Search:

Hi Shorton. :) The RPM display on the SuperPID itself if extremely accurate, it is crystal referenced and I wrote and tested the RPM algorithm myself so it is accurate to <50 parts per million....

Thanks everyone for helping with the tech questions during my absence. :)

Hi Inkling, re your circuit it is complex and does not show the terminal numbers so I can't check all parts of it.

The...

Thanks everyone for helping with tech support here. :)

I'm still having a lot of problems with the new forum engine, it's crashing my browsers and even when I can turn enough Java things off to...

Then I think he would be breaching copyright and intellectual property laws!

The SuperPID has a lot of proprietary features like using a paint (or white/black area) and opto sensor, bargraph on...

Personally I would not be happy with 0.002" repeatability when the hall type home switches will give close to 0.0005" repeatability or 5 times the accuracy.

However if that suits your needs then...

I use hall-effect home switches on X and Y, which allow homing of the machine very accurately, and even do that at different times to "trim out" thermal expansion of the machine.

There's a thread...

Ultrasonic is very poor on something fluffy or energy absorbent, I think it would not work well.

I remember a similar thread somewere and someone suggested a simple light bulb type source on one...

Hi, the second test looks correct as the voltage on the "out" pin should be high when NO magnet is there, and low when the magnet South pole is present.

I'm not sure what you mean by "diodes on...

Many of the new hybrid motors have a strong fixed axial bearing (the front bearing). Replacing the motors with modern motors designed for axial loads should fix your problem.

That old slo-syn...

I have some older commercial stepper drivers where the instructions recommend adding a 2200-4400uF cap on the driver's power terminals.

Generally this helps because the stepper driver is some...

Ahh yeah they are scanners, I thought at first they were printers.

I understand the fun and rewards from making cool stuff out of junked equipment.

I also do that for fun sometimes. :)

Nice result there in the PC case! :)

For someone who is "not a programmer" you seem to be doing a very good job of it Gerry! ;)

Mind you I've seen trained "programmers" who could not build a nice application like yours to save their...

By my calcs I get full wave rectified 120v AC across a series resistor 22k and about 6 volts of diodes, that would be approx 114v on the 22k resistor or 5.18mA through the resistor.

However the...

That sounds hot, hotter than I would personally want for EG.

However EG is >80% granite and granite is a pretty good heat conductor and has a lot of thermal mass.

The only parts putting heat...

Such a gentle bend with a really large radius like that should be no problem. Probably a sheet metal roller (like the ones with 3 rollers) is ideal for adding such a gentle curve. A car body shop...

Generally that's right but there are still advantages to stainless bolts. I rebuild old Harleys for fun and I only stock stainless steel bolts, as I live somewhere hot with high humidity and things...

Congratulations! :) You have obviously put a lot of hours of hard work into that machine even though it is a bit rough looking.

Good work too making use of recycled linear rails and belt drives...

Thanks Devastator for the info on the cable. :)



The clarity of the scrolled text depends largely on how fast the LCD material pixels can change state from on to off, and that depends mainly on...

That's a beautiful brush for a very tidy machine. Congrats! :)

I agree with John Bennett it sound slike static buildup in the plastic pipe.

I think the wire would need to be inside the pipe where the air is moving.

On my air setup I saw some static issues...

You could try some paper masking tape layed down over the "slick" 8020 metal table (under the workpiece obviously).

That should provide a lot more grip than the slippery metal and is fairly...

I'm not sure it was a fault with the mouse. The micro inside the mouse usually does a good job of debouncing button input so it should not detect a button press on local electrical noise. And the...

I'm a "guy from SuperPID" and thank you for posting your solution. :)

It's probably also wise to mention that the PC690 uses through-ventilation (like most routers) so any foam or structure added...

I think you main problem would be overhang?

A moving table machine already cuts to the edges of the table, which must be the edge of the bearing supported area.

So if your gantry moves past...

I killed a 650W Ozito, they were badly made. Bunnings replaced it free for a new 850W type, which has lasted a couple of years now and has much better bottom bearing support, larger bottom bearing...

Surface grinding is a very common and cheap procedure used for auto cyclinder heads and other big slabs of metal. It might just be easier to leave some metal hanging out and get it ground later. Just...

Check the forum section devoted to making "epoxy granite" machine frames. The material is only about 15% epoxy and makes a result similar to solid stone, but less brittle.

It's close to the...

That symptom can occur if the motor wires are not connected right. Please check your motor wires and make sure the common wires are connected to V+ and the phases A,A-,B,B- are all correct.

The...

That's why your robot overlord has arms! So it can cover up its e-stop button. ;)