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Sir,

I posed the question to a Flow user and his reply is below:

JC

I cannot remember my login to that site but if you would like to post the following it is ok.
There is not a way to...

Sir,

When designing something like this, one starts with the total weight of the system that is to be moved, the max speed needed, the acceleration needed, the friction associated with moving, and...

Sir,

I assume that you are using stepper motors.

I would have to say that you have some springiness in your drive system. I prefer rack and pinion as it is quite stiff. Try programming a series...

Sir,

It would be better if you could extend the distance between front and rear bearing sets on the master side. One might consider a ratio of 3:1, 3 = width of cross axis, 1 = distance between...

Sir,

Your machine appears to have good craftsmanship on making and assembling the parts.

You could improve the stiffness by using the approach we used on machines with single side drives....

Sir,

How do you provide drives to both sides of your crossbeam? It is not clear from the picture. More pictures of drive details would be helpful as well as a picture of your pen tracing so that...

Sir,

Any chance of including a picture of your present setup?

Regards,
Jack C.

Keith,

You are right - - -it has been a long time since I worked on a Burny 3!!! HOWEVER, I noted a company called Valley Cutting Systems, a CA company, that has Basic Omniport Adapter which will...

Keith,

The Burny 3 had a floppy drive that can take standard word address programs. That was the primary way of handling the programming. You can make your program(s) on your computer, put them on...

Sir,

I have attached 3 pix of a small machine (32 x 36) that I made as a test bed wherein I have used this pivoting technique.

You can see the arm to which the motor is attached in #034 as...

Sir,

Your belt reduction looks well made.

1) I couldn't tell for sure where the pivot point for your drive is located. Ideally, the pivot lies in the plane of the rack teeth or as close as...

Sir,

I have always found it very informative to see how other successful machines are built. In that area, commercial machines have been used extensively so they offer good examples of decent...

Sir,

As the previous guy suggested, pictures of your drive showing the pivot point of your drive mount would be a great help. There are some things that *many* overlook in designing/making their...

Sir,

What do you want to do with the machine, cut HVAC fittings, or do general plasma cutting of misc parts? You may be able to find someone that has the Creonics control and get some help from...

Sir,

Have you tried regular G code to control the machine? Perhaps Allen Bradley can assist you in getting the machine operating. Likely the Lockformer program is primarily for cutting HVAC...

Sir,

In looking at your first line, G1 Y7.628 Z.625 F20:

This is linear interpolation: in moving Y 7.628 you are asking for Z to move +.625 ???
I don't understand why there is any Z motion...

Sir,
Why ot do a new post asking specifically for what you need. There ae a lot on this site that likely can help you.

Regards,
Jack C.

Sir,

Initially you mentioned using 20 DP, 14 1/2 degree PA gearing. I would use 24 DP, 20 degree components; they run more smoothly and the min number of teeth [for no undercutting on the pinion]...

Sir,

We had one customer on the west coast who was cutting thin SS. He had a water table where the water depth just covered the top of the sheet when it was in position to cut. When the cycle...

Sir,

Looking up your supplier, they have a similar motor, SM23165D, for which one can buy their 28:1 gearbox (see their specs). The above motor has 10,000+ max RPM, it is one of their smaller...

Sir,

If you can tell us which motor you are using, we can comment better on your situation.

Regards,
Jack C.

Sir,

I have a problem with some of the numbers you gave us: if you were correct, your gear rack having 5 teeth per inch is a 16 DP rack. The gear data you gave us was 30T, 2.5" OD which seems to...

Steve,

There is one more thing of importance: what is the number of counts per revolution for your encoder mounted on the end of the motor shaft? With that and the gear ratio + pinion pitch...

Sir,

In order to evaluate your design, I would need to know the specs for your drive motors, the max voltage available from your servo amp, and the max traverse speed that you need. Some DC motors...

Sir,

First you should establish than there is NO lost motion (backlash). Try the to see if there might be some looseness between the stepper motor shaft and the output gear: it is possible that a...

Gentlemen:

Here's what I learned about piercing form steel service centers and associates in the company we had:

For those that have to pierce thick plate, the machine is set up with "ease-on"...

Z77,

What you have is a motor-tachometer combination. The motor is a DC permanent magnet motor and it is the larger of the two cylinders near the gearbox. The tach is a permanent magnet DC tach...

Sir,

I have never liked leadscrews in a plasma cutting environment. Not only do you have the problem of critical speed (whip), but keeping the screw threads clean is difficult. Although many other...

Sir,

If you will email me with your address, I will send you a CD with 15 + pictures of the 32" x 36" test bed machine I made for trying out my CNC controller. I use the machine for routing so it...

Sir,

Do you write the program for your machine yourself? If so you can make your own leadin or leadout. That would give you a chance to tryout your ideas and see if they work. You might do so on a...