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Re: G8689 DRO Installation

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  • davetuhy
    Thanks for the suggestions, John. It turned out that a screw holding the X beam had loosened and allowed a significant amount of movement.
    Message 1 of 14 , Jun 19, 2013
    • 0 Attachment
      Thanks for the suggestions, John. It turned out that a screw holding the X beam had loosened and allowed a significant amount of movement.

      --- In GrizHFMinimill@yahoogroups.com, Dave Tuhy <davetuhy@...> wrote:
      >
      > The issue became apparent as I was attempting to locate center in order to drill several spaced holes on a "miked"part that I had turned on the lathe.  My intent was to bolt the part on a piece of scrap in which I had drilled and tapped corresponding holes to  further machine the part.  Niether the X or Y DRO indicated the correct radius however, the Y was closer.  I placed a dial indicator against the table and after taking up the backlash, I set the dial indicator to zero, the X DRO to zero and the X handwheel dial to zero and then measured the movement of the table using all three. After determing that the DRO was off, I threaded bolts into the the holes in the scrap and measured them with a digital caliper which verified the findings I had obtained with the dial indicator. I intend to check the Y in the same way.  I think I have mounted the DRO's adequately, but I guess I'll go over it again. I'm considering using these on something
      > where I don't need tight tolerances. Don't know what that might be yet, but I'm sure something will come along.  
      >
      >
      > ________________________________
      > From: John Lindo <bechetboat@...>
      > To: "GrizHFMinimill@yahoogroups.com" <GrizHFMinimill@yahoogroups.com>
      > Sent: Wednesday, June 12, 2013 10:40 PM
      > Subject: Re: [GrizHFMinimill] Re: G8689 DRO Installation
      >
      >  
      > That is excessive inaccuracy.
      > Ensure the reader bar is rigid and parallel to the table.
      > Check and or replace  the 2 x  2032 batteries.
      > What are you using as a comparison? are you reading the hand dials ?,do you have the backlash
      > going the right way when reading the dials? the dials now become superfluous.
      >
      > Best way to check accuracy is to drill and jig bore 5 holes 1" apart in a plate,put in dowels and measure.
      > If all else fails,send back for replacements,I have Igaging and they work well.
      > John
      > Spain
      >
      >
      > >________________________________
      > >From: Dave Tuhy <sevent1c10@...>
      > >To: "GrizHFMinimill@yahoogroups.com" <grizhfminimill@yahoogroups.com>
      > >Sent: Thursday, June 13, 2013 4:02 AM
      > >Subject: RE: [GrizHFMinimill] Re: G8689 DRO Installation
      > >
      > > 
      > >I've recently completed a similar installation using iGaging Remote readouts.  I'm really disappointed with the accuracy.  The one on the X is .009 off in an inch.  Have either of you checked the accuracy of the DRO's you're using? 
      > >
      > >________________________________
      > >To: GrizHFMinimill@...: nericarmi@...: Tue, 11 Jun 2013 18:24:23 -0700Subject: Re: [GrizHFMinimill] Re: G8689 DRO Installation 
      > >here my install http://www.flickr.com/photos/73243110%40N04/9021879662/in/set-72157633879256881/
      > >On Tue, Jun 11, 2013 at 5:00 PM, a rien <amriensr@...> wrote:
      > > 
      > >>
      > >>
      > >>You're correct about the torsion spring being in the way. I had swapped over to the air spring before I did my DRO install.
      > >>
      > >>--- On Mon, 6/10/13, Dave Markowitz <davemarkowitz@...> wrote:
      > >>
      > >>
      > >>>From: Dave Markowitz <davemarkowitz@...>
      > >>>Subject: Re: [GrizHFMinimill] Re: G8689 DRO Installation
      > >>>To: GrizHFMinimill@yahoogroups.com
      > >>>Date: Monday, June 10, 2013, 9:46 PM
      > >>>
      > >>>
      > >>>The Y and Z-axis DROs are on the right side. In the pic of the Y-axis, the handwheel has been removed for access.The torsion spring on the left side of the mill's column would get in the way of the DRO scale, I think.Dave M.On 6/10/13 8:19 PM, nericarmi wrote:> just couple of qwestions> why would you install the Y dro on the left of the machine and not the right and the same with the Z it just get in the way of the jibs locks> would you be thinking of CNC it?>> --- In http://mc/compose?to=GrizHFMinimill%40yahoogroups.com, Dave Markowitz <davemarkowitz@> wrote:>> This past weekend I completed installing DROs on my Grizzly G8689 mini>> mill. I used the plans from fignoggle.com. A writeup with pictures is here:>>>> <https://sites.google.com/site/davemarkowitzsmachineshop/projects/grizzly-g8689-mill-dro>>>>> -- >> Dave Markowitz, KB3MNK>> davemarkowitz@>>>>
      >
    • Neri Carmi
      my point excactly...I got to say it I told you ... my point excactly...I got to say it I told you On Wed, Jun 19, 2013 at 5:16 AM, davetuhy
      Message 2 of 14 , Jun 19, 2013
      • 0 Attachment
        my point excactly...I got to say it "I told you"


        On Wed, Jun 19, 2013 at 5:16 AM, davetuhy <davetuhy@...> wrote:
         

        Thanks for the suggestions, John. It turned out that a screw holding the X beam had loosened and allowed a significant amount of movement.

        --- In GrizHFMinimill@yahoogroups.com, Dave Tuhy <davetuhy@...> wrote:
        >
        > The issue became apparent as I was attempting to locate center in order to drill several spaced holes on a "miked"part that I had turned on the lathe.  My intent was to bolt the part on a piece of scrap in which I had drilled and tapped corresponding holes to  further machine the part.  Niether the X or Y DRO indicated the correct radius however, the Y was closer.  I placed a dial indicator against the table and after taking up the backlash, I set the dial indicator to zero, the X DRO to zero and the X handwheel dial to zero and then measured the movement of the table using all three. After determing that the DRO was off, I threaded bolts into the the holes in the scrap and measured them with a digital caliper which verified the findings I had obtained with the dial indicator. I intend to check the Y in the same way.  I think I have mounted the DRO's adequately, but I guess I'll go over it again. I'm considering using these on something
        > where I don't need tight tolerances. Don't know what that might be yet, but I'm sure something will come along.  
        >
        >
        > ________________________________
        > From: John Lindo <bechetboat@...>


        > To: "GrizHFMinimill@yahoogroups.com" <GrizHFMinimill@yahoogroups.com>
        > Sent: Wednesday, June 12, 2013 10:40 PM
        > Subject: Re: [GrizHFMinimill] Re: G8689 DRO Installation
        >
        >  
        > That is excessive inaccuracy.
        > Ensure the reader bar is rigid and parallel to the table.
        > Check and or replace  the 2 x  2032 batteries.

        > What are you using as a comparison? are you reading the hand dials ?,do you have the backlash
        > going the right way when reading the dials? the dials now become superfluous.
        >
        > Best way to check accuracy is to drill and jig bore 5 holes 1" apart in a plate,put in dowels and measure.
        > If all else fails,send back for replacements,I have Igaging and they work well.
        > John
        > Spain
        >
        >
        > >________________________________
        > >From: Dave Tuhy <sevent1c10@...>

        > >To: "GrizHFMinimill@yahoogroups.com" <grizhfminimill@yahoogroups.com>
        > >Sent: Thursday, June 13, 2013 4:02 AM
        > >Subject: RE: [GrizHFMinimill] Re: G8689 DRO Installation
        > >
        > > 
        > >I've recently completed a similar installation using iGaging Remote readouts.  I'm really disappointed with the accuracy.  The one on the X is .009 off in an inch.  Have either of you checked the accuracy of the DRO's you're using? 
        > >
        > >________________________________
        > >To: GrizHFMinimill@...: nericarmi@...: Tue, 11 Jun 2013 18:24:23 -0700Subject: Re: [GrizHFMinimill] Re: G8689 DRO Installation 
        > >here my install http://www.flickr.com/photos/73243110%40N04/9021879662/in/set-72157633879256881/
        > >On Tue, Jun 11, 2013 at 5:00 PM, a rien <amriensr@...> wrote:
        > > 
        > >>
        > >>
        > >>You're correct about the torsion spring being in the way. I had swapped over to the air spring before I did my DRO install.
        > >>
        > >>--- On Mon, 6/10/13, Dave Markowitz <davemarkowitz@...> wrote:
        > >>
        > >>
        > >>>From: Dave Markowitz <davemarkowitz@...>
        > >>>Subject: Re: [GrizHFMinimill] Re: G8689 DRO Installation
        > >>>To: GrizHFMinimill@yahoogroups.com
        > >>>Date: Monday, June 10, 2013, 9:46 PM
        > >>>
        > >>>
        > >>>The Y and Z-axis DROs are on the right side. In the pic of the Y-axis, the handwheel has been removed for access.The torsion spring on the left side of the mill's column would get in the way of the DRO scale, I think.Dave M.On 6/10/13 8:19 PM, nericarmi wrote:> just couple of qwestions> why would you install the Y dro on the left of the machine and not the right and the same with the Z it just get in the way of the jibs locks> would you be thinking of CNC it?>> --- In http://mc/compose?to=GrizHFMinimill%40yahoogroups.com, Dave Markowitz <davemarkowitz@> wrote:>> This past weekend I completed installing DROs on my Grizzly G8689 mini>> mill. I used the plans from fignoggle.com. A writeup with pictures is here:>>>> <https://sites.google.com/site/davemarkowitzsmachineshop/projects/grizzly-g8689-mill-dro>>>>> -- >> Dave Markowitz, KB3MNK>> davemarkowitz@>>>>
        >


      • Dave Tuhy
        I ve got it coming..lol To: GrizHFMinimill@yahoogroups.com From: nericarmi@gmail.com Date: Wed, 19 Jun 2013 18:57:38 -0700 Subject: Re: [GrizHFMinimill] Re:
        Message 3 of 14 , Jun 21, 2013
        • 0 Attachment
          I've got it coming..lol
           

          To: GrizHFMinimill@yahoogroups.com
          From: nericarmi@...
          Date: Wed, 19 Jun 2013 18:57:38 -0700
          Subject: Re: [GrizHFMinimill] Re: G8689 DRO Installation

           
          my point excactly...I got to say it "I told you"


          On Wed, Jun 19, 2013 at 5:16 AM, davetuhy <davetuhy@...> wrote:
           

          Thanks for the suggestions, John. It turned out that a screw holding the X beam had loosened and allowed a significant amount of movement.

          --- In GrizHFMinimill@yahoogroups.com, Dave Tuhy <davetuhy@...> wrote:
          >
          > The issue became apparent as I was attempting to locate center in order to drill several spaced holes on a "miked"part that I had turned on the lathe.  My intent was to bolt the part on a piece of scrap in which I had drilled and tapped corresponding holes to  further machine the part.  Niether the X or Y DRO indicated the correct radius however, the Y was closer.  I placed a dial indicator against the table and after taking up the backlash, I set the dial indicator to zero, the X DRO to zero and the X handwheel dial to zero and then measured the movement of the table using all three. After determing that the DRO was off, I threaded bolts into the the holes in the scrap and measured them with a digital caliper which verified the findings I had obtained with the dial indicator. I intend to check the Y in the same way.  I think I have mounted the DRO's adequately, but I guess I'll go over it again. I'm considering using these on something
          > where I don't need tight tolerances. Don't know what that might be yet, but I'm sure something will come along.  
          >
          >
          > ________________________________
          > From: John Lindo <bechetboat@...>


          > To: "GrizHFMinimill@yahoogroups.com" <GrizHFMinimill@yahoogroups.com>
          > Sent: Wednesday, June 12, 2013 10:40 PM
          > Subject: Re: [GrizHFMinimill] Re: G8689 DRO Installation
          >
          >  
          > That is excessive inaccuracy.
          > Ensure the reader bar is rigid and parallel to the table.
          > Check and or replace  the 2 x  2032 batteries.

          > What are you using as a comparison? are you reading the hand dials ?,do you have the backlash
          > going the right way when reading the dials? the dials now become superfluous.
          >
          > Best way to check accuracy is to drill and jig bore 5 holes 1" apart in a plate,put in dowels and measure.
          > If all else fails,send back for replacements,I have Igaging and they work well.
          > John
          > Spain
          >
          >
          > >________________________________
          > >From: Dave Tuhy <sevent1c10@...>

          > >To: "GrizHFMinimill@yahoogroups.com" <grizhfminimill@yahoogroups.com>
          > >Sent: Thursday, June 13, 2013 4:02 AM
          > >Subject: RE: [GrizHFMinimill] Re: G8689 DRO Installation
          > >
          > > 
          > >I've recently completed a similar installation using iGaging Remote readouts.  I'm really disappointed with the accuracy.  The one on the X is .009 off in an inch.  Have either of you checked the accuracy of the DRO's you're using? 
          > >
          > >________________________________
          > >To: GrizHFMinimill@...: nericarmi@...: Tue, 11 Jun 2013 18:24:23 -0700Subject: Re: [GrizHFMinimill] Re: G8689 DRO Installation 
          > >here my install http://www.flickr.com/photos/73243110%40N04/9021879662/in/set-72157633879256881/
          > >On Tue, Jun 11, 2013 at 5:00 PM, a rien <amriensr@...> wrote:
          > > 
          > >>
          > >>
          > >>You're correct about the torsion spring being in the way. I had swapped over to the air spring before I did my DRO install.
          > >>
          > >>--- On Mon, 6/10/13, Dave Markowitz <davemarkowitz@...> wrote:
          > >>
          > >>
          > >>>From: Dave Markowitz <davemarkowitz@...>
          > >>>Subject: Re: [GrizHFMinimill] Re: G8689 DRO Installation
          > >>>To: GrizHFMinimill@yahoogroups.com
          > >>>Date: Monday, June 10, 2013, 9:46 PM
          > >>>
          > >>>
          > >>>The Y and Z-axis DROs are on the right side. In the pic of the Y-axis, the handwheel has been removed for access.The torsion spring on the left side of the mill's column would get in the way of the DRO scale, I think.Dave M.On 6/10/13 8:19 PM, nericarmi wrote:> just couple of qwestions> why would you install the Y dro on the left of the machine and not the right and the same with the Z it just get in the way of the jibs locks> would you be thinking of CNC it?>> --- In http://mc/compose?to=GrizHFMinimill%40yahoogroups.com, Dave Markowitz <davemarkowitz@> wrote:>> This past weekend I completed installing DROs on my Grizzly G8689 mini>> mill. I used the plans from fignoggle.com. A writeup with pictures is here:>>>> <https://sites.google.com/site/davemarkowitzsmachineshop/projects/grizzly-g8689-mill-dro>>>>> -- >> Dave Markowitz, KB3MNK>> davemarkowitz@>>>>
          >




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