Dr.Al
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Do let me know if you spot any mistakes!
- Thread starter God mode restorations
- Start date
Do let me know if you spot any mistakes!
Agroshield
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There is little point in going to splines. If someone is going to use the dxf for cutting a gear on a CNC machine, the G-code that the machine accepts only understands straight lines and circular arcs. So whatever mathematical representation of the involute you use, it will be converted to one of those in the CAM.
A very good addition to the program would be the ability to produce a dxf of a pitch-shifted gear, so you can alter centres or have different size gears meshing on the same centres (this is how the Gamet dual dials work - a 125 and 127 internal gear, but cut on the same pitch circle. It can also be used to make a metric thread dial easier to use; a 35t and 36t gear cut on the same pitch circle). Look on khkgears site for info. on pitch shifting, and being Japanese, they use metric units so your blood pressure will remain steady.
Thank you
That will be very useful
If you ever write one for bike sprockets it’s would also be handyI’ve often wondered what a plasma one would be like vs a shop bought one. Obviously you’d have to profile it a bit on the lathe but a few afternoons at the mx track buggers them so the ability to cut my own would be damn handy.
Are you aware of the document here: https://gizmology.net/sprockets.htm that shows you how do draw one in CAD. See also: https://sprocketeer.software.informer.com/2.0/
James1979
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I was not but I am now thank you very much.
Dr.Al
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If I'm completely honest, the desire for splines is more about getting a slightly prettier 3D model. I really hope no-one uses my generated DXFs to drive CAM (or at least I hope they don't blame me if it's wrong!). When you extrude a polyline from a DXF into a 3D object (at least in the two CAD applications I tested), you end up with lines along the extrude at each point on the polyline; a spline would remove those lines.
Isn't "pitch shifting" the same thing as "profile shifting" (which is already supported). If not, I obviously need to do more reading!
Onoff
In the land of the unfinished project I am King!
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Ready for the next one once the copper pipe has stuck to the cross members. Cleaned the mould out and re-siliconed the internal corners:
Found a bit of slightly bigger mesh than before, not galvanised, so gave it a quick coat of zinc spray.
Sand and dye already in the mixer:
Cement and lime measured out ready.
Found a bit of slightly bigger mesh than before, not galvanised, so gave it a quick coat of zinc spray.
Sand and dye already in the mixer:
Cement and lime measured out ready.
selectedgrub
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The start of some R2D2 legs 
DennisCA
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Rebuilt my forge, no longer has a chimney. I found that coke smokes so little, not at all really, that I don't need it for outdoor forgning. The earlier design prevented access from all sides as well. Now I can put in a long piece of stock easily.
What it looked like before:
What it looked like before:
Last edited:
Onoff
In the land of the unfinished project I am King!
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Second one done. Used the orbital sander against the sides to vibrate it down this time.
Typically I did only 75% of last time's mix (when I had too much left over) and this time was a bit short! Scraped to the sides and filled the hollow in the middle with a nom. 4:1 mix, no lime, no dye, just whatever it picked up from the drum. Was a bit sloppy tbh. Fingers crossed!
Typically I did only 75% of last time's mix (when I had too much left over) and this time was a bit short! Scraped to the sides and filled the hollow in the middle with a nom. 4:1 mix, no lime, no dye, just whatever it picked up from the drum. Was a bit sloppy tbh. Fingers crossed!
Onoff
In the land of the unfinished project I am King!
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You believe in Karma like me then. What goes around comes around is the hope.
Memmeddu
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Yes I do
I'm more like about
"God is always with you.
Loves you.
God Put you towards obstacles to don't lost faith .
That's discipline,faith ,it will make you a better person.
A day you'll receive your reward and peoples around you will appreciate you and your struggles.
If you make good you'll receive it back.
If you make bad you'll receive it back as well."
Nick Rivera Caminero aka Nicky Jam
But yes karma do exist I believe .
If I'm mistaken I think that at least someone will remember me as a nice person
Ps sorry for the semi religious thing ,not meant to offend anyone over here , essentially all religions teach love towards others people's so nothing bad in what I wrote I believe.
Olderisbetter
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It looks great but what is it for?
Onoff
In the land of the unfinished project I am King!
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- Sevenoaks, UK
Olderisbetter
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Makes sense now
Memmeddu
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Drive my car after almost a month .
Much longer gears ,much more power.
I've also had to disable steering assist (electronic servoassist) because way to light compared to the other car I was driving.
I have to delete throttle pedal for a while driving it like the other is way too fast
Traumatic , I'm almost scared about sitting in my car
Much longer gears ,much more power.
I've also had to disable steering assist (electronic servoassist) because way to light compared to the other car I was driving.
I have to delete throttle pedal for a while driving it like the other is way too fast
Traumatic , I'm almost scared about sitting in my car
Seadog
Save the planet. It's the only one with rum!
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I modified some grease nipples for a modification that I intend doing to my mill drill i.e. positive lubrication to the feed screw nuts. The X axis one is completely bug shot, so when I get around to making a replacement the mod will be implemented.
I'm using air control line, which is very rigid so may or may not need to use clips. I've a supply of Oetikers ready, just in case.
I'm using air control line, which is very rigid so may or may not need to use clips. I've a supply of Oetikers ready, just in case.
Pete.
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Profile shifting should be automatic for small tooth counts, depending on the actual tooth count. There is a table that defines what the shift to long addendum should be in Machinery's Handbook.
slim_boy_fat
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Sorry if you've posted them and I've missed/forgotten the post(s) 
