17835 forum posts
The subject of the CNC crankshaft cutting code that the late JS used to run as a demo at shows has come up on MEM forum.
Does anyone have a working copy of the code that they could let me have, it seems the one in circulation does not cut enough metal as the downfeed per pass is too small. Or if you know what other forums JS may have posted it on, I have seen the post on this forum.
I have enquired wit Ketan but need to wait for Ian to return for an answer.
Edited By JasonB on 31/08/2019 08:28:34
|1445 forum posts|
I see in 1 post it cuts 1mm per pass and in another the code posted at your linked page worked OK with Mach 3.
17835 forum posts
Emgee, I don't think anyone has got it to cut, the guy who says it ran OK in Mach3 was air cutting, when he later tried it on metal he got the half moon cut as per Vixen's (mike) posts see his reply in this post
|356 forum posts|
JasonB, I have a copy of the code but at present I am in sunny Devon on holiday. When I get home you are more than welcome to a copy of it.
17835 forum posts
Thank's Baz, will PM my contact details.
|Vasantha Abey||01/09/2019 05:03:14|
|16 forum posts|
I am from Sri Lanka and if you can let me have a copy I will appreciate that too. I tries to make a Mitusubishi Evolution Crank shaft from a a billet of EN19 steel. I tried a 2d sketch of pin and journal plan view on Solid works, and the curser allows the coordinates to see at the bottom.You can divide the contour to say 60 points, note down the x,y points.
later you can write a G code program, switching y axis to z on you MS Note pad. keep the x as 0. Of course you need a 4th axis to turn the crank shaft. This is a very difficult process, but you can do it. The end mill on the spindle need to rise and fall during the rotation of the dividing head. I have used a servo motor driving a toothed belt that slips on an aluminum toothed rim tightly fitted to the pheriphery of the divider plate. The servo motor also has a toothed wheel and with an encoder. The cnc mill has a Centroid CNC 4 axis installed and the mill is an OKK Mill.
Remember that the pin travel like a clock hand and round the center of the journal . On solid works 2D drawing, you have to draw at least 20 circles or more right round the journal center and circles are in orbit. Then you can use the curser to plot suitable cordinates on top of each circle and write a gode program. the X cordinate should be made Z. I will soon send you the G code program I used but to day is Sunday so will do it on Monday.
|John Pace||01/09/2019 20:33:07|
|177 forum posts|
Posted by Vasantha Abey 01/09/2019 05:03:14
I am from Sri Lanka and if you can let me have a copy I will appreciate that too. I tries to make a
later you can write a G code program, switching y axis to z on you MS Note pad.
Remember that the pin travel like a clock hand and round the center of the journal .
Having done some of these type of plotting type job i know how tedious
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