. .
  1. #1
    thinking about buying one of these

    CNC Router Rotational Rotary Axis, A-axis, 4th-axis,3-Jaw and Tailstock | eBay

    intend to engrave on the edge of fruit bowls (turned seperately on wood lathe)

    Thoughts? for... against...

  2. #2
    They are sht.

    Look nice but they are just driven via a timing belt to a straight thru spindle.
    OK for engraving on wood or candles [ unlit ] but if you try to use these in anger the cutting forces of a decent cutter will force the drive backwards.

    If you want a decent 4th axis then get a decent rotary table and fit a stepper motor to it. Because it has a 72:1 or 90:1 worm reduction it cannot be reverse driven.
    John S -

  3. #3
    I agree entirely with John S - a timing belt, particularly a small one like that, is not much use for a 4th axis since the stiffness of the belt is too low. Unless you want to splash out on a harmonic drive (eBay), then a rotary table is a good way to do it.
    Old router build log here. New router build log here. Lathe build log here.
    Electric motorbike project here.

  4. #4

    I agree with Jon that it would be suitable for your intension. Don't waste your money though, a couple of Pillow blocks and a cheap chuck, a bit of round rod and a backing plate for the chuck would suffice. If you want to do more with it though hi torque and sensible gearing is required. Harmonic dives are out of reach for most people unless you are lucky on the bay.
    If the nagging gets really bad......Get a bigger shed:naughty:

Thread Information

Users Browsing this Thread

There are currently 1 users browsing this thread. (0 members and 1 guests)

Similar Threads

  1. Replies: 9
    Last Post: 21-02-2014, 08:57 PM
  2. Initial thoughts on new build
    By Neale in forum Gantry/Router Machines & Building
    Replies: 4
    Last Post: 25-01-2014, 10:05 PM
  3. He's added a fourth axis
    By GeorgeD in forum Gantry/Router Machines & Building
    Replies: 39
    Last Post: 01-08-2010, 07:33 PM
  4. Some thoughts on using supported rail
    By Ross77 in forum Rails, Guideways & Bearings
    Replies: 0
    Last Post: 29-01-2010, 06:13 PM
  5. Any thoughts on pendants?
    By Robin Hewitt in forum Machine Discussion
    Replies: 5
    Last Post: 27-12-2009, 06:28 PM


Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts