Re: [Emc-users] depth stops for R8 while making tap hats?

On Thursday 12 April 2018 14:25:53 Kenneth Lerman wrote: > Hey Gene, > > Wouldn't a square R-8 collet make things simpler? Something like this? > > I did find those on a google search quite some time back, but at $40 a copy, t

Re: [Emc-users] 7i76 spindle reverse relay

On Thu, 12 Apr 2018, Condit Alan via Emc-users wrote: Date: Thu, 12 Apr 2018 13:40:31 -0700 From: Condit Alan via Emc-users To: "Emc-users@lists.sourceforge.net" Cc: Condit Alan Subject: [Emc-users] 7i76 spindle reverse relay I tried sending this message yesterday and again today but apparen

[Emc-users] 7i76 spindle reverse relay

I tried sending this message yesterday and again today but apparently it didn’t go through. So I am trying again. I am trying to send two schematics (.png) files to help clarify my question. I am re-wiring my lathe controller box using a 5i25 & 7i76 pair from Mesanet. I am using a Potter-Brumfi

Re: [Emc-users] Monitoring coolant level

The low-tech method is a piece of clear vinyl tubing with one end connected to the bottom of the coolant tank, the other end connected to the top of the coolant tank, and the middle of the tubing routed as a vertical sight gauge on the front of the machine.  Added Bonus:  It's an analog gauge s

Re: [Emc-users] Monitoring coolant level

Andy, it sounds to me like you need to further automate the coolant refill process, with a pump and a remote bulk tank.  :-) Dave On 4/12/2018 2:37 PM, andy pugh wrote: It isn't easy to get to the coolant tank on my mill (because the tool cart is there) so I top up the coolant by pouring it

[Emc-users] Monitoring coolant level

It isn't easy to get to the coolant tank on my mill (because the tool cart is there) so I top up the coolant by pouring it in the top. It's hard to know when to stop, and also to know when it is low. So I installed one of these: https://www.amazon.co.uk/Plastic-Liquid-Sensor-Double-Floaters/dp/B01

Re: [Emc-users] depth stops for R8 while making tap hats?

Hey Gene, Wouldn't a square R-8 collet make things simpler? Something like this? Then you could just use square stock for your tap holders. (Yeah, I know it's a bit late. But the idea just came to me in the middle of last nig

Re: [Emc-users] Large servo selection

On 12 April 2018 at 13:27, Todd Zuercher wrote: > If you want to try multiple drive motors, a rack and pinion becomes a very > good option. You can make quite a nice actuator reasonably easily by using a gear on the motor spindle and a round rack running in suitable bushings. http://www.hpcgear

Re: [Emc-users] Large servo selection

Hi-lead ball screws are capable of 1m/sec (lead equal to or greater than the diameter). If you want to try multiple drive motors, a rack and pinion becomes a very good option. You can use the multiple motors to take up any backlash free of charge, simply by placing a small amount of opposed

Re: [Emc-users] Large servo selection

On 4/12/2018 6:09 AM, andy pugh wrote: On 11 April 2018 at 15:30, David Berndt wrote: I'm looking to output about 1000lbf in a linear direction via a crank/slider or ballscrew with peak speed of about 1m/s. Have you considered hydraulics? (Or possibly even pneumatics). Hydraulics can be pret

Re: [Emc-users] Large servo selection

On 11 April 2018 at 15:30, David Berndt wrote: > I'm looking to output about 1000lbf in a linear direction via a crank/slider > or ballscrew with peak speed of about 1m/s. Have you considered hydraulics? (Or possibly even pneumatics). Hydraulics can be pretty quick with a servo-valve cylinder.

Re: [Emc-users] Large servo selection

On Thursday 12 April 2018 00:38:11 Jon Elson wrote: > On 04/11/2018 01:01 AM, David Berndt wrote: > > Wondering if anyone had any preference/experience/advise > > to share with single phase capable larger servos. I'm > > looking at an application for a 3 to 5hp motor with a vfd, > > but if I could