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  1. J

    Program for an inclined broaching

    A CNC lathe with Fanuc control. What is the easiest method for programming this? Can I use an existing cycle or...
  2. J

    Fanuc parameters related to coordinates display based on wear offset

    There are 2 Fanuc controls with 2 configurations. One displays coordinates based on wear offset applied, one displays only program coordinates. Which parameter is related to....? Program line: G1 X20 Z10 F10 X offset value = .02 Displayed coordinates = G1 X20.02 Z10 F10 Which configuration do...
  3. J

    Cylindrical interpolation: Thumb rule to determine direction of G2/G3

    A 3 axis lathe equipped with C axis. I know the thumb rule to determine the direction of G2/G3 in XY or YZ or ZX plane (looking from the third view in positive...). But can't figure out what is the third view to look from to define direction of G2/G3 in the ZC plane. Appreciated for your answers...
  4. J

    Best practice to machine a cylindrical elongated hole on a turning center

    Hi! A 3 axis turning machine Doosan Puma 300M is to be used for machining this cylindrical hole. Its radius is 2.5 mm, so I used a 5 mm solid Carbide end mill (Kennametal brand) as live tool. My method is a zig zag move: (0.5 mm each pass as ramp) S1500 G01 Z-0.5 H70 F0.02 Z-1 H-70 .... Z-17...
  5. J

    CNC lathe hydraulic chuck pressure

    I have not found any info about the chuck pressure needed for an operation in my lathe manuals (A Colchester Tornado A90 machine). Does anybody have any material for this machine or any other machine? Wanna have a more view on this subject. Suppose a part is held in a hydraulic chuck and still...
  6. J

    Spindle Power / Torque graphs description

    Hi! I was reading a manual about CNC lathe chuck pressure that encountered this chart. I don't how to interpret it. Please may you describe it with 1 or 2 examples?
  7. J

    Basic questions on turning insert and holder size

    Because of my low knowledge on tooling, please guide me about this picture (Taken from Iscar catalog): The clearance angle is not fixed (3-5 degree). Is it because of error on mounted head? Insert angle is 55 degree, so why the max angle is 50? (3+55=58, so max angle seems to be 32 not 50)...
  8. J

    Tool nose radius compensation for reversed cutting edge

    Hi all! I've found informative formulas for TNRC in an old topic, here. Those formulas are for a regular angled chamfer. When the angled line is reversed and cutting is done by the trailing edge, what are the appropriate formulas?
  9. J

    Straight compensation for turning on Fanuc 32i

    Hi! There is 0.02 mm X difference on 100 mm length when turning. Is it possible to compensate this error by controller parameters?
  10. J

    Fanuc G88 rigid tapping cycle for multiple holes

    Hi! A 3 axis turning center Doosan Puma 300M. The following format is correct for multiple deep drilling (6 holes) on the part side: G54 T0101 S400 M04 P12 M35 G00 X100 Z1 C0 G00 Z-20 G87 X80 R1 Q1000 K6 H60 F.03 G00 Z1 M30 But an error is popped up for G88 rigid tapping cycle: (Illegal...
  11. J

    Runout (Roundness error) on a turned part

    Hi. I'm a newbie at CNC lathe. This part is done on a 3 axis turning machine with live tool. Unfortunately it has 0.16 mm runout. OD = 134 mm ID = 114 L = 21 Material = Steel 316 What is the correct process to achieve minimum error. (Runout = 0.02 mm). Appreciated for every little point for...
  12. J

    Fanuc 32i-A calculator input parameter for relative position

    Hi! Bit 0 (DPI) of parameter 3401 (=1) is related to the calculator input. The setting works OK but not for relative position, it still interprets 5 as 5 micron. The decimal point is necessary when presetting a value. What parameter should I change to have calculator input in relative position?
  13. J

    Unknown MDI Key on Doosan Puma 300m with Fanuc 32i A

    Hi! Would you please guide me what does that key do? How to use it?

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