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khalid,

The industrial CNC machines use a touch probe to zero a workpiece. The probe is loaded into the spindle with the automatic tool changer. The probe communicates with a fixed base unit...

khalid,

I've admired your work for some time. Nice to finally get a chance to talk with you.

Manually finding the edge of a workpiece is easy. The least expensive way is to use the shank of a...

I've used these, very pleased with their performance...

Vernon Devices, manufacturers of CHAM-BIT, the Variable position chamfer tool. Drill and deburr or chamfer in one operation.

Gerry,

Mach3 is a great program, but the "native units" concept seems to be poorly thought out. I use G20 in Mach's initialization string and have never had a problem, but I'm not taking any...

Mach's setup screens can be very confusing. The green check mark = active low, the red X = active high. This is true for the input pins and the step and direction pins. For example, if your limit...

Mariss,

That is exactly what I was going to say. Geez Mariss, if you keep jumping in with real-world experience and advice that actually works, you're going to spoil it for the rest of us...

Sorry, John.

My question was directed to amishx64, I don't know why I used your name... :confused:

amishx64,

I'm curious how you are calculating linear speed from rotational speed with no linear reference. Also, unless you're using a tachometer to measure the rpms, you can't be sure that it...

I think that your 'steps per' in the X axis movement profile is set incorrectly.
Note that the 'steps per' is not steps per revolution of the motor, but the number of steps needed to move the X axis...

Well done, neric. Thanks for posting your results!

neric,

Try setting up the 555 (as a missing pulse detector) for a pulse train with a period of 1 second. The 35kHz kernel speed doesn't matter.

Your stepper controller will output pulses at...

How about this:

When a pulse is detected, light the led. If no more pulses arrive within the next second, turn it off. Easy with a microcontroller, could also be done with a cmos flip-flop and a...

If it ALWAYS outputs the same value with different inputs, it could be a setting for the Z axis negative limit. Okay, I'm done...

It looks like two different things are going on. The software is scaling the z value (10 %) and rounding the Z value to the nearest thousandths of an inch . Your 1.80 mm depth X .1 = .180mm, should...

A zero flute or 1 flute countersink bit will give the best result. No chatter and a decent finish. The rounded pipe surface will produce an uneven chamfer.

Here's a link to one supplier's...

Don't know if this helps, but .42 mm per revolution X 15000 rpm = 6300 mm per minute, as seen in the code...

Guys, it's been fun. I respect all those who shared their opinions, and also learned a bit. Now I'm going back to work on the longest router build in history.

If only I could afford to make this...

Geof, as the cost of energy increases beyond our ability to pay, we will be forced to embrace any energy source that does the job cheaper. You're correct that renewable energy represents only a...

But, natural gas is also a limited resource! Natural gas prices will skyrocket too! Hydrogen can be produced using renewable energy sources (solar, wind, geothermal), through electrolysis of water. ...

Very true, Geof. But with the increased demand for oil & gas, we may start getting serious about alternative fuels. Probably when gas sells for upwards of $10.00 a gallon. At those prices, a cheap...

Hydrogen production doesn't require huge sprawling facilities. It can be produced on site at refueling stations...

DOE Permitting Hydrogen Facilities: On-Site Hydrogen Production

Are you using an endmill holder or collet to hold the tool? Is the tool length too long? Are you using flood coolant? Any evidence of aluminum loading on the inserts? Are you sure you have the...

A course pitch thread is a bad choice in this application. Use a fine pitch for tapping thin material. You'll have more thread engagement.

Use a 1/4-28 uncoated spiral flute tap, and some cutting...

Don't know if this helps, but we had the same problem with radial tapping on an Okuma LB25 lathe. Fortunately, the control has a turret parameter screen which controls the direction of the live...

There could be a problem with the port settings, or the port voltages.
Check the PC's BIOS to make sure it is configured as a bi-directional port.
Check the port pins voltage output for 0 volts...

I've used a two-part polyurethane resin I purchased on Ebay.

This stuff cures FAST. You have less than 3 minutes to mix the 2 parts and fill your mold. You can demold in about ten minutes. ...

There's a process called immigration. Many red, white and blue Americans weren't born here. They came from other countries. Just as your ancestors probably did.

CNCRim asked a valid question. And your criticism of the way the question was posted contributes nothing to the forum.

Did it occur to you that English may not be his native language?

As you previously stated, the rails don't have to be supported along their entire length. If it saves money, cut the supports and space them along the rail.

Not as rigid as fully supported rails,...

Good deal. Plus, the rails are hardened and (I would assume) already drilled and tapped for the supports.