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Found 7 results

  1. Hello, I've been threading parts but if I change the rpm and re-run the part to get rid of chatter the machine looses pitch, I didn't actually do this cause I knew before hand that this will happen. My question is why? and is there a way to change the rpm and re-run with out loosing pitch? Is there any relation to the rpm and start point? I ran a lathe with a Heidenhain control on it and before the threading cycle I would put a code to set the spindle orientation to 0 then the machine always new where the start of the thread was, just like a mill doing rigid tapping does internally. Does anyone know the codes to do that on a Fanuc? I'm using a Doosan Fanuc i series(not sure where to look to get more specific Fanuc info). I have two lathes with live tooling and two with out I'm sure the ones with live tooling have the options to do this cause you need to control the spindle (c axis) to do milling. Anyway any help is appreciated. TIA Greg
  2. I have some 0-80 threads I need to machine in 6061 aluminum. The problem is the depth of the hole is called out as .200+/-.01 and the min thread depth is called out as .130. Also, there's 35 threaded holes per part and we have to make 50 parts, so I'm hoping whatever method is used results in good tool life. I was hoping I could buy a 0-80 bottoming tap but I have not been able to find one of those. It seems form tapping is the usual method for 0-80 threads, but I'm not sure I have the blind hole depth to get the called out thread depth. I'm sure someone on this forum has done this before and knows a good method of machining this feature. Any help is very much appreciated.
  3. 1,736 downloads

    This is a free utility written by MTB Technical Services that generates the cycle data correctly for whatever thread you need. It's especially helpful for tapered threads. It's the perfect companion to the Vargus TT-GEN app and can only help people get more comfortable with G76. Keep in mind that this utility is just a simple little tool for properly formatting the output from the data you enter. If you're cutting anything other than a standard UN/ISO Thread, you'll need to know the proper radial thread depth. The input fields will evaluate expressions so if you have a 4-Pitch API thread you can simply type 1/4 in the input field and it will evaluate to 0.25. The Taper angle will also evaluate the trig needed based on the known taper per foot. For an API Thread with 2" of Taper per foot, you can enter atn(1/12) or atan(1/12) to get the actual per-side angle value. Visit the MTB Tech Blog for more CNC Engineering, CAD/CAM and software development posts.
    Free
  4. Hi, Attached is an image showing the issue. I am currently using Mastercam X7 MU2. When I use the backplot, the display only shows the endpoints and not the yellow path lines. This only happens with the threading tools (internal and external) and does not appear to be a problem when trying it on Mastercam X2. Has anyone seen this? I have tried updating the graphics driver and reinstalling Mastercam but the issue still appears. Thanks,
  5. Hi Can anyone tell me how to figure out the specs to machine a .774 Major Dia -32 Thread? Not sure if there is a standard formula to come up with minor dia. and thread pitch to machine and inspect custom threads. If there is, I don't know it. Thanks John
  6. I'm cutting a custom wave form thread. the thread angle is 45 degress. I have had custom inserts ground for this but was curious on the set up of my operations manager as far as infeed angles and stuff goes since a G76 cycle does not have a 45 or 90 options. I imagine I will need to use a thread angle of 0. for a direct infeed but would just like some input
  7. Hi Not a Mastercam problem, just a shop problem here. We have a batch (3,600!!) tubes that were not threaded correctly, and was wondering what the best method for chasing the threads, and salvaging the parts was. Luckily, these were run before I got here, so I just get to FIX the mess, not get blamed for it, LOL. Anyways; Specs- 4130 Cro Mo tubing, External thread 1.125-20, threaded about .600 on one end of the part. Tube body is tapered on the other end. Aprox. 12" long. Wall thickness about .100 Any ideas what YOU would do to fix these? Thanks John Spangler

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