Update:
I bought the "blue Lowes" foam, which I assume is Dow Tuff-R because that's the only blue foam board they sell, and the results were disappointing.
I cut 1/16th of a medallion.
1/4"...
Type: Posts; User: skintigh
Update:
I bought the "blue Lowes" foam, which I assume is Dow Tuff-R because that's the only blue foam board they sell, and the results were disappointing.
I cut 1/16th of a medallion.
1/4"...
Do you have pictures you can share? What bits, feeds and speeds do you use? I think I need to buy a larger ballnose, the 1/8" will take over 6 hours with a profile path. Maybe I need a flute path...
Super Tuff-R is 25 PSI and says it's density is 2pcf. (So a sheet should weigh 10.66 lbs, but the sheet weighs "12.16lb" according to HD...)
Formular 250 is 25 PSI, no density given, but the sheet...
I'm a little concerned about the weight of a 34" x 34" x 2" MDF sandwich. Solid plaster is probably lighter. Also the last time I tried to CNC a simple molding out of wood it took hours, so I suspect...
Thank you everyone for your help! I will experiment with shellac and epoxy and try those tool settings.
It hadn't occurred to me there were different PSI strengths of foam. One of the Lowes'...
I have a large ceiling medallion I want to copy, what is good paintable material to use? I've read suggestions to use "Lowes foam" which I assume means Kingspan Insulation foam. Is that good? Is it...
LOL, yes, more good points! I've been using MDF so much I forgot trees don't grow in perfect rectangles.
Don't worry, I won't use a bit with a bearing and damage any bags...
I think I'm looking at a hot water base board radiator, is that right? And you want to replace the covers? If so, they aren't all $100 per 4 ft, you can get them for 1/2 or 1/4 as much depending on...
Oooooooooooooooooooh I completely forgot about the bearing on it, very good point! The bit you linked is so cheap I'll buy that if I end up using the CNC rather than grinding down my old bit, thank...
I have to make a ton of balusters, each with 4 chamfers 1-3/6 inch wide and deep. Can I use a big router bit in the shop bot?
I've used this bit on my router:
"uxcell 1/2 Inch x 1-1/2 Inch...
I think my estimate was optimistic...
I looked into router bits but could only figure out how to do half of it. But the longer I sit here the more I question doing it this way. I could 3d carve...
I made the center trench about 1/32 deep. I tried 4% and 4 IPS, it was so slow I could die.
So I started over at 4% and 6 IPS. (I wanted to stay low on the step over just to not stress the bit.)...
That's great, thank you! So you think I should stick to 3 IPS? What step over percentage did you use?
I'm going to try running this today.
I set the speed to 4 IPS pretty much randomly. The ShopBot speed sheets recommend 1.8-3 IPS and cutting 1xD. But I'm cutting up to 12xD but with only a 6% step over, so can I go faster? Even full...
Doh! It's the makerspace version so I thought I could share it, but maybe I can only share it with the same makerspace version. That would make sense...
Here is a screenshot of the molding profile...
Ok I think I attached it.
Thanks for the info and presentation!
So I made a new bit and entered the stats for the 1/8 tapered bit, including a cutting depth of 1.5 inches, saved, and... now Vetric has completely deleted...
I'm using Vcarve pro (free trial and makerspace editions) and a ShopBot Buddy.
I'm using the molding tool path. Tried with and without a clearing pass.
That presentation is enlightening. So he's saying I should skip a clearing pass, just use a 1/8 ball end, and cut the full...
I'm replicating a "classic cove and bead" molding that is about 3 inches tall, 1.5" thick, 48" long, and I'm cutting 2 of them out of a 48" white pine 2x8. (I'll then chop them up and use them as...
If the PC is grounded to 1 rod, and the CNC machine is grounded to a different rod, current can run through the commutation cable between the PC and CNC, and neither machine may be designed to handle...
That's a lot of circles. Naturally the CnC machine is getting bored and drawing outside the lines; give it a more complex shape now and then to keep it happy.
My initial thought was dust buildup...
That's a good idea about a painted cloth or screen! I'l run it by my fiancee. As long as it's cleanable -- I fear how much dust and car hair could get caught in it.
The current grille "color" is a...
I built a bench around the radiator in the kitchen and made doors to match the cabinets. The plan was to put a diamond grille and screen in the doors to allow airflow and to reflect the pattern of...
You assume correctly, on all counts. That's part of why I was curious if making a 3D shape was worth the learning curve.
Martin, Chuck,
So I did the math: 8 layers of half-flute pieces each 0.5...