Todays Project - What did you do today?

[Sunset Machine]

Guessing:  It looks like the end of the cutter has made full contact, causing chatter. Not enough relief, the endmill has slipped in a collet, or there's a lot of flex in the mill. The full circle here is saying something:

[Dr Stan]

I agree with Sunset. A couple of fixes to consider are 1) sandblast prior to HT and 2) skim with a fly cutter or HS end mill. Sandblasting is commonly used in mold making as the first step to polish cavities.

[Highpower]

(12-21-2015, 11:03 AM)Sunset Machine Wrote: Guessing:  It looks like the end of the cutter has made full contact, causing chatter. Not enough relief, the endmill has slipped in a collet, or there's a lot of flex in the mill. The full circle here is saying something:

Yes, the inserts basically sit flat against the work. I tried drilling through a thin piece of steel when I first got the cutter and stopped because of all the racket it made. http://www.metalworkingfun.com/thread-28...l#pid48450

The inserts definitely sit at different heights and the outer one does most all the cutting as far as I can tell. I'm thinking it's probably a combination of the mill slipping in the collet, and the Chinese cast iron made from noodles in my mill.

If a skim cut with HSS doesn't smooth things over, the next stop will be the blast cabinet.

[RobWilson]

Well another parcel arrived today ,a component tester .





I welded all the joints as per instructions . 




I added the fly leads , Works a charm









There are three pads to test  SMD ,and it has a few other features to explore, not bad for  £13  shipped . 


Rob 

[DaveH]

Wow that's a fancy bit of kit for 13 BP
 
DaveH

[RobWilson]

Hi Dave 

Not exactly high end ,just a bit of fun    here it be putting out a PWM to the £15 scope I built .







Rob

[DaveH]

I think they are great, I was going to ask 'what are you going to build' but thought better of it  
 
Dave

[RobWilson]

Very hush hush Dave  classified  

I am just trying to get a better understanding of electronics ,the kits are cheap ,fun to build and even more fun to trouble shoot when they don't work    and I dont care it I fry one as I would just build another .   


And they could be useful.


Rob

[DaveH]

(12-21-2015, 02:24 PM)RobWilson. Wrote: Very hush hush Dave  classified  

Rob

  I knew I shouldn't have asked

DaveH

[Highpower]

You do manage to find some cool stuff Rob.

Had me scratching my head for a minute though. I thought there was an error on your display.

But then I remembered that NPN means "Not Pointing iN"..... so you are good to go.