Retro fit core drill for motorised z axis suggestions

Retro fit core drill for motorised z axis, suggestions.

I have a new project and I want to cut some cores out of stone so I'm thinking of getting a, not so expensive bench core drill, and retro fitting the z axis so I can be cutting the cores slowly but efficiently and doing other things at the same time.

I'm thinking a pulley and motor may slip .. unless say I use a toothed car cam wheel type setup ? Direct stepper motor may be a bit to large to produce the torque ? Not sure I'm no expert :)

Example pic

Attachment 24361

its basically a very small version of this below which i think is really cool lol :)

https://www.youtube.com/watch?v=QzfjJY1mppA

Do you need fixed feed speed or fixed cutting pressure?

Quote:

---

Originally Posted by magicniner

Do you need fixed feed speed or fixed cutting pressure?

---

I was thinking fixed cutting pressure , cutting speed would depend on material and also help tool life I think.. not sure lol

I had thought of putting a wide pulley on and fixed weight on a chain, seen this done for other things

Quote:

---

Originally Posted by Fivetide

I had thought of putting a wide pulley on and fixed weight on a chain,

---

My thoughts too, if fixed force.
For fixed speed a stepper, stepper driver, variable frequency pulse generator and toothed pulleys & belts.

Quote:

---

Originally Posted by magicniner

My thoughts too, if fixed force.
For fixed speed a stepper, stepper driver, variable frequency pulse generator and toothed pulleys & belts.

---

Yes agreed.. I think ill try that.. keep it simple rule. Thanks magicniner