GearHeads Forum

Thank you Art,
And I did figure out changing the dp for different sizing.
Scott

Scott:

  You may be better off holding on a day or two, its looking like the new routines will be out within 2-3 days, so youll have amuch easier time seeing what you get, and creating
paths in various ways. Its easier to see if a tool is too large, and to see why a path may be messing up.

The video I posted was an early test of the simulation showing the generated paths, so by end of week at the latest you should be able to do it yourself.. I know the old
routines are very hard to see and very bad to follow , which is why the new routines are being developed. So rather than fight whatever the issue is, I suggest you take a break for a couple of days, Im just completing the GCode output section, the paths are all working fine at the moment, Im betting your problem will go away, or at least show
us whats up when you get your hands on the new code. I expect Ill be doing a video shortly on its usage..

Art

Art,
I viewed the video and see how it should look. That is not what I am getting. The first move for the A axis rotates a little beyond the profiling area and makes a full depth of cut pass that wipes out that side of the tooth profile alltogether. I did as you suggetsted and ran the roughing cut only and that worked just as it should roughing out all the teeth. It is the shaving that is messed up. I even tried reversing my Y axis thinking it may be the problem I ran the rotary in both directions with Y set one way and both with Y set the other. All ways wipe out the profile as soon as A starts its rotation process. This is a small count gear at 11 teeth. I will try a larger tooth count to see if that works? On another subject, can the involute settings be changed to match a cutter for a smaller tooth involute set ? If so is there a tutorial that addresses this as I cannot find anywhere to change from the one that comes with gearotic.

Thanks,
Scott

Scott:

  The new version isnt ready yet, but here s a short video from it showing how the cutting "should" look when your looking into the 4th axis..

https://www.youtube.com/watch?v=TpbjYPV ... e=youtu.be

  The pauses are the tool sweep back, then forward on the tooth surface.. but this shows at least the order of motion vs revolution ..

While this is the new code, the old code is similar...though during this development I have found an error in the old code that coudl badly affect small tooth count gears,
the new module will correct that..

Art

I will try this out over the weekend and see what I can learn. Thanks for your patience and help.
Scorr

Scott:

  Try one step at a time, turn off tangental and just turn on rooting.. does that cut properly ( though teeth have raggen edges? )

Lets see if we can g=figure out what step its screwing up on..

Art

  Generally, when cutting involutes, if the Tool moves to one side of the blank, then the rotation thats next or mixed with that move will rotate the blank towards
that same side.. Does it seem reversed to that? In other words it always with the top moving towards the side the toolbiot has moved to..

Art


Art

I did reverse the rotary direction but it did not solve the problem. It still cuts wrong at the first rotary movement. I will double check that it is moving 360 degrees on the corresponding command and double check my gear blank sizing.

Thanks for your help.
Scott

Why don't you just reverse the direction of the motor in Mach3?
Dan

Scott Pancheau wrote: Art,
I did not even think of that as a possibility. If I am correctly understanding your description then I think my rotary is turning the wrong way. I will swap it around tonight and then get back. Thank you so much for your help. On that vein - this is a home made gantry and I have it set up such that the X axis moves toward the rotary when moving in + direction. Is that correct for the way code is written ?

Thank you
Scott

Scott:

  The default code is written for the chuck being in the X-- direction.. But in the options you can select the direction you face.

Its not unusual for the rotary to be backwards, few peopel follow the spec for that and youd only really notice on gear cutting.

Art

Art,
I did not even think of that as a possibility. If I am correctly understanding your description then I think my rotary is turning the wrong way. I will swap it around tonight and then get back. Thank you so much for your help. On that vein - this is a home made gantry and I have it set up such that the X axis moves toward the rotary when moving in + direction. Is that correct for the way code is written ?

Thank you
Scott