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Servo motors move smoother.
Servo motors can go faster.
Servo motors are not as noisy.
Servo motors have position feedback and will fault and stop if position is lost or an obstruction is ran...

I have been eyeing the TinyG and Gshield myself. I have ported my firmware to the Arduino Due so that with the Gshield looks like a fun project.

Dennis
Super Tech & Associates

The motor shaft diameter can be an issue if they do not match between the 3040 and the motors you buy.

Could be both ends or but usually one end if doing the work.

Take pictures and show us what the ends look like.

The thrust bearing is not doing what it should. Sounds like a washer is missing...

There has to be something that holds the lead screw from moving axially.

Dennis
Super Tech & Associates

Servo motors are always playing catchup or wait it's ahead.
The P is for proportionally how far off it is.
The I is a sum of the P's over Time.
The D is a reverse of P over time hence it dampens...

The thunk sound when the motors are running is caused by a interrupt in the host operating system, it is why signal generators work better.

The axis motor velocity is controlled by the step pulse rate created by Mach4 which is determined by the feed rate and the vector of the movement.
The actual positioning of the motor shaft is done...

A driver for each motor is a good plan.

The next consideration is calibration or homing the machine to switches.

My solution was to know when the machine was homing when a limit switch was...

The current ratings are not that specific. When you smell hot varnish coming from the motor and you can't touch the motor the current is too high.

If you over drive a motor with too much current...

I use CorelDraw to make raised letters signs a lot because of the different fonts.

Dennis
Super Tech & Associates Main Web Home Page


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How To Relief Engrave Letters in Aluminum Plate

I think the noxious fumes on some materials could poison you. I like the idea myself though even with that said.

The laser diodes might do the job for you. I have seen videos of people taking...

When the driver is enabled it should hold the motor in place. When it is not, you should be able to get the shaft to move with your fingers.

This is the first step.

Did you ever get your table running?

If it is an open loop motion then it must be stepper motors with driver modules.

If that is the case it might not be very expensive to update the control system.

Trace the motor cables back to...

I have a program that directly works with HPGL files.

SuperCamXp Graphical Machine Control Program via USB

How many motors do you have on the machine?

The program works through the USB port...

First thought messed up encoder signals. First idea particles on the encoder disc giving bad signals.

Gently blow out position encoder.

Physically follow the encoder signal cable from the...

Skate board bearings have been used before. Old motor shaft bearings can be useful.

I would consider using plastic skids made empty plastic bottles.

Turning the square tubing on it's side can...

Milling foam can create high static charges that can discharge with an arcing voltage.

I have seen ion generators placed in the work chamber of machines to reduce the static charges.

You can draw and create Gcode or import DXF and HPGL files to create Gcode files with the Demo Version of SuperCamXp.

This is a link to the demo download.
SuperCamXp Demonstation Download

This...

I made three little g-code programs to test with.

The stepper motors I have have flats on them so I positioned it at zero with flats up.

The first I moved the Z axis back and forth a quarter...

260054

I wonder if this is the board you are using. Kind of sounds like it from your description.

I have found the optical Isolation circuit won't pass step signals reliably beyond 8000 steps...

Do some research on Arduino's. There are some projects and boards that may do what you need to be done.

You cannot make a serial port a parallel port by software.

You need a parallel port card or another computer with a parallel printer port.

When you use a serial interface it adds another level of complexity.

With Serial you need a microprocessor to make the step signals.

That adds firmware writing tasks and how fast or slow the...

Parallel Port interface is the easiest to make and design.

Awesome drawings.

I think the steel tubing is strong enough but warps and may not be flat enough surfaces. This leads to binding.

I think the strength of the gantry across the back is weak....

Polarity of the step pulse sometimes makes a difference with some controllers.

It does not make a difference which coil you deem A or B.
If it does not spin the direction you expect, reverse the wires on one of the coils at the connector and it will spin in the opposite...

If the polarity is different the motor will turn in the wrong direction.
Reverse one coil pair wires and it will turn in the opposite direction.