Re: ELS 1mm thread, should I use capture nuts both sides of the XY/XZ assembly
John, Add the CNC # please. Dom
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Re: ELS 1mm thread, should I use capture nuts both sides of the XY/XZ assembly
The lead screw, 10mm rod and lm10uu bearings are what drive, support each axis, y has two one either side of the gantry x axis where a 700W router sits on the z axis.
?
Steppers are NEMA 17, 0.9' degree, about 2amp capable but drivers are simple polou on a RAMPS 1.4.
?
The screws are dual thread if that helps. Yes threaded rod to stepper couplers are flexible but might need to keep and eye on that.
?
Right now just collecting bits hence doesn't have bed yet etc. loosely about 500mm x 600mm bed size, c70mm z travel.
?
This is a CNC not a printer.
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Re: ELS 1mm thread, should I use capture nuts both sides of the XY/XZ assembly
Thanks.? Makes sense.? Nicely done. John ?
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From: digitalhobbyist@groups.io [mailto:digitalhobbyist@groups.io] On Behalf Of John Lindo
Sent: August 10, 2024 9:47 PM
To: digitalhobbyist@groups.io
Subject: Re: [digitalhobbyist] ELS 1mm thread, should I use capture nuts both sides of the XY/XZ assembly? Just added a few photos of the frame and usage of a Dial Indicator to check bed levelling into the DH files section. I hope this clarifies things. Basically send the printer to home, disengage the stepper drives and to check X move the indicator along the X rail,? to check Y, position the the DI in several locations and move the Y table.
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Re: ELS 1mm thread, should I use capture nuts both sides of the XY/XZ assembly
Hi John D
?
Just added a few photos of the frame and usage of a Dial Indicator to check bed levelling into the DH files section.
I hope this clarifies things.
Basically send the printer to home, disengage the stepper drives and to check X move the indicator along the X rail,?
to check Y, position the the DI in several locations and move the Y table.
?
Thanks
--
John
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Added Folder /3D Printer bed leveling dial indicator
#file-notice
John Lindo <bechetboat@...> added folder /3D Printer bed leveling dial indicator
Description:
Used to check the bed levelling.
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Re: ELS 1mm thread, should I use capture nuts both sides of the XY/XZ assembly
It’s best to capture the leadscrew to keep it stabilized.? Some folks don’t capture the lead screw and wonder why circles aren’t round. Have A Great Day?? Tracy Ranson
Hi all,
?
First post... and I ask a question...
?
ELS T8-1mm thread on the homemade CNC, should I use capture nuts both sides of the XY/XZ? assembly?
?
They say photo worth a 1,000 words so see attached. Should I use one side only or both? Obviously will be secured so the rotation os the stepper leads to linear motion.
?
Intention is mill, wood and plastic not metal to this is strong enough.
?
Regards,
?
Dominic
|
Re: ELS 1mm thread, should I use capture nuts both sides of the XY/XZ assembly
Hey john So it just hangs on the rails?? You then move the table in the Y direction a bit at a time and manually slide your probe back and forth?? Or do you just go to the front and back and slide it back and forth. John ?
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From: digitalhobbyist@groups.io [mailto:digitalhobbyist@groups.io] On Behalf Of John Lindo
Sent: August 10, 2024 12:16 PM
To: digitalhobbyist@groups.io
Subject: Re: [digitalhobbyist] ELS 1mm thread, should I use capture nuts both sides of the XY/XZ assembly? ?I personally found that the anti backlash nuts worked good. I had a bit of a job to "sync" the main M8 nut to the anti backlash nut the first time around, but got the hang of it. The new Geeetech Mizar S 3D printers have the anti backlash nuts fitted as standard. The Mizar S 255 x 255 bed and 250 Z, auto levelling, magnetic bed plate,? etc etc etc, I just LUV this machine, and for the selling price now equal to a night out at Mc Donald's with a kids and parents. Again, I use a a default setting in Prusa slicer of filament reattraction and Z lift when crossing perimeters and layer changes. These settings certainly help me eliminating 98% of the angel hairs when printing complex parts. The photo shows my old Geeetech Prusa I3 lone, I built a Dial Indicator bracket that slipped over the X axis slide rod.to accurately dial in the table flatness
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Re: ELS 1mm thread, should I use capture nuts both sides of the XY/XZ assembly
?I personally found that the anti backlash nuts worked good.
I had a bit of a job to "sync" the main M8 nut to the anti backlash nut the first time around, but got the hang of it.
The new Geeetech Mizar S 3D printers have the anti backlash nuts fitted as standard. The Mizar S 255 x 255 bed and 250 Z, auto levelling, magnetic bed plate,?
etc etc etc, I just LUV this machine, and for the selling price now equal to a night out at Mc Donald's with a kids and parents.
Again, I use a a default setting in Prusa slicer of filament reattraction and Z lift when crossing perimeters and layer changes.
These settings certainly help me eliminating 98% of the angel hairs when printing complex parts.
The photo shows my old Geeetech Prusa I3 lone, I built a Dial Indicator bracket that slipped over the X axis slide rod.to accurately dial in the table flatness
in X and Y.
Cheers
?
John
?
?
?
?
?
?
--
John
|
Re: ELS 1mm thread, should I use capture nuts both sides of the XY/XZ assembly
Hi Dominic, Thanks for your first post, you now have been unmoderated.?
Please try and use the HASHTAG # format? where ever possible. This keeps subject posts filed all neat and tidy
If you do not see a relevant # to your posts then please yell out and I will oblige to slip one in.
?
Seems like you are using typical 3D printer rods and T8 mm screws, are they single or multi start??
Have you considered fitting anti backlash screws, as I think they are of benefit to 3D?
printing if members like me, use the nozzle lift and filament retraction functions regularly and I could see a benefit for you
in any axis travel of your ELS machine. You must also be using Oldham (FLEX) couplings but they not visible in your recent photos.
Thanks
John Spain.
Owner.
?
--
John
|
Re: ELS 1mm thread, should I use capture nuts both sides of the XY/XZ assembly
I would think that redundancy would be yer friend , I just
checked & their on both sides whenever they would fit in my
cheap 3D printer clone .
animal
On 8/10/24 6:18 AM, Dom Baines M1KTA
via groups.io wrote:
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Show quoted text
Hi all,
?
First post... and I ask a question...
?
ELS T8-1mm thread on the homemade CNC, should I use capture
nuts both sides of the XY/XZ? assembly?
?
They say photo worth a 1,000 words so see attached. Should I
use one side only or both? Obviously will be secured so the
rotation os the stepper leads to linear motion.
?
Intention is mill, wood and plastic not metal to this is
strong enough.
?
Regards,
?
Dominic
|
ELS 1mm thread, should I use capture nuts both sides of the XY/XZ assembly
Hi all,
?
First post... and I ask a question...
?
ELS T8-1mm thread on the homemade CNC, should I use capture nuts both sides of the XY/XZ? assembly?
?
They say photo worth a 1,000 words so see attached. Should I use one side only or both? Obviously will be secured so the rotation os the stepper leads to linear motion.
?
Intention is mill, wood and plastic not metal to this is strong enough.
?
Regards,
?
Dominic
|
That sounds right! I've not actually needed an o'scope since I left for Germany, but wanted one several times. Accumulated the stuff to put a smallish 'tronics workbench together but not actually done it. Bought a light duty rework station for SMT boards some years back, and it only worked one time...
Was dead the next time I plugged it in. Set all the other stuff aside because I already had too many hobbies going, and had just started the machine shop class. Another thing for The Tomorrow File.
Bill in OKC?
William R. Meyers, MSgt, USAF(Ret.)
Aphorisms to live by: Good judgement comes from experience. Experience comes from bad judgement.? SEMPER GUMBY!
Expect in one hand, expectorate in the other. See which one gets full first.
On Sunday, June 23, 2024 at 11:37:09 PM CDT, mike allen <animal@...> wrote:
Thanks John , have a set comin , be here when i get out of the
hospital . Caps is a good place to start Bill , also cold solder
joints . They put handles on scopes not for carrying them their
for slamming them down on a bench . They also use several
different voltages in these units . Fortunately I was able to find
a service manual yesterday . but if I don't get anywhere following
the flow chart I'll just put the cover back on & call it a
single channel scope . Bill yer scope may be a BK Precision ?
animal
|
Thanks John , have a set comin , be here when i get out of the
hospital . Caps is a good place to start Bill , also cold solder
joints . They put handles on scopes not for carrying them their
for slamming them down on a bench . They also use several
different voltages in these units . Fortunately I was able to find
a service manual yesterday . but if I don't get anywhere following
the flow chart I'll just put the cover back on & call it a
single channel scope . Bill yer scope may be a BK Precision ?
animal
On 6/23/24 1:51 PM, Bill in OKC too via
groups.io wrote:
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Show quoted text
Mike, pretty sure I got mine from pomonaelectronics.com.
probably not as cheap as Amazon, but should be better
quality. Might also check out jameco.com, or Mouser
electronics. Haven't used them recently, so don't have their
URL anymore.?
My scope isn't a Tek, as that one was huge & heavy,
so it got sold before I left SC in 1991 on my way to
Germany. Starts with a B, and was a third the size of the
old Tek...
It's in the cabinet under my reloading bench. It won't
power up now. Expect I need to replace all the capacitors.
Was a pretty nice scope when I got it from my FIL way back
when. It's in the Tomorrow File.
Bill in OKC?
William R.
Meyers, MSgt, USAF(Ret.)
Aphorisms
to live by:
Good judgement comes from experience.
Experience comes from bad judgement.?
SEMPER GUMBY!
Improvise,
Adapt, and Overcome.
Physics
doesn't care about your schedule.
The
only reason I know anything is because I've done
it wrong enough times to START to know better.
Expect
in one hand, expectorate in the other. See
which one gets full first.
On Sunday, June 23, 2024 at 01:06:15 PM CDT, mike allen
<animal@...> wrote:
hey folks . I have a new to me Tek T922 scope
that came with no probes .
It seems that my ex bud that returned my Hp
scope not working also
forgot to tell me he managed to break the
tips on all my Tektronix
probes that were in the pouch . There seems
to be (of course ) plenty on
Amazon & just wondering if anyone here
has bought any probes from Amazon
& if the were happy with them or not
& which ones they got .
The New Tek work's very well on one channel
so I got some trouble
shootin coming up around the bend . The Crt
is crisp & ya don't have to
crank up the intensity to se the trace which
is always good
thanks
animal
|
Mike, pretty sure I got mine from pomonaelectronics.com. probably not as cheap as Amazon, but should be better quality. Might also check out jameco.com, or Mouser electronics. Haven't used them recently, so don't have their URL anymore.?
My scope isn't a Tek, as that one was huge & heavy, so it got sold before I left SC in 1991 on my way to Germany. Starts with a B, and was a third the size of the old Tek...
It's in the cabinet under my reloading bench. It won't power up now. Expect I need to replace all the capacitors. Was a pretty nice scope when I got it from my FIL way back when. It's in the Tomorrow File.
Bill in OKC?
William R. Meyers, MSgt, USAF(Ret.)
Aphorisms to live by: Good judgement comes from experience. Experience comes from bad judgement.? SEMPER GUMBY!
Expect in one hand, expectorate in the other. See which one gets full first.
On Sunday, June 23, 2024 at 01:06:15 PM CDT, mike allen <animal@...> wrote:
hey folks . I have a new to me Tek T922 scope that came with no probes .
It seems that my ex bud that returned my Hp scope not working also
forgot to tell me he managed to break the tips on all my Tektronix
probes that were in the pouch . There seems to be (of course ) plenty on
Amazon & just wondering if anyone here has bought any probes from Amazon
& if the were happy with them or not & which ones they got .
The New Tek work's very well on one channel so I got some trouble
shootin coming up around the bend . The Crt is crisp & ya don't have to
crank up the intensity to se the trace which is always good
thanks
animal
|
As long as you have probes with the bandwidth you need, I have found they work as expected. The brand I bought was RioRand. I imagine that all of the ones with the same coloration and images in the product page are probably made in the same factory.
Of course, remember to trim the probe (screw cap on BNC end) with the reference signal on the scope.
hey folks . I have a new to me Tek T922 scope that came with no probes .
It seems that my ex bud that returned my Hp scope not working also
forgot to tell me he managed to break the tips on all my Tektronix
probes that were in the pouch . There seems to be (of course ) plenty on
Amazon & just wondering if anyone here has bought any probes from Amazon
& if the were happy with them or not & which ones they got .
The New Tek work's very well on one channel so I got some trouble
shootin coming up around the bend . The Crt is crisp & ya don't have to
crank up the intensity to se the trace which is always good
thanks
animal
--
Buffalo John
|
hey folks . I have a new to me Tek T922 scope that came with no probes . It seems that my ex bud that returned my Hp scope not working also forgot to tell me he managed to break the tips on all my Tektronix probes that were in the pouch . There seems to be (of course ) plenty on Amazon & just wondering if anyone here has bought any probes from Amazon & if the were happy with them or not & which ones they got .
The New Tek work's very well on one channel so I got some trouble shootin coming up around the bend . The Crt is crisp & ya don't have to crank up the intensity to se the trace which is always good
thanks
animal
|
Re: #CNC gear cutting
#CNC
John D Thanks for a concise answer. ?
John L
It’s been 13 years.? Let’s see if I can remember.? Each turn of the stepper motor is 10 degrees or 160 steps per degree.? For 13 divisions in a circle we need 27.69230769230769 degrees or 4430.769230769231 steps.? But that’s a hard number to figure out. ? Distances on the ELS are set up as Motor steps per rev and lead screw pitch and finally distance per jog button. ? So 1600 steps per rev is fixed by the micro-stepping driver.? One revolution means 10 degrees on my rotary table so I’ll call that a Pitch of 10 TPI or 0.1” per rev or 0.01” per degree since one turn is 10 degrees. ? I have to move 360/13 for every jog so that’s 27.69230769230769 ?degrees. ??Multiply that by our 0.01” per degree and I enter into the jog distance 0.2769” which is the maximum resolution I’m allowed for entering numbers; not need to round up.? Once the enter key is tapped it shows to 3 digits or 0.277 but internally is still 0.2769” per jog press. ? With the table set at 0 then pressing the jog button 13 times brings me back around to 3.599 on the display.? ?The marks on the rotary table look like they are at exactly 0 again.? I think from a cumulative perspective over many turns the error would add up.? On one turn I doubt we’d see a difference. ? A test might be to use a gear cutter on a disk to cut 13 slots.? Then couple that to an encoder with 1000 lines or 4000 edges per rev.? Then measure the gap and tooth width in encoder counts. ? Then do the same thing with the arm and disks etc. the old fashioned way on a rotary table.? My guess is my rotary table (made in India) likely has imperfections in the worm and drive gear and the errors wouldn’t be any different. ? John Dammeyer ? ? ? ? ? ? Understand, but if you needed 13 divisions?? -------- Original message -------- Date: 5/16/24 07:09 (GMT+01:00) Subject: Re: [digitalhobbyist] #CNC gear cutting I took the easy route 13 years ago.? My ELS has the stepper motor drivers inside.? I connected to the rotary axis motor and configured the Lathe Z Axis parameters so each single jog step moved the number of degrees required for what I was doing.? When I was done I set the parameters back for the lathe and put it back on my South Bend. ?
? John Dammeyer ? ? This is similar to what I built, I attached a belt and pulley and not direct drive. The Arduino sketch composed by Gary Liming is the same. ? Cool thanks . I built one of the Arduino rotary tables from one of the forums but never got it to work , pretty sure it had something to do with my stepper driver boards , same thing with the L'il MaxNC that I tried to convert over to Arduino using a CNC shield . I wanted to get setup to make graduated dials , but last I looked into it Grbl didn't support a 4th axis . Mach3 just looks like it's too complicated for me at this stage . I do have the 4 nema 24 steppers that came with the Max, so I know that they are up to the task . thanks animal On 5/14/24 1:23 PM, John Lindo wrote: I have a mini Weiss 16AV mill that I fitted with Nema 23 steppers to the X Y Z and a homemade indexing?head that also has a Nema 23 that I use for the fourth A axis. The mill can be used for simple power feed from a control box connected to push button feeds and rapid mounted on the mill,? also a different separate set of cables to the steppers by the way of 4 x quick release plugs and these feed into a control?box (drivers etc) that receives info from a CNC DDCSV ver 2.1 box. Photo 1 CNC gear cutting. Photo 2 The Red box, Power feed unit with DM 542 steppers and power supply boxes, the box underneath? is the steppers and power supply for the CNC. Box boxes initially were originally tea storage boxes from a Chinese shop, the crystal glass was taken out and I replaced them with clear perspex.? No room in the workshop bench areas, so I have to use the walls and ceiling for any available space.LOL. Photos of power feed X Y Z operators controls. Photo of a homemade Arduino step indexing control box, It has several setting commands, set Ratio, (currently I use 1:1) IE 45T stepper 45T indexer, but I can select? 90:1 45:10 all depends on the project,? step Jog, Continual run, Angular moves per any full degree selected and a Division module. A very useful piece of kit in the armoury. I have the .ino code also a complete "how to" build info file. Hope all of you are interested. ? Nice Job ! This is why we do things like this , to see if we can . I forget what is yer CNC machine ? thanks animal On 5/14/24 10:51 AM, John Lindo wrote: Hi Mike and members.
Finally got there with the gear cutting of the 9 T chuck pinions, I think LOL.
Only cut one so far, but entering the pinion into the alloy chuck scroll ring/gear, the pinion rotates without?
any jamming etc. The acid test will be to cut the other 2 pinion blanks and see if they all marry up.
To remove the arrow head created by cutting down a cone, indexer set at 20 degrees, the gear cutter running down the front?
portion of cone IE parallel to the X axis, cut 9 divisions, 40 degrees rotation, thus creating the arrow head effect between the teeth.
See the 12 line handwritten g code, basically I? tell the machine to do a function, in this case repeat 9 times.
This is a very useful code for simple gear cutting.
Then with the MPG, CNC, manual pulse generator, hand wheel, rotated the A axis +4 degrees, set A to home 0 degrees and then ran the programme again,?
then with the MPG set? to -8 degrees , again reset? A to 0 and ran the programme again.?
I could of consolidated basically 3 programmes into 1 but decided not to risk scrapping the phosphor bronze.
I agree that there will be so many armchair engineers who will disagree with this approach to making basically an old mangle type set of bevel gears,
and yes the 2 cutter approach as seen in your video you attached is the way to go if it was a crown wheel and pinion set for a Formula one drive train.
but this works for me and I am confident that the next 2 pinions to be cut if I follow what I just did on the first one then I should be home and dry.?
see attachments.
--
John
--
John
--
John
|
Re: #CNC gear cutting
#CNC
It’s been 13 years.? Let’s see if I can remember.? Each turn of the stepper motor is 10 degrees or 160 steps per degree.? For 13 divisions in a circle we need 27.69230769230769 degrees or 4430.769230769231 steps.? But that’s a hard number to figure out. ? Distances on the ELS are set up as Motor steps per rev and lead screw pitch and finally distance per jog button. ? So 1600 steps per rev is fixed by the micro-stepping driver.? One revolution means 10 degrees on my rotary table so I’ll call that a Pitch of 10 TPI or 0.1” per rev or 0.01” per degree since one turn is 10 degrees. ? I have to move 360/13 for every jog so that’s 27.69230769230769 ?degrees. ??Multiply that by our 0.01” per degree and I enter into the jog distance 0.2769” which is the maximum resolution I’m allowed for entering numbers; not need to round up.? Once the enter key is tapped it shows to 3 digits or 0.277 but internally is still 0.2769” per jog press. ? With the table set at 0 then pressing the jog button 13 times brings me back around to 3.599 on the display.? ?The marks on the rotary table look like they are at exactly 0 again.? I think from a cumulative perspective over many turns the error would add up.? On one turn I doubt we’d see a difference. ? A test might be to use a gear cutter on a disk to cut 13 slots.? Then couple that to an encoder with 1000 lines or 4000 edges per rev.? Then measure the gap and tooth width in encoder counts. ? Then do the same thing with the arm and disks etc. the old fashioned way on a rotary table.? My guess is my rotary table (made in India) likely has imperfections in the worm and drive gear and the errors wouldn’t be any different. ? John Dammeyer ? ? ? ? ?
toggle quoted message
Show quoted text
From: digitalhobbyist@groups.io [mailto:digitalhobbyist@groups.io] On Behalf Of John Lindo
Sent: May 16, 2024 3:59 AM
To: digitalhobbyist@groups.io
Subject: Re: [digitalhobbyist] #CNC gear cutting? Understand, but if you needed 13 divisions?? -------- Original message -------- From: "John Dammeyer via groups.io" <johnd@...> Date: 5/16/24 07:09 (GMT+01:00) To: digitalhobbyist@groups.io Subject: Re: [digitalhobbyist] #CNC gear cutting I took the easy route 13 years ago.? My ELS has the stepper motor drivers inside.? I connected to the rotary axis motor and configured the Lathe Z Axis parameters so each single jog step moved the number of degrees required for what I was doing.? When I was done I set the parameters back for the lathe and put it back on my South Bend. ?
? John Dammeyer ? From: digitalhobbyist@groups.io [mailto:digitalhobbyist@groups.io] On Behalf Of John Lindo
Sent: May 15, 2024 9:07 PM
To: digitalhobbyist@groups.io
Subject: Re: [digitalhobbyist] #CNC gear cutting ? This is similar to what I built, I attached a belt and pulley and not direct drive. The Arduino sketch composed by Gary Liming is the same. ? Cool thanks . I built one of the Arduino rotary tables from one of the forums but never got it to work , pretty sure it had something to do with my stepper driver boards , same thing with the L'il MaxNC that I tried to convert over to Arduino using a CNC shield . I wanted to get setup to make graduated dials , but last I looked into it Grbl didn't support a 4th axis . Mach3 just looks like it's too complicated for me at this stage . I do have the 4 nema 24 steppers that came with the Max, so I know that they are up to the task . thanks animal On 5/14/24 1:23 PM, John Lindo wrote: I have a mini Weiss 16AV mill that I fitted with Nema 23 steppers to the X Y Z and a homemade indexing?head that also has a Nema 23 that I use for the fourth A axis. The mill can be used for simple power feed from a control box connected to push button feeds and rapid mounted on the mill,? also a different separate set of cables to the steppers by the way of 4 x quick release plugs and these feed into a control?box (drivers etc) that receives info from a CNC DDCSV ver 2.1 box. Photo 1 CNC gear cutting. Photo 2 The Red box, Power feed unit with DM 542 steppers and power supply boxes, the box underneath? is the steppers and power supply for the CNC. Box boxes initially were originally tea storage boxes from a Chinese shop, the crystal glass was taken out and I replaced them with clear perspex.? No room in the workshop bench areas, so I have to use the walls and ceiling for any available space.LOL. Photos of power feed X Y Z operators controls. Photo of a homemade Arduino step indexing control box, It has several setting commands, set Ratio, (currently I use 1:1) IE 45T stepper 45T indexer, but I can select? 90:1 45:10 all depends on the project,? step Jog, Continual run, Angular moves per any full degree selected and a Division module. A very useful piece of kit in the armoury. I have the .ino code also a complete "how to" build info file. Hope all of you are interested. ? Nice Job ! This is why we do things like this , to see if we can . I forget what is yer CNC machine ? thanks animal On 5/14/24 10:51 AM, John Lindo wrote: Hi Mike and members.
Finally got there with the gear cutting of the 9 T chuck pinions, I think LOL.
Only cut one so far, but entering the pinion into the alloy chuck scroll ring/gear, the pinion rotates without?
any jamming etc. The acid test will be to cut the other 2 pinion blanks and see if they all marry up.
To remove the arrow head created by cutting down a cone, indexer set at 20 degrees, the gear cutter running down the front?
portion of cone IE parallel to the X axis, cut 9 divisions, 40 degrees rotation, thus creating the arrow head effect between the teeth.
See the 12 line handwritten g code, basically I? tell the machine to do a function, in this case repeat 9 times.
This is a very useful code for simple gear cutting.
Then with the MPG, CNC, manual pulse generator, hand wheel, rotated the A axis +4 degrees, set A to home 0 degrees and then ran the programme again,?
then with the MPG set? to -8 degrees , again reset? A to 0 and ran the programme again.?
I could of consolidated basically 3 programmes into 1 but decided not to risk scrapping the phosphor bronze.
I agree that there will be so many armchair engineers who will disagree with this approach to making basically an old mangle type set of bevel gears,
and yes the 2 cutter approach as seen in your video you attached is the way to go if it was a crown wheel and pinion set for a Formula one drive train.
but this works for me and I am confident that the next 2 pinions to be cut if I follow what I just did on the first one then I should be home and dry.?
see attachments.
--
John
--
John
|
Re: #CNC gear cutting
#CNC
Understand, but if you needed 13 divisions?? John
toggle quoted message
Show quoted text
-------- Original message -------- From: "John Dammeyer via groups.io" <johnd@...> Date: 5/16/24 07:09 (GMT+01:00) To: digitalhobbyist@groups.io Subject: Re: [digitalhobbyist] #CNC gear cutting
I took the easy route 13 years ago.? My ELS has the stepper motor drivers inside.? I connected to the rotary axis motor and configured the Lathe Z Axis parameters so each single jog step moved the number of degrees required for what I was doing.? When I was done I set the parameters back for the lathe and put it back on my South Bend. ?
? John Dammeyer ? From: digitalhobbyist@groups.io [mailto:digitalhobbyist@groups.io] On Behalf Of John Lindo
Sent: May 15, 2024 9:07 PM
To: digitalhobbyist@groups.io
Subject: Re: [digitalhobbyist] #CNC gear cutting ? This is similar to what I built, I attached a belt and pulley and not direct drive. The Arduino sketch composed by Gary Liming is the same. ? Cool thanks . I built one of the Arduino rotary tables from one of the forums but never got it to work , pretty sure it had something to do with my stepper driver boards , same thing with the L'il MaxNC that I tried to convert over to Arduino using a CNC shield . I wanted to get setup to make graduated dials , but last I looked into it Grbl didn't support a 4th axis . Mach3 just looks like it's too complicated for me at this stage . I do have the 4 nema 24 steppers that came with the Max, so I know that they are up to the task . thanks animal On 5/14/24 1:23 PM, John Lindo wrote: I have a mini Weiss 16AV mill that I fitted with Nema 23 steppers to the X Y Z and a homemade indexing?head that also has a Nema 23 that I use for the fourth A axis. The mill can be used for simple power feed from a control box connected to push button feeds and rapid mounted on the mill,? also a different separate set of cables to the steppers by the way of 4 x quick release plugs and these feed into a control?box (drivers etc) that receives info from a CNC DDCSV ver 2.1 box. Photo 1 CNC gear cutting. Photo 2 The Red box, Power feed unit with DM 542 steppers and power supply boxes, the box underneath? is the steppers and power supply for the CNC. Box boxes initially were originally tea storage boxes from a Chinese shop, the crystal glass was taken out and I replaced them with clear perspex.? No room in the workshop bench areas, so I have to use the walls and ceiling for any available space.LOL. Photos of power feed X Y Z operators controls. Photo of a homemade Arduino step indexing control box, It has several setting commands, set Ratio, (currently I use 1:1) IE 45T stepper 45T indexer, but I can select? 90:1 45:10 all depends on the project,? step Jog, Continual run, Angular moves per any full degree selected and a Division module. A very useful piece of kit in the armoury. I have the .ino code also a complete "how to" build info file. Hope all of you are interested. ? Nice Job ! This is why we do things like this , to see if we can . I forget what is yer CNC machine ? thanks animal On 5/14/24 10:51 AM, John Lindo wrote: Hi Mike and members.
Finally got there with the gear cutting of the 9 T chuck pinions, I think LOL.
Only cut one so far, but entering the pinion into the alloy chuck scroll ring/gear, the pinion rotates without?
any jamming etc. The acid test will be to cut the other 2 pinion blanks and see if they all marry up.
To remove the arrow head created by cutting down a cone, indexer set at 20 degrees, the gear cutter running down the front?
portion of cone IE parallel to the X axis, cut 9 divisions, 40 degrees rotation, thus creating the arrow head effect between the teeth.
See the 12 line handwritten g code, basically I? tell the machine to do a function, in this case repeat 9 times.
This is a very useful code for simple gear cutting.
Then with the MPG, CNC, manual pulse generator, hand wheel, rotated the A axis +4 degrees, set A to home 0 degrees and then ran the programme again,?
then with the MPG set? to -8 degrees , again reset? A to 0 and ran the programme again.?
I could of consolidated basically 3 programmes into 1 but decided not to risk scrapping the phosphor bronze.
I agree that there will be so many armchair engineers who will disagree with this approach to making basically an old mangle type set of bevel gears,
and yes the 2 cutter approach as seen in your video you attached is the way to go if it was a crown wheel and pinion set for a Formula one drive train.
but this works for me and I am confident that the next 2 pinions to be cut if I follow what I just did on the first one then I should be home and dry.?
see attachments.
--
John
-- John
|
Re: #CNC gear cutting
#CNC
I took the easy route 13 years ago.? My ELS has the stepper motor drivers inside.? I connected to the rotary axis motor and configured the Lathe Z Axis parameters so each single jog step moved the number of degrees required for what I was doing.? When I was done I set the parameters back for the lathe and put it back on my South Bend. ?
? John Dammeyer ?
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From: digitalhobbyist@groups.io [mailto:digitalhobbyist@groups.io] On Behalf Of John Lindo
Sent: May 15, 2024 9:07 PM
To: digitalhobbyist@groups.io
Subject: Re: [digitalhobbyist] #CNC gear cutting? This is similar to what I built, I attached a belt and pulley and not direct drive. The Arduino sketch composed by Gary Liming is the same. ? Cool thanks . I built one of the Arduino rotary tables from one of the forums but never got it to work , pretty sure it had something to do with my stepper driver boards , same thing with the L'il MaxNC that I tried to convert over to Arduino using a CNC shield . I wanted to get setup to make graduated dials , but last I looked into it Grbl didn't support a 4th axis . Mach3 just looks like it's too complicated for me at this stage . I do have the 4 nema 24 steppers that came with the Max, so I know that they are up to the task . thanks animal On 5/14/24 1:23 PM, John Lindo wrote: I have a mini Weiss 16AV mill that I fitted with Nema 23 steppers to the X Y Z and a homemade indexing?head that also has a Nema 23 that I use for the fourth A axis. The mill can be used for simple power feed from a control box connected to push button feeds and rapid mounted on the mill,? also a different separate set of cables to the steppers by the way of 4 x quick release plugs and these feed into a control?box (drivers etc) that receives info from a CNC DDCSV ver 2.1 box. Photo 1 CNC gear cutting. Photo 2 The Red box, Power feed unit with DM 542 steppers and power supply boxes, the box underneath? is the steppers and power supply for the CNC. Box boxes initially were originally tea storage boxes from a Chinese shop, the crystal glass was taken out and I replaced them with clear perspex.? No room in the workshop bench areas, so I have to use the walls and ceiling for any available space.LOL. Photos of power feed X Y Z operators controls. Photo of a homemade Arduino step indexing control box, It has several setting commands, set Ratio, (currently I use 1:1) IE 45T stepper 45T indexer, but I can select? 90:1 45:10 all depends on the project,? step Jog, Continual run, Angular moves per any full degree selected and a Division module. A very useful piece of kit in the armoury. I have the .ino code also a complete "how to" build info file. Hope all of you are interested. ? Nice Job ! This is why we do things like this , to see if we can . I forget what is yer CNC machine ? thanks animal On 5/14/24 10:51 AM, John Lindo wrote: Hi Mike and members.
Finally got there with the gear cutting of the 9 T chuck pinions, I think LOL.
Only cut one so far, but entering the pinion into the alloy chuck scroll ring/gear, the pinion rotates without?
any jamming etc. The acid test will be to cut the other 2 pinion blanks and see if they all marry up.
To remove the arrow head created by cutting down a cone, indexer set at 20 degrees, the gear cutter running down the front?
portion of cone IE parallel to the X axis, cut 9 divisions, 40 degrees rotation, thus creating the arrow head effect between the teeth.
See the 12 line handwritten g code, basically I? tell the machine to do a function, in this case repeat 9 times.
This is a very useful code for simple gear cutting.
Then with the MPG, CNC, manual pulse generator, hand wheel, rotated the A axis +4 degrees, set A to home 0 degrees and then ran the programme again,?
then with the MPG set? to -8 degrees , again reset? A to 0 and ran the programme again.?
I could of consolidated basically 3 programmes into 1 but decided not to risk scrapping the phosphor bronze.
I agree that there will be so many armchair engineers who will disagree with this approach to making basically an old mangle type set of bevel gears,
and yes the 2 cutter approach as seen in your video you attached is the way to go if it was a crown wheel and pinion set for a Formula one drive train.
but this works for me and I am confident that the next 2 pinions to be cut if I follow what I just did on the first one then I should be home and dry.?
see attachments.
--
John
|
John Lindo
T
Bill in OKC too
BuffaloJohn