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    Circles have flats

    Hi all, I didn’t get a chance to have a look at the machine until this weekend so il give an update. Hi carbidebob. I have heard of diamond square circle and did do it when setting up the machine that’s what showed the flats on circles when I first tried to set it up. I did another square...
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    Circles have flats

    Hi all, a bit of an update. I hand a go at trying to adjust the gains manually but with out the software it’s very tricky. I also adjusted arc tolerance settings in the UNCNC software that controls the machine. I have include a pic of how it is cutting now. There is an improvement but still some...
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    Circles have flats

    No, from what I have read it’s a17bit encoder, off the top of my head I think it’s 136000
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    Circles have flats

    Hi all, Thanks for all the reply’s and help. I have t had much of a chance this week to get at the machine. I had a quick look at it last night, I did a small manual change on two gains and kept bringing them up slightly until I felt the vibration was gone. When I did this I was getting...
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    Circles have flats

    10mm is the pitch. And I have the servo set to 10000 steps
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    Circles have flats

    Hi, thanks for all the replies, I had another look at the machine too see if I could find anything. Everything seems tight and no play found. Rigidity could be a possibility although I will look into this again. I ran a simple circle program to see if I could see anything happening, I put the...
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    Circles have flats

    Sorry, the pic is after a contour Finnish pass
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    Circles have flats

    I have attached the contour pass
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    Circles have flats

    Rouging pass
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    Circles have flats

    Looks like I’m doing G3,
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    Circles have flats

    Hi all thanks for the reply’s. As far as I can tell there is no or very little backlash, I did do a finishing contour finishing cut with .4mm. I have attached the start of the G code I used
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    Circles have flats

    Hi all, looking for a bit of help here. I have a diy cnc mill, when I’m trying to cnc round posts I’m getting lots of visible flats that are making up the round post. I’m using fusion 360 and I tried both adaptive clearing and pocket to cut out the test pieces. I have attached some images of...
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    Digimatic micrometer head for lathe

    The cross slide on the lathe has some uneven wear, I would have to send it to Switzerland or Germany to get it repaired. I use the lathe for making watch parts when I’m turning down past 1mm I can see the effects of the slide moving in and out. I was going to make a new slide with linear...
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    Digimatic micrometer head for lathe

    Hi. I am looking to make a lathe cross slide for very small work. Max diameter 10mm on steel and 25mm on brass. Max movement in the cross slide will be 30mm. I plan to use small linear rails. I was thinking instead of a lead screw I could use a digimatic micrometer like the one in this link...
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    380V 3 phase motor on 220v 3 phase

    Hi all Looking for some help on a motor i have bought. on the name plate there is only one voltage for 380v Its a two speed motor and has both delta and wye symbols. Can I run this motor on a 3 phase 220v VFD. Would i lose much power if it can be done. I don't need to run it at the two speeds...
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    Lorch LLN 10mm lathe

    Hi Tim Thanks for the reply, yes both chucks have back plates. I am going to price what it would cost to get two plates made up.
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    Lorch LLN 10mm lathe

    Hi All Looking for a bit of help on a lorch lathe I recently acquired. The spindle head that came with the lathe had a lot of runout 2.5 thou, and a tight spot when turning by hand. I got another spindle head for the lathe that has a runout of about .0003 inches, but now the chucks I have for...
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