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  • #23108
    paul rayner
    Participant
      @paulrayner36054

      magnetic or glass

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      #141864
      paul rayner
      Participant
        @paulrayner36054

        hello

        I'm thinking of up grading my senior m1 mill and my ford ml7 with dro's

        i think I'm going to go with machine dro's sds6 style readout

        but unsure about which encoders to get weather glass or magnetic

        I understand that the magnetic ones are a lot slimmer and take up less room they are also ip 67 rated which is good

        any thoughts or comments good or bad would be appreciated as I know very little about this subject other than what I've read on this site and the net in general

        may I also add they will be used for model engineering only (hopefully) and i do sometimes use pumped cutting fluid

        many thanks in advance for any replies

        Paul

        #141865
        The Merry Miller
        Participant
          @themerrymiller

          Evening Paul,

          I converted my Senior M1 a while back.

          If you look at my photo album on the conversion you might get some ideas.

          I used Allendale (Machine -DRO) glass scales and adapted the machine to suit.

          Len. P.

          #141867
          paul rayner
          Participant
            @paulrayner36054

            hi Len

            thanks for that

            I see you seem to have the covers as well.

            my senior has the knuckle head so i will probably be getting a 3 axis one

            I will have to mount it on the knee somehow but theres plenty of room and i will be able to use it when horizontal milling (although i never done any yet)

            which readout do you use? had any problems with it?

            many thanks

            Paul

            #141870
            Gray62
            Participant
              @gray62

              Hi Paul

              I have the magnetic read heads on the cross slide and compound of my gh1330 lathe and have been very happy with them, a lot more compact than glass scales and well suited to the application. I used a glass scale for the carriage travel as there is plenty of room at the rear of the bed. Not sure what mounting brackets they have available now by I ended up making my own to suit.

              #141887
              The Merry Miller
              Participant
                @themerrymiller

                Morning Paul,

                Below is the link to the two axis display I have installed, again from Allendale.

                Also you will notice on the vertical head the DRO device is one of their caliper style readouts suitably modified.

                I have added an LED book light just in front to enhance the display.

                http://www.machine-dro.co.uk/digital-readout-systems-dro-pc-magnetic-glass-linear-scales/sds6-2v-universal-display-console-2-axis-display.html

                Len. P.

                #141890
                OuBallie
                Participant
                  @ouballie

                  Len. P.

                  LED lamp with tripod.

                  Would appreciate details of how you attached it to said tripod please?

                  Geoff – Drawer organising turn for the better, after grey matter decided to co-operate for once!

                  #141892
                  Douglas Johnston
                  Participant
                    @douglasjohnston98463

                    I have had two magnetic and two glass scales in use for over a year and both types perform very well. The magnetic ones take up less space but are probably more vulnerable to swarf damage, which is why I installed one under the cross slide of my lathe (some pictures in my album ). If space is not a problem I would go for glass scales and perhaps magnetic for the Z axis of a mill where swarf is less of a problem. You can mix glass and magnetic on the same machine.

                    Doug

                    #141902
                    The Merry Miller
                    Participant
                      @themerrymiller

                      Geoff,

                      I don't know where the LED lamp with tripod came from but I've just added an album showing the attachment of my lamp setup for the vertical DRO.

                      Paul,

                      I've had no problems at all with the display.

                      Len,

                      #141930
                      paul rayner
                      Participant
                        @paulrayner36054

                        thanks for the replys guys

                        Len: thats the readout I'm considering for my lathe

                        im considering a 3 axis one for the mill or a couple of those box of tricks that lets you plug the encoders into my laptop

                        Doug: you mention that the magnetic ones are more prone to swarf damage , which I'm surprised at because the sated IP rating on them is IP67 which for light fittings is very good

                        Regards Paul

                        #141932
                        peter allen 1
                        Participant
                          @peterallen1

                          I bought the Allendale kit for my Tom Senior some time ago but have not yet had the confidence to install it. I wanted to keep the functionality of stops and power feed trip and have not worked out how to do this.

                          Merry millers photos very encouraging to me although I cannot quite see from the photo if your stops and power feed lever are operational. Is that a special feed lever?

                          Is there anything that you would do differently?

                          Did you by any chance keep details of the dimensions of the brackets?

                          #141933
                          The Merry Miller
                          Participant
                            @themerrymiller

                            Peter.

                            I carried out the mods to ensure I didn't lose any of the functionality so yes power feed is still operational and the stops are still working and fully adjustable.

                            I had to machine part of each stop to ensure they didn't clout the spacers that the X axis scale is fitted to.

                            Tomorrow , if I have time, I will take some more pictures and annotate where necessary with dimensions.

                            Len.

                            #141935
                            Anonymous
                              Posted by paul rayner on 28/01/2014 21:02:45

                              Doug: you mention that the magnetic ones are more prone to swarf damage , which I'm surprised at because the sated IP rating on them is IP67 which for light fittings is very good

                              It is probably a case of knowing how to 'interpret' the specification. A rating of IP67 implies submersion to a depth of 1 metre. Looking at the pictures on the Machine-DRO website it looks like the read head is sealed and would survive submersion. Likewise I assume that the functioning of the magnetic strip is probably unaffected by submersion in water, even though it does not look sealed. However, it might be possible for it to be affected by swarf, particularly ferrous. Technically it probably shouldn't then have an IP67 rating, but it sounds good in the marketing blurb. I enquired about the Machine-DRO magnetic strips some years ago at the Midland show, and decided against them as they were not guaranteed to be immune to swarf and coolant.

                              Regards,

                              Andrew

                              #141943
                              paul rayner
                              Participant
                                @paulrayner36054

                                hi Andrew

                                thanks for your reply, its got me thinking

                                I think you are probably right in saying that its just the actual reading head that is IP rated as i can't see how the magnetic strip can be dust proof as even if theres some sort of sealing strip there will still be a slight opening however small where the head protrudes out of the scale.

                                "decided against them as they were not guaranteed to be immune to swarf and coolant."

                                does this mean that the glass ones are less likely to be troublesome?

                                thanks

                                Paul

                                #141955
                                Steamgeek
                                Participant
                                  @steamgeek

                                  I have glass scales on my mill, and they have been trouble free.

                                  I did add a small bead of sealant between the protective cover and the front of the milling table for the x axis, as that looked like an obvious place for trouble.

                                  Not that it makes any difference but I fiited the slim line scales.

                                  #141966
                                  Gray62
                                  Participant
                                    @gray62

                                    I've not had any problems with swarf ingress or fouling on the magnetic reader strips, the magnetic strip is fitted into an aluminium housing, covered with a close fitting stainless steel strip retained with two rubber sealing strips. A dab of silicone sealant each end of the housing ensures nothing gets in that way. I also put a strip of aluminium angle over the top of the reader to prevent dwarf dropping g down between the read head and the scale.

                                    I'll try and remember to put some photos on later today.

                                    Edited By CoalBurner on 29/01/2014 10:36:44

                                    #142022
                                    Douglas Johnston
                                    Participant
                                      @douglasjohnston98463

                                      Paul, the only concern I have with the magnetic scale is swarf getting trapped between the reading head and the cover over the magnetic strip.It is not a problem I have experienced, but then again both my magnetic scales are in quite well protected areas. I would not be happy with a magnetic scale down the side of a lathe cross slide for example.

                                      Doug

                                      #142077
                                      paul rayner
                                      Participant
                                        @paulrayner36054

                                        Hi guys

                                        thanks for all the replys

                                        John- thats some serious kit you have got there!

                                        coal burner- that would be great if you can post some pics

                                        my dilemma is the cross slide on the ML7, If bush them out so i can get to the gib strip screws via angled screwdriver and spanner i won't be able to access the carriage lock and visa versa, this is why i was thinking about the magnetic ones as they are quite a bit smaller. the tom senior M1 mill is no problem whatever i go for as theres loads of room.

                                        if anybody's got any pics of there Myford cross slide DRO I would be really greatfull .

                                        Paul

                                        #142087
                                        Gone Away
                                        Participant
                                          @goneaway
                                          Posted by paul rayner on 29/01/2014 21:28:25:

                                          if anybody's got any pics of there Myford cross slide DRO I would be really greatfull .

                                           

                                          There's an article on this site here if you haven't seen it.

                                          (Edit) Oh, BTW, click on the pics in that article to get much larger versions that you can save if you want.

                                          Edited By OMG on 29/01/2014 23:01:52

                                          #142165
                                          OuBallie
                                          Participant
                                            @ouballie

                                            Thanks Len.

                                            Those lamps look as if they are battery powered as I can't see a power cord.

                                            Geoff – Drawer organising at a standstill again crying

                                            #142222
                                            paul rayner
                                            Participant
                                              @paulrayner36054

                                              Hi guys

                                              thanks again for the replys

                                              Bogstandard2 yes I did see the link and to be honest its a bit daunting for me doing that sort of work , Im ok drilling and tapping a couple of holes but any more than that on the cross slide I'm not confident enough.

                                              OMG I did see the article you mentioned and its the best alternative I've seen so far, although you would have to remove the read head etc to adjust the gibs, it would only be four fasteners though and easy enough to remove

                                              any way thanks to all those who have posted, Its all been good advice and nice to see how others have got round problems Gives you food for thought. I think I've made my mind up now and I will chew it over a couple of days before I part with the hard earned readys (that will be the hardest bit)

                                              many thanks to all again

                                              regards

                                              Paul

                                              #142291
                                              Gray62
                                              Participant
                                                @gray62

                                                A few pics of the dro's on my gh1330

                                                img_0085.jpg

                                                img_0086.jpg

                                                img_0087.jpg

                                                Edited By CoalBurner on 31/01/2014 12:45:52

                                                #142307
                                                Mick Dobson
                                                Participant
                                                  @mickdobson

                                                  dsc00601.jpgdsc00600.jpgHere's another take on installing a cross slide DRO to a GH1330 lathe. (Actually it's not a Warco, but a 1997 spec Chester of the same type, when they were painted green and before they started selling the grey paint spec machines. Has been a good machine.)

                                                  My method has the DRO situated beyond the end of the cross slide. It enables the tailstock to still be moved right up to the back of the saddle, also it keeps the DRO working parts well away from swarf and coolant.

                                                  The long plate extension screwed to the top of the cross slide supports the DRO scale, which effectively moves with the cross slide. The DRO pick up comprising the wiring lead is fixed to a bracket projecting from the back of the saddle. It has proved to be a highly effective and very rigid set up.

                                                  The only downside is that I had to move the lathe slightly further away from the wall and also modify the rear splash guard to suit.

                                                  For issues on lathes where the cross slide gib adjustment screws would be compromised, situating the DRO at the end like this would solve that problem too.

                                                  On the saddle DRO, mine too is at the back, like that shown on Coalburner's lathe. I added a further swarf guard above the DRO body as a second line of defence, although the DRO seal strip is at the underside anyway so should be fine.dsc00597.jpg

                                                  Regards, Mick

                                                  #142308
                                                  The Merry Miller
                                                  Participant
                                                    @themerrymiller

                                                    Geoff,

                                                    Sorry for nor replying sooner about the lamps on my mill.

                                                    The ones fitted either side of the vertical head are 20w 12v halogen with flexible necks, clamp type base and obviously their own PSU's.

                                                    Homebase were having a sale sometime last year and I bought four for £6 each.

                                                    Len.

                                                    #142344
                                                    paul rayner
                                                    Participant
                                                      @paulrayner36054

                                                      Mick

                                                      thats a good idea for the cross slide

                                                      I will have a think about that one

                                                      thankyou

                                                      Paul

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