[Coco] [coco] Coco CNC

[George Ramsower]

I'm wondering..

 In Nitros9, Runb, is the math much faster?

George
----- Original Message ----- 
From: "George Ramsower"

> From: "Gene Heskett"
>
>> On Saturday 09 February 2008, George Ramsower wrote:
>>>I did my first fully automated CNC machining this morning. I finished
>>>cutting the groove for the X axis lead screw into the X axis table. It
>>>worked but with a problem with (I think) the Dremmel. Twice, the end mill
>>>began dropping down into the part..slowly.
>>
>> I've had several occasions where a bit would ever so slowly walk out of 
>> the
>> dremel's collet.  They could stand to have a better tightening mechanism.
>>
>>>However, I don't think it is
>>>moving inside the chuck. I think perhaps the dremmel is moving in the 
>>>clamps
>>>I made, since they are simply pressed onto the dremmel. It might be also 
>>>the
>>>output shaft on the dremmel that is moving. I'll have to look into this. 
>>>It
>>>didn't hurt anything as I'm only making room for the lead screw and 
>>>nothing
>>>is supposed to come in contact with this groove. It only makes room for 
>>>the
>>>screw.
>>> But this issue will need to be dealt with before actually trying to make
>>>parts.
>
> I was thinking of taking the chuck off of it and putting a collet on to 
> see if that may help. But as I thought on it, I realized that it would not 
> then be able to reach the slot I'm working on. The chuck does extend the 
> length of the dremmel.  Other than that, this machine worked as well as I 
> expected. The only weak point is the dremmel, as I knew this when I began 
> this project. This is why I said in an earlier post that the dremmel may 
> become only the drive motor for a new mill head. The work I did with it on 
> the lead screw slot turned out pretty good.
> The side to side milling had issues, because the Z axis was extended far 
> beyond safe limits because it was actally milling below the slide surface, 
> which in turn began 1/4 inch below the designed work surface. So flexing 
> in the whole affair is considerable. I'll have to go really slow and make 
> small cuts to make the pocket for the lead nut.
> When the Z axis began to fall, I discovered that the machine can cut a lot 
> deeper and with more tool pressure than I thought it could do. It actually 
> made a pretty decent looking cut. Hmmmm.
> The B09 program is working quite well. However, I do need to get the thing 
> to use an external file to tell it what to do. This would reduce the 
> amount of disk space used quite a bit. I expect once the thing is totally 
> working as intended, the program itself may push the limits of the 
> available memory for the window. Passing params to smaller processes  are 
> an option, but right now, I'm avoiding it. Even keypresses halt the 
> process and this short halt can be seen in the part while the machine is 
> cutting.
> I need to create a new boot disk to take advantage of the no-halt 
> controller I have in this coco. I've just been lazy on that.
> I have a 6309 and have been thinking of installing it and converting to 
> Nitros9 on this machine. It's a darned site easier than doing it on the 
> other coco.
>
> George
>
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