Re: [Emc-users] custom_G42 rs274

2020-04-26 Thread David Berndt
Is this for lathe or? What's the use case? -Dave On Sun, 26 Apr 2020 16:42:03 -0400, andy pugh wrote: On Sun, 26 Apr 2020 at 20:56, nkp wrote: I want the interpreter to handle the compensation path, like this: https://imgur.com/xs9e3BJ So you want it to over-cut in slots where the

Re: [Emc-users] custom_G42 rs274

2020-04-26 Thread andy pugh
On Sun, 26 Apr 2020 at 20:56, nkp wrote: > > I want the interpreter to handle the compensation path, like this: > > https://imgur.com/xs9e3BJ So you want it to over-cut in slots where the tool won't fit? -- atp "A motorcycle is a bicycle with a pandemonium attachment and is designed for the

Re: [Emc-users] Encoder reset on homing to index

2020-04-26 Thread David Berndt
Actually, this got me thinking a bit, the table is hard to yank around and get real results. But we can actually measure the spring in the system, if we have something rigid enough to push against. Stick a spring of known lb/in between your table and the frame or some other ill advised and

[Emc-users] custom_G42 rs274

2020-04-26 Thread nkp
I want the interpreter to handle the compensation path, like this: https://imgur.com/xs9e3BJ https://imgur.com/Zo5pvHR I'll try to change for myself convert_straight(), convert_straight_comp1() , convert_straight_comp2() Maybe someone similar already did ?

Re: [Emc-users] Non-circular boring. Linuxcnc style.

2020-04-26 Thread Sam Sokolik
the new encoder seems to work good :) On Tue, Apr 21, 2020 at 9:53 PM Jon Elson wrote: > On 04/21/2020 09:11 PM, Sam Sokolik wrote: > > Just the way the path was generated... Didn't try that hard. Acad -> > ace > > converter for simple stuff like this. (Or by hand) > > > > > I have a bunch

Re: [Emc-users] Encoder reset on homing to index

2020-04-26 Thread David Berndt
There's about .0015-.002" of backlash and an .0005" spring in the system at reasonably force levels at the highest points of stiction on the ways. I'm sure I could get more spring out of the system if I run an endmill into the vise, but we're not really testing that here. Ballscrews,

[Emc-users] Encoder reset on homing to index

2020-04-26 Thread Roland Jollivet
No-one has mentioned the mechanics of the system.. (or have they?) What is the mechanical coupling like between the stepper and the linear scale. Obviously it's most susceptible to backlash and belt stretch. If the stepper is holding fast, how much linear deviation can you get if you try move the

Re: [Emc-users] Encoder reset on homing to index

2020-04-26 Thread dave engvall
Not that I know much about this but: It is my understanding that the rotary because it has less quantatization error does a better job on control but unless your machine is very tight a poorer job on position. Early on I tried my machine with a 5 um linear glass scale. It was very difficult to

Re: [Emc-users] Encoder reset on homing to index

2020-04-26 Thread Peter C. Wallace
On Sun, 26 Apr 2020, David Berndt wrote: Date: Sun, 26 Apr 2020 01:56:05 -0400 From: David Berndt To: Peter C. Wallace Cc: "Enhanced Machine Controller (EMC)" Subject: Re: [Emc-users] Encoder reset on homing to index The rotary loop works fine by itself. The linear loop, as it's just an I