Re: [CAD_CAM_EDM_DRO] Re: need a transformer

Jessie,

No you do not need to give up.

Please tell us a little more about the machine that you have built or
upgraded.

The choice of gears and screws is very important.

Some of us will help. I can find you a good transformer at a good price.

Part of it may be in the tuning section of Mach3.

If you are using Mach3 there are a number of great tutorials that you can
download and review.

Bob Campbell
Bob Campbell Designs
www.Campbelldesigns.com
Mach 2/3 breakout boards
Relay boards
Spindle Speed boards
Stepper motors
Plasma Torch Height control

----- Original Message -----
From: "rebel307" <rebel307@...>
To: <CAD_CAM_EDM_DRO@yahoogroups.com>
Sent: Monday, June 12, 2006 12:50 PM
Subject: [CAD_CAM_EDM_DRO] Re: need a transformer


> Thanks to the 3 who replied.
> I am useing basically an isolation tranformer then I got a variac for the
> power supply. I have been told over and over to get rid of the variac and
> get a "real" transformer. Art of mach software told me that himself.
> Mariss of gecko told me that. They both also said to get a transformer
> that will output the current rated for all 3 steppers put togather and add
> a tad bit more for a 4th axis.
> I am useing 1200oz/in steppers for X&Y and one 1780oz/in for the Z. All
> of them came from homeshopcnc.com. the 1200s require 6amp, the 1780
> requires 6.2amp. You are saying use less amps, I put smaller resistors on
> the gecko to see if it would work with less amps, made the problem worse.
> I took the resistors out, didnt help so I put the values in to give me the
> motors rated current. Cap in the power supply is a 80,000MFD the caps on
> the drives are 470uF as gecko said. I am not an electronics expert, dont
> claim to be but I know that my machine isnt working and nothing anybody
> has said as helped other then get a real transformer.
> The problem, the motors insted of moving when a program tells them to
> move lock up. Its actually ok while jogging around, throw a program in and
> all hell breaks loose, they stall constantly. Make a rapid feed more then
> 30IPM on X&Y and more then 10IPM on the Z and your asking for it. I am
> beginning to think I should sell off the control and just go back the
> reliable way,,, manual.
> Jessie
>
> [Non-text portions of this message have been removed]
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