Re: [Emc-users] Ball Screw Driving Questions

2023-12-25 Thread John Dammeyer
There is no reason you cannot used a toothed belt and pulley at the other end. As long as the lead screw backlash is taken out somehow. On my Gingery Lathe I have two ball thrust bearings on either side of the lead screw bushing taking out the backlash. At the tail stock end a toothed

Re: [Emc-users] Ball Screw Driving Questions

2023-12-25 Thread Linden
Thanks Chris This is exactly the insight I was looking for now I understand why the conventional mounting is always with the servo at the head stock end. Linden On 2023-12-25 22:35, Chris Albertson wrote: When it comes to flexing and bending, think about the bed too. If the servo motor

Re: [Emc-users] Ball Screw Driving Questions

2023-12-25 Thread Linden
On 2023-12-25 21:56, gene heskett wrote: On 12/25/23 19:05, Linden via Emc-users wrote: Hello All, In the early stages of converting a 13 x 24 inch manual Chinese lathe to run with Linux CNC. I have 2 questions regarding replacing the Z axis lead screw with a 3205 ball screw:   

Re: [Emc-users] Ball Screw Driving Questions

2023-12-25 Thread Chris Albertson
When it comes to flexing and bending, think about the bed too. If the servo motor and pullies are mounted at the tailstock end, then the bed will carry the reaction forces and see exactly the same tension and “twist” force as the screw. But if the motor is mounted at the headstock end the bed

Re: [Emc-users] Ball Screw Driving Questions

2023-12-25 Thread Linden via Emc-users
Thank you Leonardo,  That makes me feel better 2 to 1 reduction will fit easily in the space available. I should have been a bit more clear both ends of the Z axis ball screw will be supported by ball bearings in pillow blocks. The head stock end will have two bearings back to back with a

Re: [Emc-users] Ball Screw Driving Questions

2023-12-25 Thread gene heskett
On 12/25/23 19:05, Linden via Emc-users wrote: Hello All,     In the early stages of converting a 13 x 24 inch manual Chinese lathe to run with Linux CNC. I have 2 questions regarding replacing the Z axis lead screw with a 3205 ball screw:  What I am thinking is mounting the fixed end

Re: [Emc-users] Ball Screw Driving Questions

2023-12-25 Thread Thaddeus Waldner
Machines often have both ends fixed and the assembly preloaded by applying tension to the screw. > On Dec 25, 2023, at 7:03 PM, Leonardo Marsaglia wrote: > > Hello Linden, > > For your first question. I would mount the motor on a fixed end just to be > sure, so that would lead you to make

Re: [Emc-users] LinuxCNC 2.9.2 is released

2023-12-25 Thread John Dammeyer
Is there going to be a MicroSD image for The Pi4? > -Original Message- > From: andy pugh [mailto:bodge...@gmail.com] > Sent: December 25, 2023 6:15 PM > To: Enhanced Machine Controller (EMC) > Subject: [Emc-users] LinuxCNC 2.9.2 is released > > LinuxCNC 2.9.2 has been released. This is a

[Emc-users] LinuxCNC 2.9.2 is released

2023-12-25 Thread andy pugh
LinuxCNC 2.9.2 has been released. This is a bugfix release, with the most obvious change being that run-from-line in the Axis interface should now be working again. Packages have been prepared for: Buster - uspace - amd64 (PC) armhf (Pi) arm64 (Pi with 64-bit kernels) Buster - RTAI - amd64

Re: [Emc-users] Ball Screw Driving Questions

2023-12-25 Thread Leonardo Marsaglia
Hello Linden, For your first question. I would mount the motor on a fixed end just to be sure, so that would lead you to make both ends fixed. I guess you can mount your servo on a non fixed end if the machine is not going to be used for heavy cuts on hard materials but I would go the extra

[Emc-users] Ball Screw Driving Questions

2023-12-25 Thread Linden via Emc-users
Hello All,     In the early stages of converting a 13 x 24 inch manual Chinese lathe to run with Linux CNC. I have 2 questions regarding replacing the Z axis lead screw with a 3205 ball screw:  What I am thinking is mounting the fixed end in a pillow block at the head stock end of the