Info needed for installing/setting up pm940m

[verbotenwhisky]

I will get it. As soon as the paycheck comes. what is needed is needed.

My 2 cents worth, my philosophy is money to buy tools is never wasted; but when buying a tool I try to maximize my purchase, think about what I can use the tool for and is there another tool which will do the job just as well and be useful for other task as well.

 

[tim81]

I totally agree. I do it too. I don’t want to overpay. I know there are Ferraris out there but I drive a Subaru that is what I can buy or need.

 

[Sticks]

But backlash is more of an issue. A set of drilled holes don't always match up to another piece of with drilled holes. To aovid this when drilling I try to always move toward each of the holes from the same starting reference point.

An easier Habit to get into is just whatever your final measurement is going to be on the dial, always go either clockwise or counterclockwise to that point. So if you're having to back away from something you would go past your measurement and then dial back to it.

 

[tim81]

An easier Habit to get into is just whatever your final measurement is going to be on the dial, always go either clockwise or counterclockwise to that point. So if you're having to back away from something you would go past your measurement and then dial back to it.

How does it work that way

 

[verbotenwhisky]

How does it work that way

Always go to the measurement from the same direction even if you dial past and come back to it. If you rotate the dial clockwise to get to a setting then counter clockwise to get to the next the run out will be between them and your measurement will be + run out while if you rotate counter clockwise past the second setting then rotate clockwise back to it your dialing the run out out of it.

 

[tim81]

Always go to the measurement from the same direction even if you dial past and come back to it. If you rotate the dial clockwise to get to a setting then counter clockwise to get to the next the run out will be between them and your measurement will be + run out while if you rotate counter clockwise past the second setting then rotate clockwise back to it your dialing the run out out of it.

My brain is fried now.

 

[verbotenwhisky]

My brain is fried now.

Sorry man, I was distracted.... If you turn the hand wheel clockwise to set a point and machine one side of a feature then you need to rotate the hand wheel counter clockwise (back up) to machine the next feature go past the point at which you need to stop then turn it clockwise back to the point you need to stop at; otherwise you will add the amount of run out to your measurement as Sticks said you want to turn it the same direction. Do this, turn the wheel a couple inches clockwise to move your carriage/table then rotate it backwards 1" and take a measurement (do this without your DRO on.

 

[tim81]

Now I understand it. Dang man this machining stuff is step learning. I am learning the lathe too now. I guess it translates both ways.

 

[B2]

How does it work that way

It is called "Backlash" or "Hysteresis" in other vocabulary. By backing up and always going the same way you have the same amount of backlash each time you do the measurement. Think about is as a loose nut on a bolt. It moves a little before the threads of the two meet up. You always one the same side of the threads of the bolt pushing on the same side of the threads of the nut.

 

[tim81]

It is called "Backlash" or "Hysteresis" in other vocabulary. By backing up and always going the same way you have the same amount of backlash each time you do the measurement. Think about is as a loose nut on a bolt. It moves a little before the threads of the two meet up. You always one the same side of the threads of the bolt pushing on the same side of the threads of the nut.

Cool, I think I will master this one as a DRO Is out of the question for a little bit.