Posted by Janicholson on January 23, 2018 at 09:20:35 from (199.17.6.91):
In Reply to: Machining Question posted by Fritz Maurer on January 23, 2018 at 08:23:12:
With a rotary table and the disk centered on the table, put a scribe in the collet and position the apparent center under the quill close to the visual center. Just touching the disk, rotate the table. This makes a circle with the scribe. move the table to make a smaller circle until there is only a point. Now the Y coordinate and X coordinate are zeroed. Reset the DRO to X0 Y0 move the table X+ to the radius of the bolt circle and mark the hole position and note the DRO readings. Rotate the table the correct # of degrees and mark holes Repeat as needed to set the pattern. Check using an existing plate to assure intention and drill. Jim
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Today's Featured Article - Grain Threshing in the Early 40's - by Jerry D. Coleman. How many of you can sit there and say that you have plowed with a mule? Well I would say not many, but maybe a few. This story is about the day my Grandfather Brown (true name) decided along with my parents to purchase a new Ford tractor. It wasn't really new except to us. The year was about 1967 and my father found a good used Ford 601 tractor to use on the farm instead of "Bob", our old mule. Now my grandfather had had this mule since the mid 40's and he was getting some age on him. S
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