Vedic engineering

Fundamentals This cycle does a peck drilling operation for grooving or drilling perpendicular to the axis. The cycle can actually be used to cut multiple grooves, or (on a machine with a C-axis and live tools) drill multiple radial holes at various positions along the length, The explanation here is restricted to cutting a single groove. Structure ______ G75  R G75  X  P  F _______ R= Retreat amount after each peck, radial distance. X= X coordinate of groove bottom (Diameter to cut).  P= Peck depth, radial distance in micron. F= Feed rate. We can remove material performing single groove same as insert thickness as well as more than that. Example of single groove as insert thickness ________ G00 X54.0 Z-20.0; G75 R0.5; G75 X30.0 P1000 F0.1; G00 X100.0 Z50.0; _____ Example of Groove more than insert thickness Let the groove width is 5mm of the above drowning ________ G00 X54.0 Z-20.0;   (using 3mm insert thickness) G75 R0.5; G75 X30.0 Z-25.0 P1000 Q2500 ...

Fundamentals:- The cycle G74 stands for longitudinal cutting process. Where we remove material from face ether performing as drilling cycle or face grooving, the cycle is beneficial to cut stubborn materials like stainless steels. Because of complete material removal motion. In G74 cycle we can cut through along with 'Z' axis as well as 'X' axis, also can use on turnmill operations while drilling off centre drills. Format of G74:- ________ G74 R G74 P Q X Z F ________ R- retraction amount. P- shifting value while cutting along X axis in micron. Q- Depth of cut in micron. X- Cutting last destinations along X axis. Z- Cutting last destinations along Z axis. F- Feed. Note:- shifting value 'P' should not exceed the width of grooving tool. If tool width is 4mm then shifting value should be 3.5mm. Example:-   G00 X40.0 Z2.0; G74 R0.5 (shifting value); G74 P3500( 3.4 shift value) Q500 (depth of cut) X52.0 Z-7.0 F0.07; G00 Z10.0

Fundamentals of G74 peck drilling cycle Here is a cnc programming example for simple drilling on a cnc lathe machine. CNC Fanuc control has a very powerful and versatile peck drilling cycle (Fanuc G74) which relieves us from many unwanted chores. Although Fanuc G74 peck drilling cycle for fanuc cnc control can be used in variety of ways but this cnc programming example is just doing a simple peck drilling. One thing for newbies in cnc field is that we can simply drill a component by just giving a feed with G01. G00 X0.0Z1.0 G01Z-10.0 G74 cycle does a peck drilling operation to drill a hole along the axis. The cyce can actually be used to drill multiple axial holes at various positions on the radius on a machine with a C-axis and live tools. The explanation here is restricted to drilling a single axial hole. If we can drill with the above method them why use a peck drilling cycle. Actually peck drilling (Fanuc G74) gives us some hidden benefits like Longer drill life Proper chip breakin...

When using roughing cycles on a CNC lathe we have a few options. The standard G71 cycle roughs the profile using linear moves along the Z-Axis. The G72 cycle is used for facing and the G73 pattern repeating cycle is used when we are machining a profile that is already cut. For example, a casting or a pre-machined part. Below we take a look at this G73 cycle and how it works. What is the G73 pattern repeating cycle? The tool will cut in the shape of the profile that we defined with a subroutine when using the G73 G-Code. If used on a billet, some of the tool paths will be cutting in fresh air. This is why it is normally used when we already have the profile of the part pre-cut or cast. The tool will cut the shape of the profile of the part on each pass, indexing in both X and Z by the amount that we add to the first G73 line after each pass until the finished size is achieved. G73 pattern repeating roughing cycle The G73 cycle block should look like this example. Each part is broken dow...

Introduction to G72 cycle This cycle generates a part shape from a cylindrical raw material, with cuts perpendicular to the axis. The cycle definition has the part shape, depth of cut, finish allowance and couple of other parameters. Fanuc G72 Facing Cycle If you have spent some time on cnc machine with fanuc control in cnc machine workshop, then you might surely have used  G72 Canned Cycle Facing  and cnc turning cycle G71. Because cnc cycle programming in fanuc cnc control is just easy. Why do we use cnc cycles read  pros and cons of cnc programming cycles . In this post I am going to elaborate the use, and programming of the  G72 Canned Cycle Facing  on Fanuc cnc control. Fanuc cnc control is widely used, no doubt one of the most favorite cnc control of cnc programmers, due to its ease of programming and durability. Programming G72 W R G72 P Q U W Parameters First Block Parameter Description W Depth of cut. R Return value after a cut is complete. Second Blo...

Introduction of G71 It is a canned cycle- multiple cut cycle. G71 cycle is a stock removal cycle, removing stock material from work piece performing turning operations ( turning operations- feed against 'Z' axis reducing diameter ) Turning cycle- G71 Turning cycle - G71 This cycle generates a part shape from a cylindrical raw material, with cuts along the axis. The cycle definition has the part shape, depth of cut, finish allowance and couple of other parameters. Cycle format G71 U(D) R G71 P (NO.1) Q(NO.2) U(u) W(w) F N(NO.1)_ _ _ _ Cutting address (shape definition) N(NO.2)_ _ _ _ _  U(D) = Depth of cut, radius value R = Retract amount, radius value  P=Number of the first block of the shape  Q=Number of the last block of the shape  U(u) = Finishing allowance in X, diameter value  W = Finishing allowance in Z   F= Feed rate The blocks after the second G71 block define the part contour. Parameter P has the number of the first block N(No.1) and  ha...

Fundamentals of CNC Introduction In the earliset efforts to attain automations, the general process of searching for improvement and elimination of wastage was resorted, so as to achieve reduction in the cost of production. The process is know as rationalization when it is coupled with mechanization It leads to automation. The degree of mechanization may vary to suit the level of production. Automation is a technology of working in which handling methods, process and design of products are integrated to utilize economically justifiable mechanization of thought and effort to achieve automatic and self-regulating chain of process. Early automatic devices Early automatic devices attempted gradual replacement of human labour by adopting mechanical electrical technologies capable of doing physical and even mental work as in numerical control or adap control machines. Falcon Knitting Machine : In the early 1700's, M. Falcon invented a perforated card controlled knitting machine. Eac...