Drilling Holes - Gantry Shift

I have a two part question:

I have noticed in cc the ‘drill’ function.

Is this used to simply drill holes of a specific diameter to a specific depth, or is it being used more like a drill press?

Has anyone with an S5 used the gantry shift as a means to be a drill press?
Thanks for your time

The Drill toolpath allows drilling to a specified depth, making a hole which matches the diameter of the tool which you are using.

Using it on stock clamped to the front of the machine will work, but will require a way to clamp things at the front of the machine such as:

That said, if you need a drill press, get a drill press. It’s not a terribly large tool, and worst case is you bolt it to a wall or set it in a corner.

1 Like

When drilling with a CNC unless you have a spindle that can do lower revolutions than a router it is problematic. Most drills need to be run at lower speeds than a router can do. They do make cnc drill bits that can handle the higher rpm of a router but at a cost. If you have a spindle you can get the speed down but running a router the minimum speeds are too high for drilling holes in metal.

With a router you are limited in drill size by your collet sizes. On the spindles with a collet you are only limited by the collet sizes you can get. A spindle has a different collet from a router and you can buy SAE and metric collets in various sizes to match your collet type.

1 Like

To expand on that, note that there are a couple of possibilities here, and a couple of principles to consider.

The principles:

  • an endmill is four times better at cutting to the side than cutting when moving straight down — hence the benefit of ramping into a cut and adaptive cutting
  • a drill is four (or more) times better at cutting down than it is at moving side-to-side — usually any sideways deviation is undesirable — the flutes are there only to clear chips
  • there are specialty drill/mill tools

The possibilities:

  • using a “Drill” toolpath with a “normal” endmill — this requires matching feeds and speeds to what an endmill can do in terms of plunging straight down and may also require backing out to clear chips — note that doing this with a ball-nosed endmill may work a bit better and might be worth trying because the perimeter of the cut engagement is shorter
  • using a “Drill” toolpath with a specialized drill/mill — this should work better — check w/ the manufacturer of too tool for guidelines, but remember that the guidelines are for heavy, industrial mills/routers and it will be necessary to adjust accordingly
  • using a “Drill” toolpath with a “real” drill — note that drills are rated for the RPM ranges at which they may be safely turned — this range is much lower than that at which a trim router or typical spindle can turn with the torque to power through a cut — in addition to requiring a motor/gearing which will turn the tool with the necessary force to make a cut w/o overheating the tool, this will require collets which match the shank diameter

Never use any tooling at an RPM which it is not rated to be spun at.


This topic was automatically closed after 30 days. New replies are no longer allowed.