Free Router plans! and Discuss it here.

[PaulH]

You could volunteer to do it, if you're really interested. 1 inch = 25.4 mm

[alarants]

I do not understand their love to inches either. Especially what they are using to measure torque: lb/in or oz/in or something like that. Nevertheless this has not stopped me to copy their constructions. Imagine if they can make such a wonderful constructions in inches what they could do if they knew metric measurements.

Best Wishes
Alar

[trilect]

We'll I ordered meshcam/mach2, controller and motors from xylotek. And I have a will call pick up for 3/4 " baltic berch plywood on the way home.

I figure its a start.

[phoneman]

I just joined the group and the thread. very interesting plans. How hard would it be to add the forth axis (A) to the table. Also is it possable to get a CAD file of the drawings.

Dave

[CNCadmin]

here you go- http://www.cnczone.com/modules.php?n...viewfile&id=24

[Lionclaw]

JGRO, Awesome plans Extremely detailed.

I'm not sure if you're still maintaining them, but I noticed what might be a few small mistakes. Some of the pages have an empty quantity block(the number can be found in the parts list anyway). But also, for parts CNC_dtl01 and CNC_dtl02 I believe the stock size is listed at something like 1.5x8.25x16.25, when, unless i'm mistaken, should be listed at 1.5x8.25x32.5. Those numbers are just off the top of my head, but you get the idea.

[Dylwad]

Hey guys,

Were coming along on the router, got the ends of the 1/2-8 2 start acme turned down and drilled/tapped, and made a tap out of it for 6 delrin blocks, very smooth. We will post some pics soon.

Anyone want to help me out with some math?
Also, when you figure out your resolution, do you go off of 200 steps per rev, or 2000 when your microstepping?

heres the math...
1/2-8 2 start- 4 turns per inch
40,000 steps per second
8000 steps per inch

What RPM will i get at 40k SPS? I came up with 1200
How many IPM am i looking at? 300?

From what ive read 1/2 leadscrews start singing around 450-500 RPM so im thinking 100IPM shouldnt be a problem on this rig.

Am i totally off on my math? anyone have some formulas to use to make life easier?

Thanks,

Dylan

[Dylwad]

one more thing, is there any way to be able to see more than 5 posts per page on the forum? its kind of annoying when im used to 50 or so per page on ezone.

[CNCadmin]

Originally Posted by Dylwad one more thing, is there any way to be able to see more than 5 posts per page on the forum? its kind of annoying when im used to 50 or so per page on ezone.

You can change the default thread view in the usercp.

[ger21]

Originally Posted by Dylwad Anyone want to help me out with some math? Also, when you figure out your resolution, do you go off of 200 steps per rev, or 2000 when your microstepping? heres the math... 1/2-8 2 start- 4 turns per inch 40,000 steps per second 8000 steps per inch From what ive read 1/2 leadscrews start singing around 450-500 RPM so im thinking 100IPM shouldnt be a problem on this rig.

If your using geckos with 10x microstepping, then you'll have 4 tpi x 200 steps/rev x 10 (microsteps) = 8000 steps/inch, like you said.

40000 steps/second * 60 seconds / 8000 steps/inch = 300 ipm, @ 1200 rpm.

Leadscrew whip is dependant on length, and how it's mounted.

The speed of the machine can be limited by many factors. Motor torque, voltage supplied, friction. Because stpper torque can drop off quickly, especially at lower voltages, you may not have enough torque to get to your theoretical 40,000 steps/s.

Depending on the torque of the motors, you might get 100ipm rapids, but may not have enough torque at that speed to cut materials.

What size motors (ratings) , power supply and what drivers are you using?

[Dylwad]

Wow, Great reply,

The motors are 640 oz 2.3 volt 5.5 amp nema 34 www.homeshopcnc.com The leadscrew nuts are 1.5 inch delrin, doubled up on each axis. one of the leads is 6 feet long too....hopefully the 3 inches of nuts and some tension will help to smooth things out.

Power supply im looking at 48 volt 12 amp units, but we may build our own, so about 20 times motor voltage.

The leadscrews have dual bearings on each end, and will have a bit of tension to them.

Were not planning on cutting anything anywhere near 100IPM, but it would be nice to have some decent rapid speed.

I just realized the deskcnc controller has a 125000SPS max......http://www.deskcnc.com/controller2nd.html

So, one more time, this is the rundown

cutting area around 5'x3'x5"

640 oz steppers
z axis geared 1.5:1 or 2:1
1/2-8-2 start leads
gecko 201's
48 volt 12 amp supply
deskcnc software and controller
full size PC router

Mainly cutting 1/4"~1.5 inch foam.

gas pipe rails on x and y ,X is supported in the middle, and THK style on the Z
pipe adjustment blocks are 3/4" aluminum tapped for adjusters.

sound like it will work?

Thanks,

Dylan

[ger21]

Originally Posted by Dylwad Were not planning on cutting anything anywhere near 100IPM, but it would be nice to have some decent rapid speed.

I bet you'll want to after you use it for awhile. I wouldn't think you'd have a problem cutting foam at that speed, as there would be basically no load on the spindle.

Sounds like it should work OK, but the power supply might be a bit marginal on the current rating. Might be OK, though.