Aussie Lapidary Forum

General Category => General Discussion => Topic started by: Glen edge on September 07, 2021, 12:46:56 PM

Title: LEVEL GIRDLE ISSUE
Post by: Glen edge on September 07, 2021, 12:46:56 PM

Hi all. I have a Halls MK3 machine and seem to have trouble when time to level my crown girdle.
 i have to cheat heaps to get it level before taking it down to my girdle thickness.
Anyone got some ideas why its so far out all the time?

Title: Re: LEVEL GIRDLE ISSUE
Post by: MakkyBrown on September 07, 2021, 01:22:11 PM

Hello Glen,
An out of alignment transfer is the main cause of this.
Solutions
-Zero your cheater fine adjustment. Cut a square at 90degrees and see if it transfers perfectly, if not adjust your fine adjustment and note the zero point. Half the amount you adjusted.
-You can polish your girdle after transferring that way you will notice if the transfer has caused misalignment.
-I recommend using a transfer block as this bi-passes some machine inaccuracy.
-Check the groves on your transfer jig are clean and no lumps of glue etc.
-Put your dop against a straight edge and see if straight.
Cheers
MB
Transfer block like this:
(https://aussielapidaryforum.com/forum/gallery/9/medium_5704-220319195644.jpeg) (https://aussielapidaryforum.com/forum/index.php?action=gallery;sa=view;id=9053)

Title: Re: LEVEL GIRDLE ISSUE
Post by: Glen edge on September 07, 2021, 01:32:46 PM

ty .
i have 2 double transfer jigs.
will check the alignment of these.

Title: Re: LEVEL GIRDLE ISSUE
Post by: Pro-oz on September 07, 2021, 04:08:09 PM

I have a Hall's MK3 was having the same issue until i worked out it was my transfer jig, it is out big time I mean by almost one full turn on the cheater.
I found which one of the two adapters was out put a smaller pin and used an .008 shim to rotate the alignment pin around, this got it very close with a bit of fine adjustment. Until in the middle of a job the little pin broke and shim fell out, so put it back with the original pin. I know how far it's out so work with that now. Or cut a witness mark, all my crown girdles are good now.

So for now just working around it. I like Makky's idea. maybe one day will look at that.

Cheers
Pro-oz

Title: Re: LEVEL GIRDLE ISSUE
Post by: Glen edge on September 08, 2021, 06:59:39 AM

my jigs are different. how do i attach a pic?

Title: Re: LEVEL GIRDLE ISSUE
Post by: RoughCreations on September 09, 2021, 10:05:15 AM

Quote from: Glen edge on September 08, 2021, 06:59:39 AM

my jigs are different. how do i attach a pic?

The posts in the following thread explain including pictures well:
https://aussielapidaryforum.com/forum/index.php?topic=4671.0

RC