Release of Dev Version 4.21

[ArtF]

Hi Guys:

  4.21 is online, in it, any shafting issues with escapemen ts should be gone, as well as any issues in
terms of deadbeats being filled with circles.. ( dunno where the heck that one came from..).
 Also, Lantern's cycloidic s and hypocyclo idics shoudl be correct in using the cage gear as an internal
so the output could concievab ly be used in harmonic drives such as suggested earlier this week.

Lots more work to be done, but we're getting there slowly.

Thx
Art

[Mooselake]

All straight lines in a test escapemen t gear.  No g code viewer on this machine, but it passed the eyeball test.  Does depth ratio mean anything with escapemen ts?  Setting it to 2 with spokes on (circle2, 3 spokes) makes the spokes bigger than the wheel.

A 59 pin cage with a 60 tooth pinion made a nice looking gear set.

Hope to fire up the router later, after the honeydo list.

Kirk

[ArtF]

excellent ..thx

 By the way, while I did fix the cage as an external gear, I didnt fix the spur as the external ring..hmm m..or vise versa..

anyway, now both are fixed and next release coudl be used to generate the tooth dats for a gear reducer based on
cycloidic curvature .

Thx
Art

[Mooselake]

The escapemen t gear cut in plywood and looks fine.  Waiting for the glue to dry on the test fixture, followed by a pendulum, and will see if it ticks.  Might be a few days; I'm on call or at work until Wednesday morning.

Kirk

[ArtF]

Kirk:

 Excellent . I hope to have mine ticking later this week as verificat ion as well.

Art

[John T]

Here is a picture of an escape that satisfies all my requireme nts.
1. It is a 30 tooth escape with a 7.5 tooth span and will be connected to a 39" (one second) pendulum.
2. The arbours are 1/16" of an inch and the  cutter is 1/16" end mill.

Currently it is mounted on a deputing gauge and I can tell from the gauge that it will do the job.

Thanks very much Art - the clock that it is destined for doesn't run really well (starts and stops) and I know this escape will resolve the problems in the escapemen t

[drobbins]

Art,

I just tried to cut my first pallet and hit a snag.
This is on a home built router controlle d with Mach3
It cut the outline of the pallet but then it started cutting what looks like one of the circular construct ion lines you used to design the pallet.
I used GM to output a dxf of the pallet then used CamBam to generate the g-code
I'm not sure if this is the same "circles" problem reported earlier but if so perhaps you squashed it in the GM generated g-code but it still remains in the dxf export
I couldn't see these circular lines in CamBam
I'm a rookie so perhaps I've done something wrong
I'll attach my g-code, maybe that will help

Dave

[drobbins]

Art

ignore my post, I think it's a case of operator error
haven't quite figured it out but I think it's something I'm doing wrong
newbie teething problems

Dave

[BobL]

Hi Dave;

 Looks like an offset was created on pawl itself and the centre shaft with code you posted. Are you using GM version 4.210? I just tried generatin g one here and did not run into this problem, see attacheme nt.

Cheers
Bob

[drobbins]

Hi Bob,

yea, I'm using 4.21
not sure what's going on but I keep getting flaky results and I'm sure it's something I'm doing wrong
still new at this and there's a lot to learn

Dave

Edit: the code you sent runs fine

[ArtF]

Hi Dave..et al..

  It could be that CamBam puts out small arcs in some spots. ( GM does the same , but puts out a G91.1 to ensure the Increment al direction is set right. )
CamBam may not put out the arc direction ..perhaps ..so you may want to check that. If it doesnt show up in a dxf, then it shouldnt show up in the GCode.

 John:

     Thanks, Im happy to hear yours is going to work. I got about 7 tick tocks today on mine. Unfortuna tley, a plastic clock with plastic shafts is just too hard on the shaft friction. I fear Im going to have to redesign with bearings on the shafts. But after getting 7 seconds of motion its clear to me that the escapemen t works as designed, so Im relieved to report that much.
 
     Thats the funny thing about a clock, the first big job is the design.. gears and escapemen t, I think after watching video #1 anyone could design one
with a bit of practice. Making one.. is also a major job. I had forgotten since my first, just how important the friction feedback is over the run of the ratio'ed gears. Im going to redesign with pickyness to get that down to where it will do the job. So Video #2 will be delayed while I redo it all with the aim of having one running that I can use to point out all the pitfalls one might not suspect they will run into. Things like sharing a shaft for the second and minute hand, but ensureing no weight is put to that shaft unless its well hung on bearings. .  things you should look out for. I think thats the next step in getting more clockmake rs out there, and Ill focus on that for the next couple weeks while I study grasshopp ers a bit more. For example, a deadbeat gear really should turn just by blowing on its teeth if its well hung.. mine is close to that, but needs work ..

 Glad to hear things are going so well,
Art

[BobL]

Hey guy's..

I begin by saying I am a novice to clockmaki ng, but I did witness the GM clock tick on it's own too for about 10 seconds as Art mentioned . Was awesome to see but man are they ever picky.... Bearings I agree will help, but maybe it just needs a longer pendulum to get that full swing of things.. After messing with these a bit, I now have a much greater appreciat ion for anyone successfu l in making one over the years and many thanks to Art for giving us a great shot at being successfu l in making one with GM.

Cheers
Bob
 

[drobbins]

Folks

I'm pretty sure my problem has something to do with Mach3
The g-code that does weird stuff on my router runs fine on my desktop machine so I think it's something downstrea m from creating the g-code

anyway, back to clocks
I have most of the gear train for my first clock made and I used roller skate bearings for all the gears
they were about $.50 apiece on amazon and look like they'll work great

Dave

[John T]

Hi Art,
Just to let you know and hopefully attach a working video.  I have cut the 3" escapemen t wheel at 1/8" thickness and 1/16" arbor.  The pallets are 1/4" with a 1/16" arbor and the pendulum attached directly to the escape arbor (no verge).

The clockwork s was started last evening and hasn't missed a beat in 16 hours - Great.

Thanks for all your efforts in putting this program together.  I have some new "factors" to work with but with a little effort on my part it works like a charm.

John

I Hope the little 16 sec. video will play for you.

[ArtF]

Fanstasti c John..

  Im saddened only by the fact you beat me.

I just ordered a lot of 100 small bearings from Ebay.. Ill redo my design of the casing to match those, should run fine then .

Art