Re: [CAD_CAM_EDM_DRO] Advice needed?.

Mark,

The numbers sound OK. 300 oz/in should be enough. I have used 350 oz/in on
my gantry.

Check your acceleration values. If you try and accelerate too fast it will
cause the stepper motors to stall.

Like Fred said, check you power supply.

What type drives are you using?

Bob Campbell

www.campbelldesigns.com

----- Original Message -----
From: "rmtuckeruk" <rmtucker@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Sunday, August 18, 2002 12:14 PM
Subject: [CAD_CAM_EDM_DRO] Advice needed?.


> Help!!!!.
> I am in the process of building and designing a gantry type
> mill/router.It macines approx 1500mm*1000mm*300mm.
> I am using leadscrews (16mm dia * 4mm pitch),with phospher bronze
> anti backlash nuts.These are driven from a 300oz stepper motor
> through a timing belt on 1:1 pulleys.
> I am currently only achieving 0.8"/sec max feed before the motor
> stalls.
> How can i improve this?.
> I am looking at new motors which are 700oz.
> If i detatch the belt the motors will actually run up to 3"/sec
> before stalling,so would i achieve anything by gearing down maybe 2:1
> to increase torque so increase speed.Or would ballscrews etc be the
> best bet.
> I would like to hear from anybody that has built or is building
> something similar.
>
> thanx
> mark
>
>
>
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