The bridgeport milling machine is one of the best machines for manufacturing precision parts. I was working for many years when I was young with an equal and when I watch the video I remember those times. Greetings from Spain
Mister Pete this is a good learning video. I worked in machining for years and a good trick I learned was with a long probe if you make the face of the dial parallel to work it's a lot easier to read the dial. Just adjust the probe about 90° to the dial and when you turn the spindle you can see the dial all the way around.
Thank you Mr. Pete. I am surprised you did not indicate that unknown upper ring in the rotary table to determine if it is exactly round after you centered the taper.
Mrpete222/tubalcain/Mr. Peterson - There is absolutely no doubt you were, and are, a great machine shop teacher. It must be nice to know that your legacy of turning out machinist will live long past you. I had a great first year shop instructor, but he left us for a better position within the education system. Our second year instructor was a machinist, but was by no means a "teacher." I liked him, but I didn't learn much from him. That was 48 years ago. - Keep 'em coming. See you in the next video.
Thanks for making the video. I prefer to use a coaxial indicator in my mill spindle to avoid having to use a mirror in order to read the indicator dial.
I wish I wouldn't have a shop teacher like you. I'm old enough that you would be called a kid in my world I come from the days when voice talk shop and girls took homak that's how old I am television was the thing of the future. We didn't even have metal working in our shop class it was strictly woodworking back then so I am jealous of the kids of today who get to operate find metal working machinery.
In the first two examples once the indicator was set at true zero for the X axis you then moved the indicator to the front for the Y axis. Why did you move the bezel to zero instead of moving the table until the indicator read zero. You did this on the rotary table but not on the first two holes. Is there a reason for this?
I often find the center of a hole using the edge finder, but like you did I use an indicator to find the center of round stock. Can an edge finder be trusted coming from the outside of a circle?
Dear Pete, I don't know if you are gone look to my problem, thou I'll hope you do. First, I'm new, always wanted to be a machinist, (I'm a retired printer). I bought a Adcock-shipley (1954) horizontal milling machine + vertical millinghead. I did the tramming in the x and y direction, of the vertical millinghead, as close I could get it, 0,01...mm. * But, now is my question: how can I solve the problem of leaning. When I put a indicator on the foundation of the mill and I travel in the X- direction, I have a difference between the two sides, 0,3mm. And in the Y- direction 0,18mm. Now I have shimmed my vice. I would like to use the horizontal milling more with clamps. But I dare not, I'm afraid my milled parts will not be parallel. I'm I wrong or right? Ps there's no play in the movement. Greetings Lammertyn Mc
Sorry I don't understand. I know the bore is concentric with the indicator, but how did you check that the indicator was perfect with the spindle. in the video you did it by eye, what do you do if it has to be perfect??
Sir, if you could recommend a type of indicator for a first timer, what type would you recommend? I see some that are rear and different design types. I am a amateur home machinist who is getting their first machine.
The most accurate method I've seen, for indicating a Rotary Table, is to put the indicator on a mag base, and attach that to the Rotary Table, then indicate the spindle of the Milling Machine, by turning the Rotary Table.
I had to chuckle, when you turned the crank the wrong way and said, "Wrong way Corrigan". At the same time, I said, "Wrong way Peachfuzz". Absolutely, no disrespect intended. It just shows a difference in generations. I was a kid in the early '60s and on the Rocky and Bullwinkle cartoons, there was a character named, "Captain Wrong Way Peachfuzz". He was always doing things like looking through the wrong end of binoculars, among other things. The same thing happened years ago, with an older toolmaker that I used to work with. LOL!
Mr Peterson, not wishing to teach grandma to suck eggs and cosine error aside I think it is also important to account for the length of the DTI stylus. I doubt for instance the long stylus on the 0.0005 Federal DTI is the correct calibrated length. If it is that is one hell of a DTI :) If the stylus has been changed the readings obtained may not be correct. This is particularly important when using (IMHO horrid) coaxial indicators which come with a variety of styli lengths. An overly long stylus will desensitise the DTI causing it to under read the error and visa versa. I realise in this demo, the centering was mainly qualitative in nature but if true quantitative measurements are required this variable must be understood and accounted for. A topic for a part 3 perhaps? BTW a way to get a cheap better than 1/2 thou indicator is to by a "standard" metric 0.01mm indicator since 0.01mm is less than 0.0005 thou so you get sub 0.0005 readings for 0.001 prices.
I don't believe cosine error is of any consequence in this instance. MR. Pete is not taking any measurement here. In other words the final result is zero. So zero = zero in all directions no matter the cosine error.
I have personally witnessed what Rob B is talking about. The way I have seen it play out is that when you put a longer test tip on an indicator ( specifically a Brown & Sharpe / TESA ) you end up getting readings that are sometimes as much as 3 times less resolution. Example: Yes, zero is zero, but, if you see an error between X- and X+ of only .0002" you might call it good. However, with the correct tip, the error is actually .0006". Depending on the job, that might not be good enough. I have seen it as bad as 5 times less resolution with different tip and indicator combinations.
Hi After watching the video I purchased the same edge technology holder - like the idea of the thumbscrew mod - does anyone know what thread is used on the original pin? Thanks
Thanks for the reply mrpete did you retap the holder to suit your thumb screw ? Or did you use another method to be able to use the new thumb screw to secure the DTI? Thanks again for a great channel.
Not to be a smart ass, I have learned the hard way to use the end dovetail with the face flat and the pointer pointed down keeps me from having to walk around the table. Time for more coffee.
Do we hear another project being "printed" in the background? Don't keep us in suspense, or is it your income tax? This early usually means a refund. Hope so.
I'm not clear on the necessity to indicate the rotary table. Wouldn't you still need to indicate the work once it's mounted to the table? Full disclosure, I don't own a rotary table.
You need to indicate the center of the rotary table is because that is the center of the radius you are cutting. The offset you make from that center is the actual radius you are cutting. The only exceptions from that is elipsises that are not figured from a center of the rotary table.. Hope this helps you.
The bridgeport milling machine is one of the best machines for manufacturing precision parts. I was working for many years when I was young with an equal and when I watch the video I remember those times. Greetings from Spain
Thank you for watching, yes they are a great machine
Mister Pete this is a good learning video. I worked in machining for years and a good trick I learned was with a long probe if you make the face of the dial parallel to work it's a lot easier to read the dial. Just adjust the probe about 90° to the dial and when you turn the spindle you can see the dial all the way around.
When I was an apprentice years ago. The master machinist taught me this.
Excellent.....I learn something from every one of your videos. Thank you so much!
Glad to hear it!
Saturday morning with my coffee and watching mrpete at is best thank you sir
mrpete222, There would be many more young and confident machinists around if all teachers were like you.
Great tutorial video! It would be nice to see edge technology put a fine adjustment feature on those arms, thanks again.
Thank you Mr. Pete. I am surprised you did not indicate that unknown upper ring in the rotary table to determine if it is exactly round after you centered the taper.
Mrpete222/tubalcain/Mr. Peterson - There is absolutely no doubt you were, and are, a great machine shop teacher. It must be nice to know that your legacy of turning out machinist will live long past you. I had a great first year shop instructor, but he left us for a better position within the education system. Our second year instructor was a machinist, but was by no means a "teacher." I liked him, but I didn't learn much from him. That was 48 years ago. - Keep 'em coming. See you in the next video.
Thank you very much for the high complement--keep watching!!
Great video. I learn something new each time I watch one of your video. Thank you.
Edge makes some very nice tools. Nice demos.
Thanks Mr. Pete, another very informative video.
Again, I enjoy watching, keep it coming.
Excellent teaching skills you have.
I loved the indicator series for the Bridgeport
Thanks
Thanks for making the video. I prefer to use a coaxial indicator in my mill spindle to avoid having to use a mirror in order to read the indicator dial.
A great many thanks to you with your experience to share your knowledge with us striving to learn. you are a good man!
Thank you
Mr Pete try a vertical indicator for these operations, saves all that moveing around to see the dial. Your faithful shop teacher Randy
I wish I wouldn't have a shop teacher like you. I'm old enough that you would be called a kid in my world I come from the days when voice talk shop and girls took homak that's how old I am television was the thing of the future. We didn't even have metal working in our shop class it was strictly woodworking back then so I am jealous of the kids of today who get to operate find metal working machinery.
You must be older than I. We had a Westinghouse television by 1955. Black-and-white of course
In the first two examples once the indicator was set at true zero for the X axis you then moved the indicator to the front for the Y axis. Why did you move the bezel to zero instead of moving the table until the indicator read zero. You did this on the rotary table but not on the first two holes. Is there a reason for this?
Love the moving Sharpie wound on your thumb(s). Were you perhaps a fan of "WKRP in Cincinnati" and the wonderful Les Nesman and his Band-Aids?
outstand video mrpete; i also am sold on the coaxial indicator
I often find the center of a hole using the edge finder, but like you did I use an indicator to find the center of round stock. Can an edge finder be trusted coming from the outside of a circle?
Dear Pete,
I don't know if you are gone look to my problem, thou I'll hope you do.
First, I'm new, always wanted to be a machinist, (I'm a retired printer).
I bought a Adcock-shipley (1954) horizontal milling machine + vertical millinghead.
I did the tramming in the x and y direction, of the vertical millinghead, as close I could get it, 0,01...mm.
* But, now is my question: how can I solve the problem of leaning.
When I put a indicator on the foundation of the mill and I travel in the X- direction, I have a difference between the two sides, 0,3mm. And in the Y- direction 0,18mm.
Now I have shimmed my vice.
I would like to use the horizontal milling more with clamps. But I dare not, I'm afraid my milled parts will not be parallel. I'm I wrong or right? Ps there's no play in the movement.
Greetings Lammertyn Mc
Mr Pete can you use a large tampered cone to center this up?
Sorry I don't understand. I know the bore is concentric with the indicator, but how did you check that the indicator was perfect with the spindle. in the video you did it by eye, what do you do if it has to be perfect??
Charles Lamberth, watch the video again it carn't be anything else other than perfect.
Sir, if you could recommend a type of indicator for a first timer, what type would you recommend? I see some that are rear and different design types. I am a amateur home machinist who is getting their first machine.
Thank you for sharing your knowledge.
Thank You for another interesting and informative video, -(As Always).
Lyle, is it more accurate to measure from the collet or the spindle of the machine ?
learning alot here off seeing your videos.. thank you very much.
Thanks
Hello do you have info on the book your referencing?
The most accurate method I've seen, for indicating a Rotary Table, is to put the indicator on a mag base, and attach that to the Rotary Table, then indicate the spindle of the Milling Machine, by turning the Rotary Table.
Thanks
I had to chuckle, when you turned the crank the wrong way and said, "Wrong way Corrigan". At the same time, I said, "Wrong way Peachfuzz". Absolutely, no disrespect intended. It just shows a difference in generations. I was a kid in the early '60s and on the Rocky and Bullwinkle cartoons, there was a character named, "Captain Wrong Way Peachfuzz". He was always doing things like looking through the wrong end of binoculars, among other things. The same thing happened years ago, with an older toolmaker that I used to work with. LOL!
lol
Mr Peterson, not wishing to teach grandma to suck eggs and cosine error aside I think it is also important to account for the length of the DTI stylus. I doubt for instance the long stylus on the 0.0005 Federal DTI is the correct calibrated length. If it is that is one hell of a DTI :) If the stylus has been changed the readings obtained may not be correct. This is particularly important when using (IMHO horrid) coaxial indicators which come with a variety of styli lengths. An overly long stylus will desensitise the DTI causing it to under read the error and visa versa. I realise in this demo, the centering was mainly qualitative in nature but if true quantitative measurements are required this variable must be understood and accounted for. A topic for a part 3 perhaps? BTW a way to get a cheap better than 1/2 thou indicator is to by a "standard" metric 0.01mm indicator since 0.01mm is less than 0.0005 thou so you get sub 0.0005 readings for 0.001 prices.
I don't believe cosine error is of any consequence in this instance. MR. Pete is not taking any measurement here. In other words the final result is zero. So zero = zero in all directions no matter the cosine error.
He's making differential measurements 180 degrees in opposition. The effects you mention would cancel.
read the post again. the subject was not cosine error rather accuracy and resolution of indicated error with various length styli.
Rob B, you don't need to calibrate to get a zero from all sides, so whats all that about.
I have personally witnessed what Rob B is talking about. The way I have seen it play out is that when you put a longer test tip on an indicator ( specifically a Brown & Sharpe / TESA ) you end up getting readings that are sometimes as much as 3 times less resolution. Example: Yes, zero is zero, but, if you see an error between X- and X+ of only .0002" you might call it good. However, with the correct tip, the error is actually .0006". Depending on the job, that might not be good enough. I have seen it as bad as 5 times less resolution with different tip and indicator combinations.
Thanks Mr Pete
Hi After watching the video I purchased the same edge technology holder - like the idea of the thumbscrew mod - does anyone know what thread is used on the original pin? Thanks
Thanks for watching and supporting my channel and my sponsors. I do not know what the thread size is
Thanks for the reply mrpete did you retap the holder to suit your thumb screw ? Or did you use another method to be able to use the new thumb screw to secure the DTI? Thanks again for a great channel.
Thanks for sharing sir..
Mucho thanks Pete
This is great thank you!
Heck ya coffee an @mrpete222 Saturday morning .@steph22
Not to be a smart ass, I have learned the hard way to use the end dovetail with the face flat and the pointer pointed down keeps me from having to walk around the table. Time for more coffee.
1musicsearcher except that the indicator body may sweep a larger circle diameter than the bore you are dialing.
Do we hear another project being "printed" in the background? Don't keep us in suspense, or is it your income tax? This early usually means a refund. Hope so.
i know that background sound well
I'm not clear on the necessity to indicate the rotary table. Wouldn't you still need to indicate the work once it's mounted to the table? Full disclosure, I don't own a rotary table.
yes and any other work holding devices like a chuck.
You need to indicate the center of the rotary table is because that is the center of the radius you are cutting. The offset you make from that center is the actual radius you are cutting. The only exceptions from that is elipsises that are not figured from a center of the rotary table.. Hope this helps you.
Randell Jones lp
First on a mrpete vid WOW