Re: [Emc-users] Acceleration question.

2024-02-23 Thread John Dammeyer
Gosh this was almost 2 years ago. Don't even remember why I was asking. John > -Original Message- > From: Chris Albertson [mailto:albertson.ch...@gmail.com] > Sent: February 23, 2024 10:30 AM > To: Enhanced Machine Controller (EMC) > Subject: Re: [Emc-users] A

Re: [Emc-users] Acceleration question.

2024-02-23 Thread Chris Albertson
otor > being run by one of Jon's pwm-servos. Both solutions would need far less > electrical power to get the job done than a steeper could do. >>> -Original Message- >>> From: gene heskett [mailto:ghesk...@shentel.net] >>> Sent: June-16-22 6:34 PM >

Re: [Emc-users] Acceleration question.

2024-02-23 Thread gene heskett
ists.sourceforge.net Subject: Re: [Emc-users] Acceleration question. On 6/16/22 20:54, John Dammeyer wrote: OK. I realize this will be a dumb question but please bear with me especially since I've included the ability to accelerate in my Electronic Lead Screw project. A friend and I were discus

Re: [Emc-users] Acceleration question.

2022-06-17 Thread andy pugh
On Fri, 17 Jun 2022 at 18:02, Chris Albertson wrote: 1) Model the flywheel in CAD, and get the moment of inertia that way (make sure you look at the right one, which will depend on the orientation that you modelled it at) 2) Calculate how much energy is in the flywheel at target speed. E = 1/2 I

Re: [Emc-users] Acceleration question.

2022-06-17 Thread Chris Albertson
...@gmail.com] > Sent: June-16-22 10:29 PM > To: Enhanced Machine Controller (EMC) > Subject: Re: [Emc-users] Acceleration question. > > OK, here is the problem. > > 1) we can not know the distance from the mass to the center of the wheel. > Mass is always distributed, It al

Re: [Emc-users] Acceleration question.

2022-06-17 Thread John Dammeyer
> From: Chris Albertson [mailto:albertson.ch...@gmail.com] > Sent: June-16-22 10:29 PM > To: Enhanced Machine Controller (EMC) > Subject: Re: [Emc-users] Acceleration question. > > OK, here is the problem. > > 1) we can not know the distance from the mass to the

Re: [Emc-users] Acceleration question.

2022-06-16 Thread John Dammeyer
> -Original Message- > From: Chris Albertson [mailto:albertson.ch...@gmail.com] > Sent: June-16-22 10:29 PM > To: Enhanced Machine Controller (EMC) > Subject: Re: [Emc-users] Acceleration question. > > OK, here is the problem. > > 1) we can not know the distance fro

Re: [Emc-users] Acceleration question.

2022-06-16 Thread Chris Albertson
onds. What size motor then? > > > > > -Original Message- > > From: Chris Albertson [mailto:albertson.ch...@gmail.com] > > Sent: June-16-22 6:56 PM > > To: Enhanced Machine Controller (EMC) > > Subject: Re: [Emc-users] Acceleration question. > > > > Knowing

Re: [Emc-users] Acceleration question.

2022-06-16 Thread gene heskett
On 6/16/22 21:57, John Dammeyer wrote: Hi Gene, Quite right. That link I posted used a table while in fact, as you pointed out, the mass is mostly on the outside of a flywheel with spokes. I would imagine at there is some average where if it's a 300 lb disk that is 24" might be the same as a

Re: [Emc-users] Acceleration question.

2022-06-16 Thread John Dammeyer
l Message- > From: Chris Albertson [mailto:albertson.ch...@gmail.com] > Sent: June-16-22 6:56 PM > To: Enhanced Machine Controller (EMC) > Subject: Re: [Emc-users] Acceleration question. > > Knowing the mass of the wheel is not enough, you need to know how far the > mas

Re: [Emc-users] Acceleration question.

2022-06-16 Thread Chris Albertson
ze 23 300 oz-in. > > Could that actually bring a flywheel up to that speed in 5 seconds? > > > -Original Message- > > From: gene heskett [mailto:ghesk...@shentel.net] > > Sent: June-16-22 6:34 PM > > To: emc-users@lists.sourceforge.net > > Subject: Re: [Emc-users] Acce

Re: [Emc-users] Acceleration question.

2022-06-16 Thread Chris Albertson
Knowing the mass of the wheel is not enough, you need to know how far the mas is from the center of rotation. They call this "Moment of inertia" There are ways of calculating this for simple wheel shapes like a plain disk but for anything else you are best off if you just measure it. The simples

Re: [Emc-users] Acceleration question.

2022-06-16 Thread John Dammeyer
t; From: gene heskett [mailto:ghesk...@shentel.net] > Sent: June-16-22 6:34 PM > To: emc-users@lists.sourceforge.net > Subject: Re: [Emc-users] Acceleration question. > > On 6/16/22 20:54, John Dammeyer wrote: > > OK. I realize this will be a dumb question but please bear with

Re: [Emc-users] Acceleration question.

2022-06-16 Thread gene heskett
On 6/16/22 21:09, John Dammeyer wrote: Addendum to this: https://www.orientalmotor.com/motor-sizing/rotaryDevice-sizing.html#QuickReport I chose a 24" disk, 5 seconds to get up to 50 RPM. That's going to work for a flat plate, but will give you a low answer with disappointing results for the c

Re: [Emc-users] Acceleration question.

2022-06-16 Thread gene heskett
On 6/16/22 20:54, John Dammeyer wrote: OK. I realize this will be a dumb question but please bear with me especially since I've included the ability to accelerate in my Electronic Lead Screw project. A friend and I were discussing bringing a 300 pound flywheel up to speed. Vz=0 RPM, Vf=50

Re: [Emc-users] Acceleration question.

2022-06-16 Thread John Dammeyer
Addendum to this: https://www.orientalmotor.com/motor-sizing/rotaryDevice-sizing.html#QuickReport I chose a 24" disk, 5 seconds to get up to 50 RPM. > -Original Message- > From: John Dammeyer [mailto:jo...@autoartisans.com] > Sent: June-16-22 5:50 PM > To: Enhanced Machine Controller (EMC