[gcofieldd]

Hoss, I was looking around and found this motor (see link below) and was wondering if you thought it would be good for a BF20/G0704? I was thinking about using a KBVF-14 or a KBVF-26D to control it.

AC & DC Motors, Universal Motors | Groschopp Motors

There is a torque curve available on the mfg website. They also have a 3d model of the motor available.

Thanks

Graham

[dongmingalu]

that's correct.
but couple years too short still.

[Gar33nett]

Ill try to figure out how to post some tomorrow after I awake..

[hoss2006]

I'd ask the manufacturer of that motor what they suggest for driving it, a more typical sensorless vector vfd might be a better choice. The motor looks like a nice fit for the mill.
Hoss

[recordingwhiz]

Ill attempt to add the pics of the lights I suggested.

Attachment 184832

Attachment 184834

hope this works.

oh yeah, they plug right into any wall outlet and they have a switch on the magnetic base.

[cjsamples]

Those lights are pretty sweet! I will have to get one of those on my router so I can see what is going on.

Chris

[gcofieldd]

I'd ask the manufacturer of that motor what they suggest for driving it, a more typical sensorless vector vfd might be a better choice. The motor looks like a nice fit for the mill.
Hoss

Thanks for getting back to me Hoss and sorry to keep bothering you. I think I will run the factory motor until it quits then try this one.

[fretsman]

Ill attempt to add the pics of the lights I suggested.

Attachment 184832

Attachment 184834

hope this works.

oh yeah, they plug right into any wall outlet and they have a switch on the magnetic base.

Thank you, that seems to be a good bit of light, and the adjustability makes it very handy as well, thanks for sharing-

Dave

[hoss2006]

Those lights look nice, thanks for sharing.
Been busy outside, now have access ramps to the front of the house.:banana:
Later this summer I'll have some concrete work done to get access up to the driveway to get to my truck.
Hoss

[Fastest1]

Oh no Hoss has felt the sun again. Where are you? Sunbathing?

[hoss2006]

Yeah, working on getting a good base. lol
It's nice to sit out on the deck with my morning coffee again.
Hoss

[fretsman]

Yeah, working on getting a good base. lol
It's nice to sit out on the deck with my morning coffee again.
Hoss

[Jere33my]

It's nice to sit out on the deck with my morning coffee again.

[3space]

[nomedia="http://www.youtube.com/watch?v=6vhhSoWHE9w"]YouTube - G0704 Power Drawbar Test.wmv[/nomedia]

Why in your video is there an exhaust sound at 2:10, then the PDB movement at 2:13. Not sure what the exhaust sound is. Thanks.

[hoss2006]

I said in the video the solenoid valve wasn't hooked up yet, I was testing it by using an air nozzle to blow into each line, the exhaust noise is the air escaping.
Hoss

[hoss2006]

The newer power drawbar is better, you can see how it works in this video.
Hoss

[3space]

I said in the video the solenoid valve wasn't hooked up yet, I was testing it by using an air nozzle to blow into each line, the exhaust noise is the air escaping.
Hoss

OK, got it, thanks!

[3space]

The newer power drawbar is better, you can see how it works in this video.
Hoss

OK, yes, great! So, given your depth of knowledge on this, maybe you can short circuit my learning curve here! I have a new SX3 that I'm finishing CNC'ing now. I just acquired a 4" bore / 4" stroke SINGLE-stage double-acting Bimba cylinder on eBay. I figured if direct-acting didn't work, I could use a levered setup like you did on one of your machines. I guess with 100psi, I'd get 1257 lbs in the direct-acting configuration. I'm using this for TTS. Is it certain that I'd need to do a levered setup? Also, I am having trouble finding out exactly how the bellevilles are stacked onto the spindle. Could you please point me to a link, where somebody has done it for the SX-3?

Thank you!

[hoss2006]

Don't have any bookmarks for sx3 pdb's but search youtube, I know there are some.
I use a stack of 3 pairs of bellevilles in series as shown here.
Shop Info
Direct acting with your cylinder would be good for light duty like I did on the X2 if you lock your quill though you have much more stroke than needed, 1/2 inch is usually plenty.
You could use that stroke, as you mentioned with a lever setup similar to my X2, to get much more force but you'd want that force with the floating type pdb to avoid unnecessary strain on the bearings and quill lock.
Hoss

[3space]

Don't have any bookmarks for sx3 pdb's but search youtube, I know there are some.
I use a stack of 3 pairs of bellevilles in series as shown here.

I had actually been to your site, and learned about bellevilles from there - thanks for your most excellent work, and sharing it with all of us. Very awesome of you! So, in other words, ()()(). So F1/D6? From where did you acquire the Belleville's?

Direct acting with your cylinder would be good for light duty like I did on the X2 if you lock your quill though you have much more stroke than needed, 1/2 inch is usually plenty.

So, 1250 lbs +/- good for light duty. Great information. The Z-bot/Hoss levered design looks good, but requires a little more time/effort. I am hoping to get something in place quickly, so maybe I'll do it the first way, then make the parts for the levered design, then change it up later on, after using the mill to make the parts for the levered design. I had wanted to find a Fabco-air 4" multi-stage cylinder, but there have been none for anything significantly below retail that I could find, at least for the last little while.

By the way, is there a problem with only using a portion of the full stroke? Like if I only use 1/2", wouldn't that be fine? With respect to the "floating-type pdb", do you mean the bracket that springs up as the drawbar is depressed? What exactly is happening there? If I want 1800 lbs, for example, to fully depress the bellevilles, but there is only 1250 lbs, then am I not decreasing the downward force by having springs absorb some of it? (It is very likely that I'm just not hearing you right)

Finally, with respect to the strain on the bearings and quill lock, is the quill locked permanently while using the mill in CNC mode?

Thanks for all your help/advice!