I am a very recent addition to this forum (Today).? I am posting because I just discovered that Kellyware is no longer exists.? Does anyone know when he shut it down and why?? I have been using it for close to 20 years and in a panic.? I am using his Max32 USB control board and have had really good results.? Any suggestions on a replacement software?? I liked KCam because it was very affordable.? Been retired for 20 years and would hate to give up my CNC hobby!
Thanks,
Fred
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CNC Machining: 22 steps,Tips And Tricks with pictures
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Machining for precision takes more than clicking some buttons: surprised?
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Here are 22 CNC Machining? Steps, Tips And Tricks that you will love
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Or just my brain is numb… ? I think it was the getting the through hole on center with the nub center axis on the lathe that has me stumped. ?On the mill with my electronic edge finder and the collet chuck on center this is pretty easy. ? John ? ?
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From: [email protected] [mailto:[email protected]] On Behalf Of Roy via Groups.Io
Sent: March-02-20 8:11 PM
To: [email protected]
Subject: Re: [CAD-CAM-EDM-DRO] Work Holding? I'd do it as a 4 jaw chuck project. Face one surface, flip it & make the other 3 surfaces perpendicular/parallel to the first surface, turn the 25 mm spigot then flip it & make the threaded hole - I'd single point it instead of buying a special tap. After cutting the thread, hacksaw a slit in the middle & use a couple of headless set screws to spread things apart to take up backlash.
"Numb" for "nub" looks like auto-correct rearing its head.
Roy?
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Moderated
10 Tips For CNC Milling Machine Users
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?If you have an idea in mind on how to carve-out your first CNC parts, begin with our 10 helpful tips. You’ll get a lot of information you need on how to proceed with your first milling project.
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I'd do it as a 4 jaw chuck project. Face one surface, flip it & make the other 3 surfaces perpendicular/parallel to the first surface, turn the 25 mm spigot then flip it & make the threaded hole - I'd single point it instead of buying a special tap. After cutting the thread, hacksaw a slit in the middle & use a couple of headless set screws to spread things apart to take up backlash.
"Numb" for "nub" looks like auto-correct rearing its head.
Roy?
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Thanks Richard,
One other idea I have that certainly didn't come with the user manual is the distance from the top of the X Table to the milled flat area by the 25mm hole. So I have to take the lead screw out again, slide the table over far enough so that I can come up with a measurement that is accurate to at least 0.0005". Once I have that I could then recast and re-machine the end plates with the entire lead screw moved up so there's enough clearance for a ball nut assembly. Right now there isn't.
The existing replacement end plates were matched to the old ones that used bronze bushings where the new ones use a double set of angular contact bearings at the motor end and a regular ball bearing at the RHS where the power feed was. I think the original distance to the leadscrew was based on the mounting holes in the power feed end plate which is a die casting and there's not a lot of latitude for up/down position.
However there is lots of room above the lead screw so going up 10mm to make room for a ball nut would not be an issue. This doesn't change the need for a mounting bracket that places the ball nut face at right angles to the table surface and a ball nut mount will need to be precise compared to a sloppy fitting ACME nut.
Oh and the really most annoying part of this conversion? The holes drilled and tapped into the end the table are not precisely positioned. Especially the RHS where the power feed was. It was mounted so it was twisted by about 3 degrees. Once they had it aligned they drilled for taper pins. On the new motor and bearing mount castings I can't use the taper pin holes. They aren't a proper distance from any reference surface either. Sigh...
John
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-----Original Message-----
From: [email protected] [mailto:CAD-CAM-EDM-
[email protected]] On Behalf Of Richard
Sent: March-02-20 12:07 AM
To: [email protected]
Subject: Re: [CAD-CAM-EDM-DRO] Work Holding
I do not have a problem with your approach. Clamp 4 jaw, turn spigot
(nub), then hold in collet block to drill and bore.
I would superglue a piece of 1/2" aluminum to what will be the bottom
face of your piece in the collet then after clamping the collet block in
the vice place a jack under the aluminum and jack up tight. You can now
drill and bore on through into the aluminum. Jack there for security.
Aluminum so you do not drill jack! After boring I would skim the top
face then turn over remove alu block and skim the other face at the same
height. You could do the same to the sides as it would make the
subsequent holding in the 4 jaw easier. Initially (given that amount of
material) I would make the spigot as long as possible to assist in
holding in the collet, then machine to drawing length last thing. Last
point do you have a 25mm collet? If only a 1" then I would turn to 1"
and at the end of the job turn down to 25mm.
Good luck
Richard
On 01/03/2020 21:02, John Dammeyer wrote:
I think this may be the best forum to ask this question as it's less
about CNC machining and more about general machining.
The photo is of the ACME bronze nut on my X axis mill table.Clearly a
casting with the numb turned to 25mm and an almost press fit into the
X axis location.
I think the way it was made was that it was held in a 4 jaw chuck and
turned to be that exact 25mm.Then perhaps held in a collet chuck on
the mill and bored and tapped?And the backlash on this little beast is
almost 0.025"
So I'd like to reproduce it but with an adjustable backlash
remover.Something like the attached CAD drawing.
I don't want to spend over $100 on a 1" x 5 TPI ACME tap.Likely a
boring tool with the right profile can be used on the with the
advantage that I can have the lead screw out of the mill for trial
fits as I sneak up to the dimension.
Is first turning the nub to 25mm while the replacement slightly larger
bronze piece is held in the 4 jaw the right way to go?I want the
horizontal hole for the thread to be exactly perpendicular and on
center to the nub.Is a 5C collet holder accurate enough on the mill so
I can drill and then bore to the thread size?
I can see at the same time using an end mill to flatten the drilled
surface so that it's placed against the back of the 4 Jaw and then the
4 jaw is adjusted until the bored hole indicates that it's on center.
Or should the ACME threaded hole be drilled and tapped first and then
somehow held so that the 25mm numb is turned?The centerline of the
threaded hole has to be exactly 19.80mm (although I might have
measured wrong and it's 20mm since the rough dimensions of the casting
are 40mm x40mm.
If I get that height wrong of course the leadscrew will be too low
relative to the bearings on the end of the X axis table.
Looking for suggestions and ideas.
John
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Here is a cheap and probably fast alternative to what you want to do. Buy one of these for $12http://www.tacomascrew.com/Products/Acme-Nuts/062-104-1_10?gclid=CjwKCAiA-vLyBRBWEiwAzOkGVMZ5YcSwqZc6_Ub9xYUrqpu8Q8KGMuYT-JnXrj3e5sL4GoA9vSXOkBoCmOAQAvD_BwE&whence=?? and then modify it so that it is an add on to the existing drive nut. By adjusting the distance between the two will change the backlash.? Or if you want plastic nut that is comparable to harder materials this will do it? for $62 ? ? Dan Mauch
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From: [email protected] [mailto:[email protected]] On Behalf Of John Dammeyer
Sent: Sunday, March 01, 2020 1:02 PM
To: [email protected]
Subject: [CAD-CAM-EDM-DRO] Work Holding? I think this may be the best forum to ask this question as it's less about CNC machining and more about general machining. ? The photo is of the ACME bronze nut on my X axis mill table.? Clearly a casting with the numb turned to 25mm and an almost press fit into the X axis location.? ? I think the way it was made was that it was held in a 4 jaw chuck and turned to be that exact 25mm.? Then perhaps held in a collet chuck on the mill and bored and tapped?? And the backlash on this little beast is almost 0.025" ? So I'd like to reproduce it but with an adjustable backlash remover.? Something like the attached CAD drawing. ? I don't want to spend over $100 on a 1" x 5 TPI ACME tap.? Likely a boring tool with the right profile can be used on the with the advantage that I can have the lead screw out of the mill for trial fits as I sneak up to the dimension.? ? Is first turning the nub to 25mm while the replacement slightly larger bronze piece is held in the 4 jaw the right way to go?? I want the horizontal hole for the thread to be exactly perpendicular and on center to the nub.? Is a 5C collet holder accurate enough on the mill so I can drill and then bore to the thread size??? ? I can see at the same time using an end mill to flatten the drilled surface so that it's placed against the back of the 4 Jaw and then the 4 jaw is adjusted until the bored hole indicates that it's on center. ? Or should the ACME threaded hole be drilled and tapped first and then somehow held so that the 25mm numb is turned?? The centerline of the threaded hole has to be exactly 19.80mm (although I might have measured wrong and it's 20mm since the rough dimensions of the casting are 40mm x40mm. ? If I get that height wrong of course the leadscrew will be too low relative to the bearings on the end of the X axis table. ? Looking for suggestions and ideas. ? John ? ? ?
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Re: ReWET: [CAD-CAM-EDM-DRO] ADVANTAGES OF CNC OVER CONVENTI
?? PLEASE read my post carefully. ? Perhaps you should go back & read the article and my initial reply just as carefully. ? Tony ? ?
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From: [email protected] [mailto:[email protected]] On Behalf Of idea2man
Sent: Monday, 2 March 2020 5:03 PM
To: [email protected]
Subject: Re: ReWET: [CAD-CAM-EDM-DRO] ADVANTAGES OF CNC OVER CONVENTI? WOW ALL! ???? I did not want to start a cat fight!!!? PLEASE read my post carefully. I have over 6,000 hours experience on programing, setup and operating the largest 5 axis machine GMC had back in the early 80"s. I saw my first CNC lathe at the Chicago Tool Show in 1960. Just two year ago I took a class on programming live tooling on a CNC lathe.? The Lord has really bless me to see the growth of CNC from back when it was punched tape point to point to what it is now.? Not an old grouch just well blessed. ??????????????????????????????????????????????????????????????????????? Bill Thomas ? On 2020-03-01 18:26, dkmach2 via Groups.Io wrote: I get a chuckle out of the arguments presented by both sides of CNC vs MANUAL machining. Hats off to the accomplishments to the abilities of all of you! You are ALL machinists! Celebrate! I am so thankful the GOOD LORD blessed me to have both worlds in my own shop, and the good sense to know which to choose when a job comes in the door. Denis ? On Sun, Mar 1, 2020 at 11:27 AM, Tony Smith
Sigh. ? I give up. ? Tony ? ? ? Try hand lapping anything but flat surfaces and make 1000 pieces per hour or mor manually. I had a customer that quoted milling on a 1/4 inch square circuit board and he had to do 25,000 of them so he quoted $25 each quote was accepted. He was amazed and made a vacuum table to hold the parts and was making $3500 per hour so 8 days later all the parts were done on a CNC try that manually. ? On Mar 1, 2020, at 11:37 AM, Tony Smith <ajsmith1968@...> wrote: ? I know that, but the person I was replied to didn't mention microns, he said "be hand lapped to millions of an inch" ? The article didn't mention CNCing to microns or millions of an inch, only 10,000ths. ? Tony ? ? ? ? To be fair, the article only claims accuracy for the CNC parts up to 0.0001", ten thou not millionths. ? Having a bunch of machinists cranking out parts to 0.0001" all day long isn't cheap either. ? Tony ? ? ? ? Hi All: ???? This person has done a lot of detail work in this report but from my 60 years of design, machining, and building things from small parts to a multi station paint line I fine that he is to broad in his statements. 1) CNC is more precise then manual machining.? Not true because parts can be hand lapped to millions of an inch and CNC does not machine that close. 2) CNC repair is not expensive.? Let him try and fine a cheap repair man to come 30 to 60 miles to study the problem and change the parts on a CNC machine that is not running right.? Or to change a chip shield that requires special tools to get to the screws that hold it in place. ???? I make these comment from personal experience. ????????????????????????????????????????????????? Bill Thomas ? On 2020-02-29 16:36, Queen Nanu wrote: Let's take a detailed look at the? ADVANTAGES OF CNC OVER CONVENTIONAL
|
I do not have a problem with your approach. Clamp 4 jaw, turn spigot
(nub), then hold in collet block to drill and bore.
I would superglue a piece of 1/2" aluminum to what will be the bottom
face of your piece in the collet then after clamping the collet block in
the vice place a jack under the aluminum and jack up tight. You can now
drill and bore on through into the aluminum. Jack there for security.
Aluminum so you do not drill jack! After boring I would skim the top
face then turn over remove alu block and skim the other face at the same
height. You could do the same to the sides as it would make the
subsequent holding in the 4 jaw easier. Initially (given that amount of
material) I would make the spigot as long as possible to assist in
holding in the collet, then machine to drawing length last thing. Last
point do you have a 25mm collet? If only a 1" then I would turn to 1"
and at the end of the job turn down to 25mm.
Good luck
Richard
toggle quoted message
Show quoted text
On 01/03/2020 21:02, John Dammeyer wrote:
I think this may be the best forum to ask this question as it's less
about CNC machining and more about general machining.
The photo is of the ACME bronze nut on my X axis mill table.Clearly a
casting with the numb turned to 25mm and an almost press fit into the
X axis location.
I think the way it was made was that it was held in a 4 jaw chuck and
turned to be that exact 25mm.Then perhaps held in a collet chuck on
the mill and bored and tapped?And the backlash on this little beast is
almost 0.025"
So I'd like to reproduce it but with an adjustable backlash
remover.Something like the attached CAD drawing.
I don't want to spend over $100 on a 1" x 5 TPI ACME tap.Likely a
boring tool with the right profile can be used on the with the
advantage that I can have the lead screw out of the mill for trial
fits as I sneak up to the dimension.
Is first turning the nub to 25mm while the replacement slightly larger
bronze piece is held in the 4 jaw the right way to go?I want the
horizontal hole for the thread to be exactly perpendicular and on
center to the nub.Is a 5C collet holder accurate enough on the mill so
I can drill and then bore to the thread size?
I can see at the same time using an end mill to flatten the drilled
surface so that it's placed against the back of the 4 Jaw and then the
4 jaw is adjusted until the bored hole indicates that it's on center.
Or should the ACME threaded hole be drilled and tapped first and then
somehow held so that the 25mm numb is turned?The centerline of the
threaded hole has to be exactly 19.80mm (although I might have
measured wrong and it's 20mm since the rough dimensions of the casting
are 40mm x40mm.
If I get that height wrong of course the leadscrew will be too low
relative to the bearings on the end of the X axis table.
Looking for suggestions and ideas.
John
|
Re: ReWET: [CAD-CAM-EDM-DRO] ADVANTAGES OF CNC OVER CONVENTI
WOW ALL!
???? I did not want to start a cat fight!!!? PLEASE read my post carefully. I have over 6,000 hours
experience on programing, setup and operating the largest 5 axis machine GMC had back in the early 80"s.
I saw my first CNC lathe at the Chicago Tool Show in 1960. Just two year ago I took a class on programming
live tooling on a CNC lathe.? The Lord has really bless me to see the growth of CNC from back when it was
punched tape point to point to what it is now.? Not an old grouch just well blessed.
??????????????????????????????????????????????????????????????????????? Bill Thomas
?
toggle quoted message
Show quoted text
On 2020-03-01 18:26, dkmach2 via Groups.Io wrote:
I get a chuckle out of the arguments presented by both sides of CNC vs MANUAL machining. Hats off to the accomplishments to the abilities of all of you! You are ALL machinists! Celebrate!
I am so thankful the GOOD LORD blessed me to have both worlds in my own shop, and the good sense to know which to choose when a job comes in the door.
Denis
?
On Sun, Mar 1, 2020 at 11:27 AM, Tony Smith
<ajsmith1968@...> wrote:
Sigh.
?
I give up.
?
Tony
?
?
?
Try hand lapping anything but flat surfaces and make 1000 pieces per hour or mor manually. I had a customer that quoted milling on a 1/4 inch square circuit board and he had to do 25,000 of them so he quoted $25 each quote was accepted. He was amazed and made a vacuum table to hold the parts and was making $3500 per hour so 8 days later all the parts were done on a CNC try that manually.
On Mar 1, 2020, at 11:37 AM, Tony Smith <ajsmith1968@...> wrote:
?
I know that, but the person I was replied to didn't mention microns, he said "be hand lapped to millions of an inch"
?
The article didn't mention CNCing to microns or millions of an inch, only 10,000ths.
?
Tony
?
?
?
?
To be fair, the article only claims accuracy for the CNC parts up to 0.0001", ten thou not millionths.
?
Having a bunch of machinists cranking out parts to 0.0001" all day long isn't cheap either.
?
Tony
?
?
?
?
Hi All:
???? This person has done a lot of detail work in this report but from
my 60 years of design, machining, and building things from small parts
to a multi station paint line I fine that he is to broad in his statements.
1) CNC is more precise then manual machining.? Not true because parts
can be hand lapped to millions of an inch and CNC does not machine that
close.
2) CNC repair is not expensive.? Let him try and fine a cheap repair man
to come 30 to 60 miles to study the problem and change the parts on
a CNC machine that is not running right.? Or to change a chip shield that
requires special tools to get to the screws that hold it in place.
???? I make these comment from personal experience.
????????????????????????????????????????????????? Bill Thomas
?
On 2020-02-29 16:36, Queen Nanu wrote:
Let's take a detailed look at the?
ADVANTAGES OF CNC OVER CONVENTIONAL
?
|
Re: ReWET: [CAD-CAM-EDM-DRO] ADVANTAGES OF CNC OVER CONVENTI
I get a chuckle out of the arguments presented by both sides of CNC vs MANUAL machining. Hats off to the accomplishments to the abilities of all of you! You are ALL machinists! Celebrate! I am so thankful the GOOD LORD blessed me to have both worlds in my own shop, and the good sense to know which to choose when a job comes in the door.
On Sun, Mar 1, 2020 at 11:27 AM, Tony Smith <ajsmith1968@...> wrote: Sigh. ? I give up. ? Tony ? ? ? Try hand lapping anything but flat surfaces and make 1000 pieces per hour or mor manually. I had a customer that quoted milling on a 1/4 inch square circuit board and he had to do 25,000 of them so he quoted $25 each quote was accepted. He was amazed and made a vacuum table to hold the parts and was making $3500 per hour so 8 days later all the parts were done on a CNC try that manually.
On Mar 1, 2020, at 11:37 AM, Tony Smith <ajsmith1968@...> wrote: ? I know that, but the person I was replied to didn’t mention microns, he said “be hand lapped to millions of an inch” ? The article didn’t mention CNCing to microns or millions of an inch, only 10,000ths. ? Tony ? ? ? ? To be fair, the article only claims accuracy for the CNC parts up to 0.0001”, ten thou not millionths. ? Having a bunch of machinists cranking out parts to 0.0001” all day long isn’t cheap either. ? Tony ? ? ? ? Hi All: ???? This person has done a lot of detail work in this report but from my 60 years of design, machining, and building things from small parts to a multi station paint line I fine that he is to broad in his statements. 1) CNC is more precise then manual machining.? Not true because parts can be hand lapped to millions of an inch and CNC does not machine that close. 2) CNC repair is not expensive.? Let him try and fine a cheap repair man to come 30 to 60 miles to study the problem and change the parts on a CNC machine that is not running right.? Or to change a chip shield that requires special tools to get to the screws that hold it in place. ???? I make these comment from personal experience. ????????????????????????????????????????????????? Bill Thomas ? On 2020-02-29 16:36, Queen Nanu wrote: Let's take a detailed look at the? ADVANTAGES OF CNC OVER CONVENTIONAL
|
BTW.? That was supposed to be nub.? Not numb.? Don't know why it changed to numb.? Other than perhaps my brain is that after contemplating this for over a week. John ? ?
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From: [email protected] [mailto:[email protected]] On Behalf Of John Dammeyer
Sent: March-01-20 1:02 PM
To: [email protected]
Subject: [CAD-CAM-EDM-DRO] Work Holding? I think this may be the best forum to ask this question as it's less about CNC machining and more about general machining. ? The photo is of the ACME bronze nut on my X axis mill table.? Clearly a casting with the numb turned to 25mm and an almost press fit into the X axis location.? ? I think the way it was made was that it was held in a 4 jaw chuck and turned to be that exact 25mm.? Then perhaps held in a collet chuck on the mill and bored and tapped?? And the backlash on this little beast is almost 0.025" ? So I'd like to reproduce it but with an adjustable backlash remover.? Something like the attached CAD drawing. ? I don't want to spend over $100 on a 1" x 5 TPI ACME tap.? Likely a boring tool with the right profile can be used on the with the advantage that I can have the lead screw out of the mill for trial fits as I sneak up to the dimension.? ? Is first turning the nub to 25mm while the replacement slightly larger bronze piece is held in the 4 jaw the right way to go?? I want the horizontal hole for the thread to be exactly perpendicular and on center to the nub.? Is a 5C collet holder accurate enough on the mill so I can drill and then bore to the thread size??? ? I can see at the same time using an end mill to flatten the drilled surface so that it's placed against the back of the 4 Jaw and then the 4 jaw is adjusted until the bored hole indicates that it's on center. ? Or should the ACME threaded hole be drilled and tapped first and then somehow held so that the 25mm numb is turned?? The centerline of the threaded hole has to be exactly 19.80mm (although I might have measured wrong and it's 20mm since the rough dimensions of the casting are 40mm x40mm. ? If I get that height wrong of course the leadscrew will be too low relative to the bearings on the end of the X axis table. ? Looking for suggestions and ideas. ? John ? ? ?
|
I think this may be the best forum to ask this question as it's less about CNC machining and more about general machining. ? The photo is of the ACME bronze nut on my X axis mill table.? Clearly a casting with the numb turned to 25mm and an almost press fit into the X axis location.? ? I think the way it was made was that it was held in a 4 jaw chuck and turned to be that exact 25mm.? Then perhaps held in a collet chuck on the mill and bored and tapped?? And the backlash on this little beast is almost 0.025" ? So I'd like to reproduce it but with an adjustable backlash remover.? Something like the attached CAD drawing. ? I don't want to spend over $100 on a 1" x 5 TPI ACME tap.? Likely a boring tool with the right profile can be used on the with the advantage that I can have the lead screw out of the mill for trial fits as I sneak up to the dimension.? ? Is first turning the nub to 25mm while the replacement slightly larger bronze piece is held in the 4 jaw the right way to go?? I want the horizontal hole for the thread to be exactly perpendicular and on center to the nub.? Is a 5C collet holder accurate enough on the mill so I can drill and then bore to the thread size??? ? I can see at the same time using an end mill to flatten the drilled surface so that it's placed against the back of the 4 Jaw and then the 4 jaw is adjusted until the bored hole indicates that it's on center. ? Or should the ACME threaded hole be drilled and tapped first and then somehow held so that the 25mm numb is turned?? The centerline of the threaded hole has to be exactly 19.80mm (although I might have measured wrong and it's 20mm since the rough dimensions of the casting are 40mm x40mm. ? If I get that height wrong of course the leadscrew will be too low relative to the bearings on the end of the X axis table. ? Looking for suggestions and ideas. ? John ? ? ?
|
Re: ReWET: [CAD-CAM-EDM-DRO] ADVANTAGES OF CNC OVER CONVENTIONAL
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Show quoted text
From: [email protected] [mailto:[email protected]] On Behalf Of Harko Schwartz
Sent: Monday, 2 March 2020 4:03 AM
To: [email protected]
Subject: Re: ReWET: [CAD-CAM-EDM-DRO] ADVANTAGES OF CNC OVER CONVENTIONAL? Try hand lapping anything but flat surfaces and make 1000 pieces per hour or mor manually. I had a customer that quoted milling on a 1/4 inch square circuit board and he had to do 25,000 of them so he quoted $25 each quote was accepted. He was amazed and made a vacuum table to hold the parts and was making $3500 per hour so 8 days later all the parts were done on a CNC try that manually.
On Mar 1, 2020, at 11:37 AM, Tony Smith <ajsmith1968@...> wrote: ? I know that, but the person I was replied to didn’t mention microns, he said “be hand lapped to millions of an inch” ? The article didn’t mention CNCing to microns or millions of an inch, only 10,000ths. ? Tony ? ? ? ? To be fair, the article only claims accuracy for the CNC parts up to 0.0001”, ten thou not millionths. ? Having a bunch of machinists cranking out parts to 0.0001” all day long isn’t cheap either. ? Tony ? ? ? ? Hi All: ???? This person has done a lot of detail work in this report but from my 60 years of design, machining, and building things from small parts to a multi station paint line I fine that he is to broad in his statements. 1) CNC is more precise then manual machining.? Not true because parts can be hand lapped to millions of an inch and CNC does not machine that close. 2) CNC repair is not expensive.? Let him try and fine a cheap repair man to come 30 to 60 miles to study the problem and change the parts on a CNC machine that is not running right.? Or to change a chip shield that requires special tools to get to the screws that hold it in place. ???? I make these comment from personal experience. ????????????????????????????????????????????????? Bill Thomas ? On 2020-02-29 16:36, Queen Nanu wrote: Let's take a detailed look at the? ADVANTAGES OF CNC OVER CONVENTIONAL
|
Re: ReWET: [CAD-CAM-EDM-DRO] ADVANTAGES OF CNC OVER CONVENTIONAL
Try hand lapping anything but flat surfaces and make 1000 pieces per hour or mor manually. I had a customer that quoted milling on a 1/4 inch square circuit board and he had to do 25,000 of them so he quoted $25 each quote was accepted. He was amazed and made a vacuum table to hold the parts and was making $3500 per hour so 8 days later all the parts were done on a CNC try that manually.
toggle quoted message
Show quoted text
On Mar 1, 2020, at 11:37 AM, Tony Smith <ajsmith1968@...> wrote:
? I know that, but the person I was replied to didn’t mention microns, he said “be hand lapped to millions of an inch” ? The article didn’t mention CNCing to microns or millions of an inch, only 10,000ths. ? Tony ? ? ? ? To be fair, the article only claims accuracy for the CNC parts up to 0.0001”, ten thou not millionths. ? Having a bunch of machinists cranking out parts to 0.0001” all day long isn’t cheap either. ? Tony ? ? ? ? Hi All: ???? This person has done a lot of detail work in this report but from my 60 years of design, machining, and building things from small parts to a multi station paint line I fine that he is to broad in his statements. 1) CNC is more precise then manual machining.? Not true because parts can be hand lapped to millions of an inch and CNC does not machine that close. 2) CNC repair is not expensive.? Let him try and fine a cheap repair man to come 30 to 60 miles to study the problem and change the parts on a CNC machine that is not running right.? Or to change a chip shield that requires special tools to get to the screws that hold it in place. ???? I make these comment from personal experience. ????????????????????????????????????????????????? Bill Thomas ? On 2020-02-29 16:36, Queen Nanu wrote: Let's take a detailed look at the? ADVANTAGES OF CNC OVER CONVENTIONAL
|
Re: ReWET: [CAD-CAM-EDM-DRO] ADVANTAGES OF CNC OVER CONVENTIONAL
I know that, but the person I was replied to didn’t mention microns, he said “be hand lapped to millions of an inch” ? The article didn’t mention CNCing to microns or millions of an inch, only 10,000ths. ? Tony ? ?
toggle quoted message
Show quoted text
From: [email protected] [mailto:[email protected]] On Behalf Of Harko Schwartz
Sent: Monday, 2 March 2020 1:52 AM
To: [email protected]
Subject: Re: ReWET: [CAD-CAM-EDM-DRO] ADVANTAGES OF CNC OVER CONVENTIONAL? ? To be fair, the article only claims accuracy for the CNC parts up to 0.0001”, ten thou not millionths. ? Having a bunch of machinists cranking out parts to 0.0001” all day long isn’t cheap either. ? Tony ? ? ? ? Hi All: ???? This person has done a lot of detail work in this report but from my 60 years of design, machining, and building things from small parts to a multi station paint line I fine that he is to broad in his statements. 1) CNC is more precise then manual machining.? Not true because parts can be hand lapped to millions of an inch and CNC does not machine that close. 2) CNC repair is not expensive.? Let him try and fine a cheap repair man to come 30 to 60 miles to study the problem and change the parts on a CNC machine that is not running right.? Or to change a chip shield that requires special tools to get to the screws that hold it in place. ???? I make these comment from personal experience. ????????????????????????????????????????????????? Bill Thomas ? On 2020-02-29 16:36, Queen Nanu wrote: Let's take a detailed look at the? ADVANTAGES OF CNC OVER CONVENTIONAL
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ReWET: [CAD-CAM-EDM-DRO] ADVANTAGES OF CNC OVER CONVENTIONAL
CNC machines can be designed to produce parts to 1mm accuracy, or 10nm accuracy or better. Designed according to task, and priced accordingly.
But then they can do it all day and all night long.?
Humans are only useful at machining or finishing parts(laboriously) where the CNC machine used wasn't ideal for the task, ie one with insufficient accuracy.
In a debate like this, it would be more appropriate to select a task, and then decide if CNC or manual machining is better suited.
Roland
On Sun, 1 Mar 2020 at 16:52, Harko Schwartz < ncmeinc@...> wrote: .0001 = 2.54 microns
To be fair, the article only claims accuracy for the CNC parts up to 0.0001”, ten thou not millionths. ? Having a bunch of machinists cranking out parts to 0.0001” all day long isn’t cheap either. ? Tony ? ? ? ? Hi All: ???? This person has done a lot of detail work in this report but from my 60 years of design, machining, and building things from small parts to a multi station paint line I fine that he is to broad in his statements. 1) CNC is more precise then manual machining.? Not true because parts can be hand lapped to millions of an inch and CNC does not machine that close. 2) CNC repair is not expensive.? Let him try and fine a cheap repair man to come 30 to 60 miles to study the problem and change the parts on a CNC machine that is not running right.? Or to change a chip shield that requires special tools to get to the screws that hold it in place. ???? I make these comment from personal experience. ????????????????????????????????????????????????? Bill Thomas ? On 2020-02-29 16:36, Queen Nanu wrote: Let's take a detailed look at the? ADVANTAGES OF CNC OVER CONVENTIONAL
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Re: ReWET: [CAD-CAM-EDM-DRO] ADVANTAGES OF CNC OVER CONVENTIONAL
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To be fair, the article only claims accuracy for the CNC parts up to 0.0001”, ten thou not millionths. ? Having a bunch of machinists cranking out parts to 0.0001” all day long isn’t cheap either. ? Tony ? ? ? ? Hi All: ???? This person has done a lot of detail work in this report but from my 60 years of design, machining, and building things from small parts to a multi station paint line I fine that he is to broad in his statements. 1) CNC is more precise then manual machining.? Not true because parts can be hand lapped to millions of an inch and CNC does not machine that close. 2) CNC repair is not expensive.? Let him try and fine a cheap repair man to come 30 to 60 miles to study the problem and change the parts on a CNC machine that is not running right.? Or to change a chip shield that requires special tools to get to the screws that hold it in place. ???? I make these comment from personal experience. ????????????????????????????????????????????????? Bill Thomas ? On 2020-02-29 16:36, Queen Nanu wrote: Let's take a detailed look at the? ADVANTAGES OF CNC OVER CONVENTIONAL
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Re: ReWET: [CAD-CAM-EDM-DRO] ADVANTAGES OF CNC OVER CONVENTIONAL
To be fair, the article only claims accuracy for the CNC parts up to 0.0001”, ten thou not millionths. ? Having a bunch of machinists cranking out parts to 0.0001” all day long isn’t cheap either. ? Tony ? ? ?
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From: [email protected] [mailto:[email protected]] On Behalf Of idea2man
Sent: Sunday, 1 March 2020 6:12 PM
To: [email protected]
Subject: ReWET: [CAD-CAM-EDM-DRO] ADVANTAGES OF CNC OVER CONVENTIONAL? Hi All: ???? This person has done a lot of detail work in this report but from my 60 years of design, machining, and building things from small parts to a multi station paint line I fine that he is to broad in his statements. 1) CNC is more precise then manual machining.? Not true because parts can be hand lapped to millions of an inch and CNC does not machine that close. 2) CNC repair is not expensive.? Let him try and fine a cheap repair man to come 30 to 60 miles to study the problem and change the parts on a CNC machine that is not running right.? Or to change a chip shield that requires special tools to get to the screws that hold it in place. ???? I make these comment from personal experience. ????????????????????????????????????????????????? Bill Thomas ? On 2020-02-29 16:36, Queen Nanu wrote: Let's take a detailed look at the? ADVANTAGES OF CNC OVER CONVENTIONAL
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ReWET: [CAD-CAM-EDM-DRO] ADVANTAGES OF CNC OVER CONVENTIONAL
Hi All:
???? This person has done a lot of detail work in this report but from
my 60 years of design, machining, and building things from small parts
to a multi station paint line I fine that he is to broad in his statements.
1) CNC is more precise then manual machining.? Not true because parts
can be hand lapped to millions of an inch and CNC does not machine that
close.
2) CNC repair is not expensive.? Let him try and fine a cheap repair man
to come 30 to 60 miles to study the problem and change the parts on
a CNC machine that is not running right.? Or to change a chip shield that
requires special tools to get to the screws that hold it in place.
???? I make these comment from personal experience.
????????????????????????????????????????????????? Bill Thomas
?
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Show quoted text
On 2020-02-29 16:36, Queen Nanu wrote:
?
Let's take a detailed look at the?
ADVANTAGES OF CNC OVER CONVENTIONAL
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