Cutting curves - Page 3 - Router Forums
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post #21 of 40 (permalink) Old 02-05-2018, 06:02 PM Thread Starter
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Thanks Eric, you are right the T101AD was a poor choice. I found a T144D in a drawer, tried it and it worked perfectly. Nevertheless, per your suggestion, I will order a package of T244D.
Photo shows 3/4" plywood template, I will use the Freud top bearing bit that I received today to clean it up.

In '85 had a top of the line Craftsman, I do not remember the model, and made perfect circles using a Craftsman trammel point. There is one for sale on ebay but the distance between the rods that attach to the router base are too wide [5"] for my Makita. Festool sells a simple trammel unit [483922] for $27 but I am not sure it will fit my router. I will need a trammel to cut the drivers' holes [loudspeakers] at 277mm - inner circle. Please see template.

Cheers,
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post #22 of 40 (permalink) Old 02-06-2018, 01:43 PM
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Quote:
Originally Posted by 456GTM View Post
I found a T144D in a drawer, tried it and it worked perfectly. Nevertheless, per your suggestion, I will order a package of T244D.
If it isn't broke, don't fix it. If the T144D works for you then keep going with it.

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Originally Posted by 456GTM View Post
In '85 had a top of the line Craftsman, I do not remember the model, and made perfect circles using a Craftsman trammel point. There is one for sale on ebay but the distance between the rods that attach to the router base are too wide [5"] for my Makita. Festool sells a simple trammel unit [483922] for $27 but I am not sure it will fit my router. I will need a trammel to cut the drivers' holes [loudspeakers] at 277mm - inner circle. Please see template.
Looking at the CX3 kit it appears to have the plunge base. That plunge base uses a 8mm fence rods (I have the RT0700 kit over here complete with all 4 bases) which is the same size of fence rod used by Festool (for the OF1010), deWalt (DW613/DW615/DW621/DW622), Trend (T5), etc. So a trammel point such as the Trend BEAM/005 (see attached pic) will work on one of your fence rods or a complete trammel arm and point such as the Trend BEAM/001 or the deWalt DE6905 will work on one of your fence rods. Personally, being a cheapskate, I'd tend to opt for an offcut of thin plywood with the router screwed to one end and a veneer pin or thin screw driven through at an appropriate distance from the cutter to do a "home-baked" trammel. Don't really know about the Festool - the only one I've seen is a sort of guide rail adaptor/trammel head which requires two bars in the router. If that's the one you are referring to it won't work because the fence rod centres aren't compatible with the Makita. Personally I prefer the separate trammel head as it is more flexible - want a longer rod? Just buy a piece of 8mm diameter silver steel rod and cut to length

Edit: Just found the Festool SZ-OF 1000 and that should also work
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post #23 of 40 (permalink) Old 02-06-2018, 04:52 PM
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+1 What Eric said.
Here is an example...

That's my story and I'm stickin' to it!
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post #24 of 40 (permalink) Old 02-06-2018, 06:18 PM Thread Starter
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Trend Beams are only available in the UK, too bad I like them. I think that I will go with the homemade trammel posted by Mike.

On another note, I used the Makita with the top bearing flush bit for a couple of inches to see how it worked but I burned the material, I used a piece of poor quality Home Depot 3/4" plywood. What am I doing wrong?
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post #25 of 40 (permalink) Old 02-06-2018, 06:49 PM
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I'd be trying to leave a little less waste than that for the router, however, what speed are you running the router at? Also do you have any dust extraction on and how fast are you feeding the router? I suspect that you may be spinning the cutter too fast and without dust extraction and that your feed speed may be too low

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post #26 of 40 (permalink) Old 02-06-2018, 08:20 PM Thread Starter
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No, I do not have any dust extraction, I work in my garage driveway. Speed was at 6 - 30K rpm. Oliver and Mike suggested 1/8" excess but I will try to leave less.
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post #27 of 40 (permalink) Old 02-07-2018, 03:22 AM
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I'd try reducing your cutter speed to more like 25,000rpm ("5") and increase the rate at which you feed the router into the work a little to see if that helps. 1/8in waste is fine (sorry, couldn't see how much it was).

"The person who never made a mistake, never made anything" - Albert Einstein

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post #28 of 40 (permalink) Old 02-07-2018, 09:07 AM Thread Starter
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One more question, please. What bit should I use for cutting the holes? I understand that I should be passing the router in 1/8" increments.

Cheers,

Horacio
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post #29 of 40 (permalink) Old 02-07-2018, 03:16 PM
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I think you need to get a bit which is configured for plunging entry. These often have a small piece of pointed carbide brazed in the very bottom of the cutter, For trammel work I'd use a 2-flute straight cutter. A lot of ordinary 2-flute straight cutters are plunge-type cutters these days

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post #30 of 40 (permalink) Old 02-18-2018, 08:44 AM
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Try a couple router dealers online. Read the information provided with bits on the page and see which bit meets your needs.. I do a lot of radius work and generally stick with Amana...
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Gaffboat, MT Stringer and P.W.H. like this.

http://www.jackdurencabinets.com/homepage.htm

Last edited by Rebelwork Woodworking; 02-18-2018 at 08:54 AM.
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