From: none@none.com99   
      
   On 6/28/2025 3:30 PM, Snag wrote:   
   > On 6/28/2025 4:46 PM, Bob La Londe wrote:   
   >> On 6/28/2025 2:19 PM, Jim Wilkins wrote:   
   >>> "Bob La Londe"  wrote in message news:103pkof$12a0h$1@dont-email.me...   
   >>>   
   >>> Another trick if you are using HSS, or if you are very careful using   
   >>> *carbide is to use a precision dowel pin, gage pin, shank of an end   
   >>> mill, 123 block, gage block, etc.  Start with your cutter slightly less   
   >>> than your precision dimension fromt he stock, and slowly move it until   
   >>> your gage just slides between.  This is "maybe" more accurate than   
   >>> paper, but I treat it the same since the preload of the lead screws is   
   >>> in the opposite direction.   
   >>>   
   >>> I prefer an edge finder, a tool height setter, and pre-measured tool   
   >>> heights, but you never know what kind of situation you may find yourself   
   >>> in.   
   >>>   
   >>> * If using a sharp carbide cutter you have to take a lot of care to make   
   >>> sure you do not chip a cutting edge using the slip gage method.   
   >>> Bob La Londe   
   >>> -----------------------------------   
   >>>   
   >>> Good advice.   
   >>>   
   >>> I use the items you mentioned and drill shanks as spacers to set the   
   >>> lathe and mill stops for depth of cut when the tool contacts the   
   >>> original surface if caliper jaws won't fit. Like hobby machines, my   
   >>> 1960's antiques don't have DROs.   
   >>>   
   >>   
   >>   
   >> Plenty of "hobby" machines do have DROs.  Just ask anybody who is   
   >> using a high price "pro" machine that belongs to their boss's bank.   
   >> LOL  They will tell you all those import machines are hobby junk.   
   >>   
   >> DROs are fairly cheap, and available for almost anything these days,   
   >> but many of the "better" prosumer/hobby importers offer preinstalled   
   >> DROs as an option.   
   >>   
   >> There are even modestly priced DROs with bluetooth interface for a   
   >> tablet or maybe a cell phone.  I'm not sure there.  I like my DRO   
   >> hanging off of a big heavy steel arm.   
   >>   
   >>   
   >   
   >   I recently upgraded from a Shumatech DRO350 to a real DRO with optical   
   > scales instead of capacitive on my bench top mill  . It hangs from a   
   > modestly sized piece of steel square tube . I briefly considered putting   
   > the Shumatech unit on my lathe but saw no particular advantage for doing   
   > so .   
      
      
   See my comment to Jim below.   
      
   --   
   Bob La Londe   
   CNC Molds N Stuff   
      
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