MAP modification to EERF/GIB grinder

[silver_pilate]

This thread is being linked from a thread over on the sale page. Michael Kanter asked if I could post these pictures for him of some modification made to the Grinder-In-A-Box so that it would work with his MAP arm.

The following pictures are MICHAEL's concept modifications to the grinder design, but he is also working on a modification/add-on to the design currently being produced.

--nathan

 

[polarbearforge]

Michael, looks good. Is the motor supposed to be attached to the baseplate? It looks like there is a space there.

Jamie

 

[adammichael]

There is a space. I added 1" to the main verticle plate because I believe It will be more stable if I bolt the base to a 1" spacer bar and the verticle plate to the same 1" spacer bar. ( if you look at the bottom view and the side view you can see the screws) In order to do this I will need to add spacers under the motor so I have clearence for the spacer bar. It also gives me the option to use a 182 and 184 frame motor in addition to the 56, 143T and 145T motor. (i cant use the spacer bar method with the 182 and 184 frame motors)

Michael

 

[12345678910]

It's nice to see this made to work with the MAP arm, as I suspected, not that difficult to do.
I felt that PB jumped the gun a bit offering that kit.
(yes it's good and serviceable, but the upcoming revisions will be better, more useful and flexible.)


Your curvy support legs are more complex than I would have conceived, but it's the same part cut 2x with one reversed from the other ...innovative.
Does it nest well with the other parts in the layout to reduce scrap production?


Does this make the main plate higher too, so the capacitor housing on the motor misses the MAP arm, or just rotated the motor to miss the cap?

Edited to add:
I added 1" to the main vertical plate
I guess this means yes..is it enough to clear a cap housing?

I think it needed that extra height anyway, from the photos I saw, the tooling arm was extended too far.


Nice work making it more flexible on motor compatibility, 56C motors are common,
but it's nice to have more options when motor shopping, opening up the used motor availability.
do they all have the same bolt pattern ?

I noticed that you didn't use Polarbear's method of slot and tab construction.
I thought that was a rather good idea, which made it more intuitive on assembly and would simplify lining up the parts.
Especially on the tracking assembly to the arm, engineer a good alignment into it and avoid complaints about bad tracking from those who have assembled it crooked.

and

why not make the baseplate a simple rectangle by removing the scalloped cutouts at the front,
reducing machine cutting time and costs while keeping weight in the base?
ist that just aesthetic styling, or is there a reason ?

 

[adammichael]

depending on the size of the housing it should miss it. I got a stainless 2hp motor on Ebay for $100 and thats whats shown in the model. That motor has the cap on the side so its not an issue.

Michael

 

[12345678910]

There is a space. I added 1" to the main verticle plate because I believe It will be more stable if I bolt the base to a 1" spacer bar and the verticle plate to the same 1" spacer bar. ( if you look at the bottom view and the side view you can see the screws) In order to do this I will need to add spacers under the motor so I have clearence for the spacer bar. It also gives me the option to use a 182 and 184 frame motor in addition to the 56, 143T and 145T motor.

(i cant use the spacer bar method with the 182 and 184 frame motors)

Michael

What if you just moved that bar over to the contact wheel side?

it looks as if there is clearance

or just offer additional holes on that side for both options?
-yes people could do that for themselves, but it won't occur to everyone unless you provide for it.

 

[12345678910]

depending on the size of the housing it should miss it. I got a stainless 2hp motor on Ebay for $100 and thats whats shown in the model.
That motor has the cap on the side so its not an issue.

Michael

It's true that it's not an issue for that motor, but I would sure check it against others so your MAP arm fits, as that's the whole reason for these modifications right?

 

[polarbearforge]

It's nice to see this made to work with the MAP arm, as I suspected, not that difficult to do.
I felt that PB jumped the gun a bit offering that kit.
(yes it's good and serviceable, but the upcoming revisions will be better, more useful and flexible.)

I don't think that I jumped the gun at all. I most likely won't be offering this particular style as a kit. When I started selling this kit, I had one restriction, that it be able to be shipped in a flat rate box. I would need to verify that it will fit in a flat rate box and be under 70 pounds(therefore $10.20 anywhere in the US). If it doesn't, then shipping would be actual shipping and a handling charge would have to be added.

There are additional pieces that will make the MAP arm functional with the grinder in a box without changing the grinder, and that's probably the avenue I'll go.

Will the kit evolve? Most certainly. Will it become better? Absolutely. Should I have waited until it was "perfect"? Nope. Perfect is a theoretical concept, and then kit would never have been released.

Jamie

 

[12345678910]

I

There are additional pieces that will make the MAP arm functional with the grinder in a box without changing the grinder, and that's probably the avenue I'll go.

Will the kit evolve? Most certainly. Will it become better? Absolutely. Should I have waited until it was "perfect"? Nope. Perfect is a theoretical concept, and then kit would never have been released.

Jamie

Maybe, but perhaps if you had included it in your design back when it was suggested while you were still in the concept phases before the kit was released, you wouldn't have to deal with this other competitive product now?

Now you are playing catchup in something you could have more easily done earlier...

If you do make the change I will be glad to see it, and again; I do applaud your slot and tab feature for alignment.

 

[adammichael]

It's true that it's not an issue for that motor, but I would sure check it against others so your MAP arm fits, as that's the whole reason for these modifications right?

As I said, This is designed to meet my needs, Im not concerned if this cant be used with other motors. I built in the amount of flexability that I need. I found the motor I wanted while I was designing it and It will work for me that way it is.
As far as Jamie's version of this grinder, I am very impressed with it. I am a mechanical designer/engineer and i can tell you it is a very well thought out, well designed unit. Slot and tab constuction is used in many areas of manufacturing and it is a great idea to use it on this grinder. I dont feel this was rushed in anyway. This isnt a case of playing catch up. Catch up to what? There is no stock grinder or kit grinder available anywhere that has provision for a MAP Arm built into it. With the small modification of 1 part currently used in the GIB you will be able to use the MAP Arm.
If Jamie decides to sell this piece as an option or incorporate this into the existing piece for the future Im good with it either way.

Great job Jamie and thank for even considering the MAP Arm in your design of this grinder

 

[adammichael]

It's true that it's not an issue for that motor, but I would sure check it against others so your MAP arm fits, as that's the whole reason for these modifications right?

No, thats not the reason for these modificatioins.

Just so there is no confusion....
Im not offering this version of the grinder for sale. I plan on having one of these lasered for my own personal use. Im not concerned about this fitting in a flate rate box or if it is less than 70 pounds. Im also not concerned about the few extra inches of lasering thats going into this.

Again, this version is not for sale, These are mods that I made so I could use my MAP Arm on my home made grinder. I think it looks cool, thats why the base looks the way it does, thats why all the other parts are shaped the way they are. Thats also why I'll probably change a few other parts before I have it lasered. You suggested removing the scallop to reduce cost and add weight to the base. Lasers dont care what shape they cut, 100" of laser cut is 100" of laser cut. It can be straight or curved. Also, there is no reason to add weight to the base, the base gets bolted to the bench. Its unsafe to use the grinder if it isnt bolted down.

Im also not suggesting that Jamie make any of these changes to his existing grinder. Other than maybe changing the shape of 1 part to accomidate the MAP Arm and thats only if Jamie wants to make that change.

Regardles of what he decides, the GIB is a great grinder and everyone should buy one.

I hope the intent of posting these pics is clear now

 

[12345678910]

With the small modification of 1 part currently used in the GIB you will be able to use the MAP Arm.

Can you be specific? Which part are you referring to then ?

The additional height on the main plate,

or the support leg piece, or just the additional spacers, shims and side plates?


If you are not offering these for sale, would you consider posting all the drawings, as have been for the origional EERF design?

 

[HowellCutlery]

I like Jamie's GIB and think it is well worth it. I don't think he jumped the gin or has to play catch up. Like Michael asked, catch up to who? These are Michael's modifications for his own grinder that he was kind enough to share with us. I love the versatility of the MAP and just wanted to see what I could do to make it compatible with my GIB.

Thanks to every one who has patiently answered my questions and worked on this project.

Keith

 

[HowellCutlery]

"Jumped the gun" not "gin". I don't know what Jamie's liquor of choice would be nor why he would be jumping over it. Dang iPhone.

 

[blindhogg]

Adammichael
Slick looking grinder, Very art nouveau look. Its got great lines, I would not change a thing.
Ensure you post or shoot me a photo after you build it.
Would love to see finished shots.
Chris

 

[SCMknives]

I think its awesome that this grinder came together, and I hope everyone shares their modifications and adaptations as freely as Michael. I do however agree, that the gun was not jumped. Perfection is unobtainable, however improvements are never ending.