General Discussion | Setup of tools on older machine with toolholder on X- side

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Setup of tools on older machine with toolholder on X- side (3 posts)

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  • Profile picture of Nick Nick said 1 year, 8 months ago ago:

    I have an older machine I am setting up, using BobCAD-CAM V24. The toolpost is on the right side of the machine (‘X-’ looking down from the spindle along Z). I have had some disucssion with BobCAD techs that I still need to model in the upper left quandarant of CAD as if the toolholder is on X+. I was also directed to modify the post processor code to mirror the commands to accomodate the X- toolpost (it was line 200 and something on EMC post processor).

    Here is the code change;

    247. Sign of X Spindle 1 (p = pos, n = neg, e = either, r = reverse)? R

    My question is how do I setup the tools in the libary based on this – such as I have a left handed tool. do I set it at a left-handed location as it would be seen from the current tool view in BobCAD if the toolholder were on X+? The cutting direction and everything changes when you mirror it over, does the change to the post-processor take that into account?

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  • Profile picture of Sowen Sowen said 1 year, 8 months ago ago:

    The tools will need to reflect the orientation of the part drawn. If your drawing the part in the upper left for most tools your orientation would be a 1.

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  • Profile picture of Nick Nick said 1 year, 7 months ago ago:

    Well, for anyone else who happens upon this, you don’t really need any changes to the post processor for lathes with toolholders on the operator’s side. The reason is the default way to setup your axis is for X+ to be toward the toolholder side (away from the spindle), in this case the operator side as well.

    So when you draw in BobCad in the 90 to 180 deg quadrant, you are always drawing in the X+ side by default.

    In order to visualize what the actual motion will look like, I’ve found if you look at it from ‘bottom’ view this will match the axis orientation and is what the motion will look like on your machine (when you look at it from the top). That makes X+ to right of spindle and Z+ away from spindle.

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2013-05-24 01:12:41