English Wheel

[pro70z28]

I am building an English Wheel for the upcoming rebuilding of the firewall in the "Z" - 70 camaro.
I planned to weld it together yesterday, but I stripped the threads in the TIG torch so that was the end of that for now. Below is the lower anvil assembly I cut out of aluminum on the shopbot. I'll post a couple more pics. when the welder is back in operation.

[img]http://img.photobucket.com/albums/v2...lishwheel1.jpg[/img]

[img]http://img.photobucket.com/albums/v2...lishwheel2.jpg[/img]

[img]http://img.photobucket.com/albums/v2...lishwheel3.jpg[/img]

[img]http://img.photobucket.com/albums/v2...lishwheel4.jpg[/img]

[john_l]

That's very cool. I have seen a few of your other posts a little while back. I think it's neat you handle that thick aluminum like a very well equiped machine shop.

You may have posted this before, sorry. But what machine, bit, feed rate, and step down are you using to get these great results?

[pro70z28]

Thanks John. I have the tools preset from a long time ago, so I'm going from old memory here. 2 flute carbide 1/4'' bit. I "think" the feed rate is. .03 & Step down is .03. I might be off on that a little. Then I just set the spindle speed til' I get nice chips & the cutter sounds right.

[geneb]

Gary, how do you get the speed down that far? I've been cutting 6061 recently and the only way I can keep from destroying bits is to set my feed to 2.0 and then change the VU speed divisor (I don't recall the exact name of the parameter) to 16. It was my understanding that the SB software won't take a Movement Speed of less than .4. Is this no longer the case?

tnx!

g.

[beacon14]

The lowest move speed SB will accept is .05 ips

[pro70z28]

It will go lower than .05. When you send the job a warning will come up saying you are outside the parameters of the program. I just tell it to run anyway and it bypasses the warning.

[beacon14]

Does it not reset the speed to .05 after you accept the warning?


46239.jpg

[Brady Watson]

For speeds lower than let's say .4 IPS, try using the "Slow Speed Generation for Unusual Requirements" under VU in the control software. It will effectively divide the clock that the SB runs on to enable smooth, reliable cutting at ultra slow speeds. Remember to change the setting back to 1 when you are done slow cutting.

-B

[geneb]

Is there a magic dividing number that will effectively make inches/sec actually inches/minute?

So doing VU<whatever> would mean MS,1.0,0.5 actually be moving in inches/minute?

tnx!

g.

[Brady Watson]

The 'Slow Speed Generation' cannot be used to adjust from IPS to IPM. The very simplest way to handle this would be to use the following conversion:

MS in Inches per Second = Inches per Minute divided by 60 (IPS = IPM / 60)

MS in Inches per Minute = Inches per Second times 60 (IPM = IPS x 60)

-B