Hi...just reading this thread.. and I am currently sitting up my Sherline for threading via an encoder......will let you know how will it does here in the near...
I haven't ever seen a comparison in accuracy between screw-cut threads and die-cut threads, but it wold be interesting to see. One thing about using the lathe...
Victor, To figure out on a cnc lathe what dimensions and feed rates to use, you first get out your trusty Machinists handbook or look on the internet to find...
Of course, you will also need to make sure that either: 1) your threading tool has the proper "flat" tip for the pitch of threads you are cutting or 2) 2) You...
Yea, I was afraid someone would say that. Victor ... From: juangelt To: SherlineCNC@yahoogroups.com Sent: Tuesday, May 31, 2005 8:55 PM Subject: [SherlineCNC]...
Sean, Fantastic explanation, yes I did dig out my Machinists handbook this morning and came up with the same minor dias as you. The RPM's and feedrate was...
Hi Victor & Sean, ... Having just gone through this I think it's not quite right. All of the references I could find show the minor diameter as the diameter of...
Andy Wander, Justin Hirsch, Russ Waters, Juan Gelt, W Thomas and Sean from RS Machine, thanks for all of your input. I am going to have to purchase the proper...
Hi Victor, ... RPM is SLOW. For my 4mm x 0.7 (which is around 36 tpi) I was able to use 300 RPM. For courser threads you need to go slower. As for feed rates,...
Dave, Yes I believe you are right on this, especially if I were to do this with a very sharp single point tool. I am going to tuck this away in my archive for...
Dave Hylands, Yep your right, I'm going to start planning the project right now. Spindle encoder and such and software. In the meantime I'll have to resort...
Hi Juan, Actually, single point turning on a lathe can be excellent! Threads can be much more accurate then a die. Perfectly square clean threads. The trick...
here's what i was wondering one chooses a lathe when one does work in the round because it naturally has infinite resolution on the rotation. via cnc on a mill...
Hi Juan, ... Except that there's momentum on your side. Even though you're sending discrete steps to the stepper motors, what you're actually getting is a...
Hi Juan, I believe TurboCNC is using a single pulse encoder (typically a photo interrupter). I'd like to use more CPRs, or use a servo drive for the spindle...
Hi Alan and ALL: One problem of the single point pick up on the spindle is it would limit you to single pitch threads. You would need two pick ups a 180 deg....
I can cut multiple-start threads(I think that's what you meant :)) with Mach2 and a single point pickup on the spindle. Andy Wander Verrex Corporation ... ...
Hi Bill, ... To cut a multi-start thread, all you're really doing is cutting two threads side by side. Even with CNC is takes multiple passes to cut a single...
Hi Bill, Good point! Or use TWO cutters at once!? I want to implement threading in my controller program as well, and I'm thinking of using many CPR (If I...
... handbook this morning and came up with the same minor dias as you. The RPM's and feedrate was what was causing me some confusion, I'm easily confused. I...
Fred, Thanks for the links. Victor ... From: Fred Smith To: SherlineCNC@yahoogroups.com Sent: Wednesday, June 01, 2005 5:32 PM Subject: [SherlineCNC] Re: Help...
from deskcnc threading thread: Lathe threading is now working with DeskCNC. The basic setup is as follows: 1) Quadrature encoder with index, attached to the...
Thanks Dave: I was getting my manual lathe operation mixed up with the CNC work. You are not able to do it with the manual lathe because you have the compound...
Hi everyone I'm helping a friend convert his new mill over to CNC. It's pre drilled to accept stepper brackets. I have a CNC BP clone and I offered to make...
Hi Juan, ... Here's my spindle encoder, along with the thread I created using it. http://www.DaveHylands.com/Machinist/CNC-Spindle-Encoder/ -- Dave Hylands ...
Hi Dave, Nice Job! Looks like I'd better get busy! I've got a tach with the same sensor, I think I can tap into it. Wish I had two tachs! Alan KM6VV...
Hi Doug, Actually, I seem to remember the idea from perhaps a year ago. Hi Mariss! 1, 2, and 3 really don't matter much. Even 'tho I like all the pins I can ...
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