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When I cut Lexan, I do it in 3 passes. Flood with WD-40. Then I use pass 1 at 4,000, pass 2 at 6,000 and pass 3 at 8,000rpm. Wash off WD-40 with Dawn and water.

Mike

I built one of his machines and used Gecko drives and a board from CNC4PC.com It work fine under Mach3. Mike

I am cutting polycarbonate plate with a 1/4 "60 degree 2-flute end mill. I am only cutting .030" deep. More like v-cutting or engraving. Plastic ends up getting stuck to the mill and messing up...

It does say that they are Aspire files.

what he said

Love the work!!! Nice job.

Nice work. I am interested in how you got out the pdf pages that you converted to dxfs? Would you be willing to share the pdf pages for the wood parts? I would be glad to pay you. Thanks. Mike

This is a very informative paper. Thanks for posting the link. Mike

Is the VFD set up for a PWM input to control the speed? You must also either jumper out the enable and/or direction inputs or use a contact closure, such as the spindle on/off.

Are you sure you want PWM? PWM will keep a voltage on for a period of the cycle time and then turn off. If total pulse time is 1 sec, then 50% PWM will give .50sec of full power on time and .50sec...

This guy just wants to argue for arguements sake!! acannell please PI$$ off

I had a chance to visit with Jason and see his machine on Saturday. He has done a very good job of building this machine. He is rebuilding the motors and electronic section of the machine. He...

Travel is about 12". Cutting depth is about 5". I built a 4th axis that is about 4" tall and it cuts fine with it. Thanks. Mike

I live in Indy on the northwest side. I can help you at your place or mine. I have a working cnc router that will cut 30x42 running under Mach3. Call me at 513-582-1436 or home at 731-4787. ...

How to get a 81.5" tall mill through a 83" tall opening ?

Very carefully!!!!:cheers:

Originally I had the machine mounted on a would table I built. Head was very stable. With the new aluminum one, the gantry flexs slightly. Since I do wood, corian, and lexan it is not a problem. ...

as promised

Here are the pictures of my 2nd machine as promised.

Thanks.

Can't tell if you're mocking me or not?:stickpoke

I will post pictures as soon as I reduce the size. My first one had 1/2" ground rod for rails, delrin bushings to ride on them. 1/4-20 all thread on the screws. Unipolar BOB/driver with 50 watt...

The 3 years ago came my next machine. 8020, geckodrives, 906 oz/in steppers. 60 in X axis, 22 in Y axis, 8 inch Z axis. and recently a 4th rotary axis. Cuts Corian, lexan great. Cuts my aluminum...

Several years ago I built my first CNC machine. I used Mike Wallach's plans. It was made of HDPE and Delrin. Had a combined BOB and driver board from dtllc. I learned a lot about Mach3, unipolar...

sorry, wrong reply.

Take a look at this for your testing purposes.

Did you contact the firm you purchased it from?

On the VFD's I've worked on, there is a Start/stop set of terminals and a Safeties set of terminals. These must be activated. Start/stop from a relay contact and just short together the Safeties.
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What he said.:cheers:

This whole post is assinine and completely childish. Please, moderator, close it and put it out of it's misery.

It sounds like you are using a laptop. Most laptops put out 3.3v on the parallel port. That just won't work in most cases unless you specifically have a break out board that works with 3.3v. You...