[papercreters] Re: Scissors mixer

Spaceman,

This is just theory, but it looks like your "cutter blades" are going to turn too fast. The pulleys look like about a 2 to 1 slowdown. So if the motor is 1100 rpm, the cutters will spinning about 500 rpm. You may need a jack-shaft to drop it down further.

It would also increase the power of the cutters.

Just guessing.

Bobby



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Re: [papercreters] McCain scissor mixer vs spacemans

Thanks Charmaine, that helps. I must have missed your photos and full description. It looks like his whole thing is a lot smaller. I'm afraid mine will be too robust, should know in a couple of hours since I intend to test today.

It looks like he used smaller angle iron, but yeah, I used what I had and bigger is better, right? I'm already anticipating shortening my blades. While his pipe is thicker than my shaft, I used solid steel which should be at least as strong. I left the extra metal on top of the fork because I only had to cut that piece once, better utilizing the scrap I had, and I figured it would give some amount of mixing action on top as well as on bottom. I can always cut them off if they just trap paper or something. There isn't much clearance between the spinning blades and the stationary fork, maybe the orientation of the angle won't be a problem. All in all it is basically the same design so obviously I saw enough detail in the one photo I had seen that the rest followed logically. Mike is very innovative when it comes to pc mixers.

spaceman

On 10/9/2012 12:36 PM, Charmaine Taylor wrote:

 The Scissor blades Mike created differ in  4 ways, but yours looks very similar. If you run into snags in use consider these differences to see if it makes a change for improved performance.. which all that counts.

My friend Dave  bought these blades from Mike for $75. 7 years ago before he stopped making them.

I am attaching a photo of the assembled mixer, I can't seem to access the photo files.

1. The  angle iron  used is thicker, and the slide-thru power rod is thicker, but use whatcha' got, right?.

2. the spinning blades are much shorter...half of what shows here AND    they are attached  as TWO pieces  on one pipe. so the angle faces in opposite directions when welded on.

AND the  short spinning angles  are NOT  facing  sideways as yours are.  You may lose chopping power that way.

If  you took a longer  attachment pipe, and welded  two of    3"-4" blades  on again  the  angles face  opposite eachother.  Mike said it gave even more chopping power as the paper is being forced thru the 3 blades.

3. the bottom  angle brace for the 3 blades is turned the opposite way to match the angle of the 3 blades., so paper wont trap against it. and it is not attached to the barrell, just rests on the bottom.

4,  the welded pipe  circles are right at the top of the  3 blades. no extra metal  sticks up.

  For some reason Mike found shorter spinning blades worked better.  your assembly looks the same for powering up.
To support Mike I had offered a set of the assembly and parts  photos for sale  $12.00 when I had the big bookstore but have't put them on the small site.    He wanted others to make their own when he stopped selling sets himself, and had no time.
A few months ago I think I posted photos here and a full description of assembly, maybe it was OA list.. anyway they are very simple, once seen, to make.

but what you show here may be close enough that everyone can make their own.  good luck!

--
Charmaine

Charmaine Taylor/Publishing & Elk River Press
PO Box 375 Cutten CA 95534
www.papercrete.com
 
 Robert Heinlein (1907-1988) "There is no worse tyranny than to force a man to pay for what he does not want merely because you think it would be good for him."

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Checked by AVG - www.avg.com
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[papercreters] McCain scissor mixer vs spacemans [1 Attachment]

[Attachment(s) from Charmaine Taylor included below]

 The Scissor blades Mike created differ in  4 ways, but yours looks very similar. If you run into snags in use consider these differences to see if it makes a change for improved performance.. which all that counts.

My friend Dave  bought these blades from Mike for $75. 7 years ago before he stopped making them.

I am attaching a photo of the assembled mixer, I can't seem to access the photo files.

1. The  angle iron  used is thicker, and the slide-thru power rod is thicker, but use whatcha' got, right?.

2. the spinning blades are much shorter...half of what shows here AND    they are attached  as TWO pieces  on one pipe. so the angle faces in opposite directions when welded on.

AND the  short spinning angles  are NOT  facing  sideways as yours are.  You may lose chopping power that way.

If  you took a longer  attachment pipe, and welded  two of    3"-4" blades  on again  the  angles face  opposite eachother.  Mike said it gave even more chopping power as the paper is being forced thru the 3 blades.

3. the bottom  angle brace for the 3 blades is turned the opposite way to match the angle of the 3 blades., so paper wont trap against it. and it is not attached to the barrell, just rests on the bottom.

4,  the welded pipe  circles are right at the top of the  3 blades. no extra metal  sticks up.

  For some reason Mike found shorter spinning blades worked better.  your assembly looks the same for powering up.
To support Mike I had offered a set of the assembly and parts  photos for sale  $12.00 when I had the big bookstore but have't put them on the small site.    He wanted others to make their own when he stopped selling sets himself, and had no time.
A few months ago I think I posted photos here and a full description of assembly, maybe it was OA list.. anyway they are very simple, once seen, to make.

but what you show here may be close enough that everyone can make their own.  good luck!

--
Charmaine

Charmaine Taylor/Publishing & Elk River Press
PO Box 375 Cutten CA 95534
www.papercrete.com
 
 Robert Heinlein (1907-1988) "There is no worse tyranny than to force a man to pay for what he does not want merely because you think it would be good for him."

Attachment(s) from Charmaine Taylor

1 of 1 Photo(s)

BladesDave2clBladesDave2.jpg

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[papercreters] Scissors mixer

I have the beast almost ready to go, a couple of hours tomorrow should complete it ready for smoke test.

I took a few photos today and posted them on a website so those who get the digest or read on the website instead of individual emails won't miss out.

http://www.starship-enterprises.net/ScissorsDrumMixer/

Fire away!

spaceman

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Re: [papercreters] New scissors barrel mixer

Donald, Did you build your tow mixer? If you did then why not just fix it? Alan in Michigan --- On Fri, 10/5/12, Donald Miller <donald1miller@yahoo.com> wrote: From: Donald Miller <donald1miller@yahoo.com> Subject: Re: [papercreters] New scissors barrel mixer To: papercreters@yahoogroups.com Date: Friday, October 5, 2012, 12:13 PM Well, Spaceman, it seems you're getting a lot of free advice from the sidewalk superintendant set. I really like your setup as I've always thought that the scissor concept would be great. Any design usually takes a few tweaks here and there to get up to speed. I'm really anxious to see how it works, and I'm sure it will, as my tow mixer crapped out on me and this could be a good alternative.  you build your tow mixer?

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Re: [papercreters] New scissors barrel mixer

Free advice can be good. It doesn't cost much and someone may notice something I missed.

I'll post again with more pix and maybe a link to a video when I get it done and munching paper. I'm expecting it to be too robust. No doubt a top of some sort will cut down on splash and I may have to trim the blades back. I'm adjusting my pulleys for the lowest speed I can get, which will probably still be too much. I have a smaller motor in reserve, with a tiny pulley on it to slow it down even more. We'll see.

On 10/5/2012 10:13 AM, Donald Miller wrote:

Well, Spaceman, it seems you're getting a lot of free advice from the sidewalk superintendant set. I really like your setup as I've always thought that the scissor concept would be great. Any design usually takes a few tweaks here and there to get up to speed. I'm really anxious to see how it works, and I'm sure it will, as my tow mixer crapped out on me and this could be a good alternative. --- On Fri, 10/5/12, spaceman <Spaceman@starship-enterprises.net> wrote:

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Re: [papercreters] New scissors barrel mixer

Well, Spaceman, it seems you're getting a lot of free advice from the sidewalk superintendant set. I really like your setup as I've always thought that the scissor concept would be great. Any design usually takes a few tweaks here and there to get up to speed. I'm really anxious to see how it works, and I'm sure it will, as my tow mixer crapped out on me and this could be a good alternative. --- On Fri, 10/5/12, spaceman <Spaceman@starship-enterprises.net> wrote: From: spaceman <Spaceman@starship-enterprises.net> Subject: Re: [papercreters] New scissors barrel mixer To: papercreters@yahoogroups.com Date: Friday, October 5, 2012, 8:57 AM   The bolts go through the shaft. I agree that the bolt should probably be hard, but I didn't have any in stock, and these will be trivial to replace if/when they break so I won't worry about it until I get to test. Haven't had a chance to get back to this, maybe today or tomorrow if things go well. On 10/2/2012 9:52 PM, clarke2 wrote: I'm thinking the bolt keying to the shaft might be the weak point unless the shaft has a deep well for the bolt to register in. T And the bolt should be hardned. Just my 2 bits. Dan ----- Original Message ----- From: "spaceman" <Spaceman@starship-enterprises.net> To: <papercreters@yahoogroups.com> Sent: Tuesday, October 02, 2012 9:00 AM Subject: Re: [papercreters] New scissors barrel mixer Well the photo doesn't show a lot of detail, but I can assure you that I welded those nuts to the angle so they won't come off unless the angle is ripped apart. The welds aren't pretty but they are strong. A sledge hammer weld check confirms this. This is 2x2 angle as you guessed. The blades are 16" long which I suspect may be a bit much but I made it so I can take it apart and modify as needed. I tried to get it finished yesterday, got the motor mounted, but still need a couple of hours tying up loose ends. No time today, maybe tomorrow. On 10/2/2012 8:45 AM, Ron Richter wrote: Spaceman, I see where you bolted the nuts to the drive bar, but with paper in there and water it looks like you'll need a bit more weld to hold the nut to the angle iron. If the attach point were a bit more toward the center of the angle iron it may hold, but you may need to add a flat plate on the other side of the angle iron and another nut with bolt through the drive bar to hold it. I may be wrong, but the torque on that nut at the side of the angle iron may be too much and it will shear the nut from the angle. Don't have dimensions, so if the driven angle is only 8" long or so, and the angle is 2" X 2" or less it may be fine. Can't wait to hear how it works. Ron ------------------------------------------------------------------------------ This is the beast in the barrel. It is long enough that the three legs will not spin. It is not bolted to the barrel. The shaft goes through metal brackets that are on the outside. These brackets hold the shaft bushings and will support the motor. The blades are keyed to the shaft with bolts so that they can be removed if I ever need to work on the mixer. The alternative would have been to weld them in place, making it really hard to repair. If things go right I'll have this running tomorrow. I'll take more photos in the daylight after I get the motor running, and post a report on how it makes pulp. The original description said McCain's would mix a barrel full in two minutes flat!!! If this one is even close to that, I think I'll make short work of the triangles for the underground dome. spaceman No virus found in this message. Checked by AVG - www.avg.com Version: 2012.0.2221 / Virus Database: 2441/5303 - Release Date: 10/01/12 ------------------------------------ Yahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/papercreters/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/papercreters/join (Yahoo! ID required) <*> To change settings via email: papercreters-digest@yahoogroups.com papercreters-fullfeatured@yahoogroups.com <*> To unsubscribe from this group, send an email to: papercreters-unsubscribe@yahoogroups.com <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/ ----- No virus found in this message. Checked by AVG - www.avg.com Version: 2013.0.2677 / Virus Database: 2591/5806 - Release Date: 10/02/12

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