Project: Tow mechanism

[HZM]

After completing my test cut on the sherline, I am ready to do my first project, Tow release mechanism. Was so anxious about it that I cant wait for Eric for the drawing. Created a CAD drawing from the pics he sent me



Anyone game to try to generate the G code? I can forward the dwg/dxf to u

Cheers

Mike <br> <br>

[Warbird]

THE MAN !!!!!

[pilot_bear]

by making 2 pc then join them will be a better option both for cost and ease of job. the 2 pc can easily join later, bolt and nut maybe

<br> <br>

[overtki11]

[Chuck]

For the actual photo, the piece that looks like wings seems to be protruding out from the elongated piece at the bottom. The one in the 3D drawing seems to be flushed at the bottom... or is my eyes playing tricks on me?

Mike, since u have the CAD drawing in BobCAD, can't the G-Code be generated from BobCAD? Anyway, I can try to generated the G-Code for MACH3.

I'm still new to this, so my G-Code may not be the best, you might want to get a few to contribute & post them on the forum... so newbie like me can benefit from their experience as well .

[genexis]

Can you post the dimensions? Maybe i try to do it... but i'll want to draw it out myself on solidworks. Easier for me to see how to convert to G code.

[HZM]

yup, from the pic, definitely a 2 pc assembly. I am also thinking of machining the flange and SQ rod separately. In terms of production and function, shouldnt make any diff.

By doing all from a block, I am wondering if I can do all action in 1 go

I just tried using my bobcad cam to generate 3D toolpath and get like 65000 lines and somemore some error.

I attached the dwg file for you guys who is interested. I will scale down the size a little as it looks too big compare to the one in the pics

Now going back to do a simulation

Cheers

Mike <br> <br>

[HZM]

This thing getting a little addictive

Generated a toolpath. But I doubt I will want to do it 3D machining, will combine 2D, 2.5D and 3D This should be the fastest

Cheers

Mike <br> <br>

[Chuck]

I've manage to create the 3D model by importing the DWG provided (I assume that the original dimensions are correct). The first images shows the 3D model.

The part will be machined in 2 pass. First rough pass using a 3mm end mill and the second finish pass also using the same end email so that tool change is not necessary.

To keep the G-Code to a minimum, I only perform the finishing pass to the top of the part where the rounded corners are.

The 2nd and 3rd images are the result of the first and second pass respectively. The red colour indicates area that requires more work (but its quite close already).

The final G-Code is 5075 lines.

[Chuck]

Sorry forgot to attached the images <br> <br>

[HZM]

hey chuck, 5000+ lines seems low sia. What is the depth per pass? I tried 0,5mm on delrin and thats about there liao. anymore deeper probably break the cutter

I decide on 2 pc machining. Just to much to mill off if I insisted on milling from a solid block. I cannot figure out watching my mill reducing 10mm width of the block on both side to obtain the flange

Now I am sourcing for raw rectangular rod. See which size fits the nearest. Btw, there is no dimension, I jus base on the photo and agar agar.

Looks good from yr side

Cheers

Mike

[Chuck]

The depth of cut for the 1st pass was 0.5mm and the second pass for the rounded corners was 0.1mm.

Can't do the actual machining as I broke my Sherline couplers. Have to wait to place an order with your before I can even think of touching my machine

Hope its soon

[BloodClod]

Very interesting project HZM... my question is how this will be clamped during the milling? Looks like you'll need to re-position at least once?

[HZM]

I had a good thought to it while I am away in Thailand I mean the machining / clamping method .....

Most practical way - 2 pc assembly

If still insist on 1 single block, I intend to machine the 2 short surface first. Then clamp using the sherline 3551 vise with 2 pc of wood / machining plastic in between the machined surface. In this way, my cnc program can run without having to machine that 2 surface in contact w the vise and probably complete them in 1 action.

Will stay working on the G code now

Cheers

Mike

[HZM]

Went w 2 pc assembly.

Machined the base plate today <br> <br>