Re: [Emc-users] Internal threading using external G76 tool path (back-tool lathe)

2018-01-14 Thread Tom Easterday
> On Jan 13, 2018, at 6:47 PM, andy pugh wrote: > >> On 14 January 2018 at 00:27, wrote: >> >> But, as can be seen in the image below, the various retraction paths (in >> blue) are not along a single driveline. Why is that? > > > I believe that this is to that every pass is the same shape,

Re: [Emc-users] Internal threading using external G76 tool path (back-tool lathe)

2018-01-14 Thread Gene Heskett
On Sunday 14 January 2018 12:23:51 Tom Easterday wrote: > > On Jan 13, 2018, at 6:47 PM, andy pugh wrote: > >> On 14 January 2018 at 00:27, wrote: > >> > >> But, as can be seen in the image below, the various retraction > >> paths (in blue) are not along a single driveline. Why is that? > > > >

Re: [Emc-users] Internal threading using external G76 tool path (back-tool lathe)

2018-01-14 Thread Jon Elson
On 01/14/2018 11:39 AM, Gene Heskett wrote: On Sunday 14 January 2018 12:23:51 Tom Easterday wrote: On Jan 13, 2018, at 6:47 PM, andy pugh wrote: On 14 January 2018 at 00:27, wrote: But, as can be seen in the image below, the various retraction paths (in blue) are not along a single driveli

Re: [Emc-users] Chinese collet chucks [Was: Re: Internal threading using external G76 tool path (back-tool lathe)

2018-01-14 Thread Les Newell
I bought some Chinese BT30 and BT40 ER32 collet chucks off eBay a while back and was pleasantly surprised by how accurate they were. The finish looked good on all surfaces. I bought one before buying the rest and measured the bore when fitted in the spindle. My tenths dial gauge hardly moved. W

Re: [Emc-users] Chinese collet chucks [Was: Re: Internal threading using external G76 tool path (back-tool lathe)

2018-01-14 Thread Marcus Bowman
On 14 Jan 2018, at 19:44, Les Newell wrote: > I bought some Chinese BT30 and BT40 ER32 collet chucks off eBay a while back > and was pleasantly surprised by how accurate they were. The finish looked > good on all surfaces. I bought one before buying the rest and measured the > bore when fitted

Re: [Emc-users] Chinese collet chucks [Was: Re: Internal threading using external G76 tool path (back-tool lathe)

2018-01-14 Thread Chris Albertson
If you buy the collets on eBay and you measure them, if they are out of spec you can return them as "not as described" and then seller is obligated to pay for the return postage. You will get a prepaid shipping label. Many times sellers don't want to pay to return ship a bad part, after all what

Re: [Emc-users] Chinese collet chucks [Was: Re: Internal threading using external G76 tool path (back-tool lathe)

2018-01-14 Thread Gene Heskett
On Sunday 14 January 2018 17:10:05 Chris Albertson wrote: > If you buy the collets on eBay and you measure them, if they are out > of spec you can return them as "not as described" and then seller is > obligated to pay for the return postage. You will get a prepaid > shipping label. Many times se