Re: [Emc-users] Leadscrew Efficiency?

On Friday 19 August 2016 07:05:30 andy pugh wrote: > On 19 August 2016 at 05:38, Gene Heskett wrote: > > Interesting, link? > > http://linuxcnc.org/docs/2.7/html/man/man9/pid.9.html So it/they is/are. I never noticed them before, yet the manpage carries a 2007 date so its

Re: [Emc-users] Leadscrew Efficiency?

On 19 August 2016 at 05:38, Gene Heskett wrote: > Interesting, link? http://linuxcnc.org/docs/2.7/html/man/man9/pid.9.html -- atp "A motorcycle is a bicycle with a pandemonium attachment and is designed for the especial use of mechanical geniuses, daredevils and

Re: [Emc-users] Leadscrew Efficiency?

rs@lists.sourceforge.net > Sent: Thursday, August 18, 2016 5:04:09 PM > Subject: Re: [Emc-users] Leadscrew Efficiency? > > On Thursday 18 August 2016 11:16:02 Todd Zuercher wrote: > > They are both almost identical screws and nuts except for their > > leads. They are

Re: [Emc-users] Leadscrew Efficiency?

aller and smaller until the I induced overshooting was minimized. - Original Message - From: "Gene Heskett" <ghesk...@shentel.net> To: emc-users@lists.sourceforge.net Sent: Thursday, August 18, 2016 5:04:09 PM Subject: Re: [Emc-users] Leadscrew Efficiency? On Thursday 18 Augu

Re: [Emc-users] Leadscrew Efficiency?

;jmkasun...@fastmail.fm> > To: emc-users@lists.sourceforge.net > Sent: Thursday, August 18, 2016 10:50:59 AM > Subject: Re: [Emc-users] Leadscrew Efficiency? > > Are they LEADscrews or BALLscrews? > > With ballscrews, the finer pitch screw should indeed provide a much > better mech

Re: [Emc-users] Leadscrew Efficiency?

A 10 TPI would require half the torque, but double the speed. I would expect a servo to have a reduction gear. If it had an exceptionally high reduction, it may not be able to produce sufficient torque at the higher RPM needed. But that doesn't sound like the case. Danny John Kasunich

Re: [Emc-users] Leadscrew Efficiency?

On Thursday 18 August 2016 10:14:53 Todd Zuercher wrote: > I have a machine that I converted from step-motors to servos, and I'm > having a little trouble with the Z axis. It has an anti backlash lead > screw with a 5tpi screw. This sort of worked, but the servo was > working hard to move the

Re: [Emc-users] Leadscrew Efficiency?

18, 2016 10:50:59 AM Subject: Re: [Emc-users] Leadscrew Efficiency? Are they LEADscrews or BALLscrews? With ballscrews, the finer pitch screw should indeed provide a much better mechanical advantage. With leadscrews, the mechanical advantage almost doesn't matter, because friction is by f

Re: [Emc-users] Leadscrew Efficiency?

- Original Message - From: "Jim Craig" <jimcraig5...@windstream.net> To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net> Sent: Thursday, August 18, 2016 10:37:02 AM Subject: Re: [Emc-users] Leadscrew Efficiency? On 8/18/2016 9:14 A

Re: [Emc-users] Leadscrew Efficiency?

Are they LEADscrews or BALLscrews? With ballscrews, the finer pitch screw should indeed provide a much better mechanical advantage. With leadscrews, the mechanical advantage almost doesn't matter, because friction is by far the dominant force. Somewhere between 60% and 95% of the torque

Re: [Emc-users] Leadscrew Efficiency?

On 8/18/2016 9:14 AM, Todd Zuercher wrote: > I have a machine that I converted from step-motors to servos, and I'm having > a little trouble with the Z axis. It has an anti backlash lead screw with a > 5tpi screw. This sort of worked, but the servo was working hard to move the > head, and I

[Emc-users] Leadscrew Efficiency?

I have a machine that I converted from step-motors to servos, and I'm having a little trouble with the Z axis. It has an anti backlash lead screw with a 5tpi screw. This sort of worked, but the servo was working hard to move the head, and I wanted a little higher encoder resolution for better