Hi Tom, Have you found a pen that directly fits in the router? I found some pens around the house that where close but never a perfect fit without some modifications.
Here's my version of a pen for our machines. http://groups.google.com/group/legacy-ornamental-mills/msg/92557397d142db12 and http://groups.google.com/group/legacy-ornamental-mills/msg/93588b425a39dd33 I've updated the pen part a little since then to be made from a single piece of aluminum. Using paper taped to the waste board on the rotary table it's easy and accurate to draw patterns before you cut. Chance are I'll be proofing whatever I come up with, with my poorman's tympan chuck. Thanks for posting. -Tim ----- Original Message ----- From: Tom Dotta To: legacy-ornamental-mills@googlegroups.com Sent: Friday, July 27, 2012 7:48 AM Subject: Re: Creating spirals on the rotary table Hi Tim First time poster but I've enjoyed reading all of the posts since being allow to and thank you for that. The Ornamental turners frequently substitute a pen for the cutter and a paper holder in place of the material..Provides an accurate, cheep look. I realize ornamental lathes are more accurate than a legacy so maybe substitute a lite cardboard for the paper and find a proper sized pen to fit the router chuck. Cheers Tom Dotta On Thu, Jul 26, 2012 at 10:48 PM, Tim Krause <artmarb...@comcast.net> wrote: Hello All, I had a crazy idea that a continues single start spiral can be made on the rotary table. The goal is to get the pitch right on the x-axis. I started looking into the geometry required with a 1/2" cove bit. It looks like a spacing of .375" would do the job. In other words, the x-axis would move 3/8" with each rotation of the rotary table. I think this would create a spiral pattern but I'm not sure. Maybe the pitch needs to decrease as it get closer to the center? Then I started to consider the problem a little further. It's not quite that easy. You see, the problem is my pitch is right, but I did not take into consideration the spindle turns 8 times to make the rotary table turn once. So, I really need to take that .375" pitch and divide it by 8. The new pitch number that I need is actually .046". That way the x axis travels the .375" per rotation of the rotary table ( 8 x .046 = .375 ). Now, I can think of two ways to get the pitch so that's not my concern. The real concern is if I've come up with the right pitch in the first place and if a fixed width would even work. Any thoughts would be appreciated. -Tim -- You received this message because you are subscribed to the Google Groups "Legacy Ornamental Mills" group. To post to this group, send email to legacy-ornamental-mills@googlegroups.com. To unsubscribe from this group, send email to legacy-ornamental-mills+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/legacy-ornamental-mills?hl=en. -- You received this message because you are subscribed to the Google Groups "Legacy Ornamental Mills" group. To post to this group, send email to legacy-ornamental-mills@googlegroups.com. To unsubscribe from this group, send email to legacy-ornamental-mills+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/legacy-ornamental-mills?hl=en. -- You received this message because you are subscribed to the Google Groups "Legacy Ornamental Mills" group. To post to this group, send email to legacy-ornamental-mills@googlegroups.com. To unsubscribe from this group, send email to legacy-ornamental-mills+unsubscr...@googlegroups.com. For more options, visit this group at http://groups.google.com/group/legacy-ornamental-mills?hl=en.
