenty of videos on how to write a simple G-code program, there is a complete vacuum on how to calculate tangency points of arcs to angles and/or arcs to arcs (like the classic trailer hitch or an acorn nut). I hope you see this comment and some of the other recent comments as I am not the only viewer who has asked for help with this topic.
Thank you, thank you, thank you for all of these videos. I like how you just jump right in and you don't 'front load' your videos with a bunch of useless, arbitrary information.
i'm sure you can use R try running the little prg just let it change to metric or if rain to inch think it will run it some times you must write 1/4 or 1/2 . you cant go over 180 R
G21
G0 T0808
G97 S360 M03
G0 X24,373 Z1,953
G50 S600
G96 S550
G1 Z-.047 F0.1
G3 X.8 Z-3. R25.
G1 X-2,028 Z-1,586
G0 Z50
M30
Good work u help me to understand the programmers number a lot thanks again
Great video Tom, you make it easy to understand, thanks.
+VICTOR HERNANDEZ Thanks Victor.
Hi Tom, great videos. Have you thought of posting one on circular interpolation for a lathe using the I and K values instead of the R value. I think this is required when there is not enough room between diameters to allow using the R value. I have never really understood how to find the start and endpoints for I and K.
i = X_center - X_start
j = Y_center - Y_start
Thanks, Tom! I like the examples you gave. I used the first just the other day when redrawing a vise from an old set of prints. The second example I probably wouldn't have thought of on my own but I can see using regularly now.
Sincerely,
Tom Z
Thanks for the feedback Tom.
Great video
how about in reference to an angle and not to a diameter?
that was interesting, I got a problem, I got a radius dataset, and I need to draw the shape that dataset represent but I only have a sequential radius points I don't know how to convert that in x y coordinated to draw the shape.
Hi Tom, can you please put up a video of how to program a multiple slots or holes using 4rt axes and mastercam 5 or newer. Thanks for the lessons very usefull
Hi Tom, great video. You have been very helpful to a new guy like me. I got the calculation, but what would the the G code look like to cut that arc??
Go3
it depends which direction you want to cut, going counter clockwise G3 which means you’ll be cutting the oposite direction a clock turns (left), going Clockwise G2 same direction as a clock (right)
You mean the cord? or are you talking about a diameter diferent than twice the radius?
Thank you Tom!!
Sir..
Plz explain how to calculate ball radius
Thank you sir
Hello sir, can you do a formula for the computation of radius from an angle with tool nose radius compensation, and thanks for all your videos it's been very helpful
I can't believe he did that all in his head
We just learned this in our 4th year apprenticeship class but we are taught to use trig. This is way easier!
cbau338 doesn't trig only work if you have angles?
yes, and the angles are there. You just have to draw them out and solve.
could/ would ? show how this would be used in a G code ?
Tom do you have a okuma captain l370 live tooling programming post fill you could provide me
Sorry I don't have that. Thanks
OK sir
Hello sir sir can you please tell me how the od,id,face and taper removes the starting value and end value fo X and z of the radius sir can you tell me if there is a formula
Sir, kindly make a video on corner radius....like ..we make sprocket...
wouldn’t it be easier C Side/square - b Side/Square = square root Of a?
we know C=2.
we Know b=2. -.146 = 1.854
so a=2.square - 1.854 square= a square root X 2 gives you that Diameter as well
Much faster, Same result
sir please radius start point & and point formula please contact me
Hello Sukhadev, Thanks for the feedback. I have a course on basic cnc lathe programming on Udemy. The videos and all other documents are downloadable. Use this code to get the course free. www.udemy.com/cnc-lathe-programming-for-beginners/?couponCode=BASICCNCLATHEGCODE I'd like you to leave feedback Thanks. Tom
V nice videos plz calcution and tha chanfer plz help me know sir
ok
p/z check
OK sir p/z send your mail I'd my drg send you and radius start point & end point calculate formulas p/z sir
Sukhadev Limbhore tstikkelman@gmail.com
send email you