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CNC-2116 - Up and running, sort of (2015-03-21)
Yvan256:
--- Quote from: Typefighter01 on July 13, 2014, 07:41:28 pm ---Yes Yvan, if no changes to your file are made, it would take 3h12m to cut all 8 plates. 300% increase to feed rate is as far as Mach goes, but from my own experience with routers and MDF, I would say, I could drop cutting time from 8min by another 2 or 3 minutes and still safely cut all 8 plates. That puts a total cutting time of around 40min. How fast do you want to see them cut?
--- End quote ---
Just cut them at the speed you are comfortable with. With my MDX-3 and the 1mm end mill, I'm used to something around 8 to 10 hours to cut all eight plates. Taking only 40 minutes to cut all eight plates seems like lightspeed to me. Just be careful if you do buy the Dremel #650 end mill, I've read that it burns easily.
--- Quote from: Typefighter01 on July 13, 2014, 07:41:28 pm ---Question...where (when) is cutting speed generated? I know in Artcam express, when I select different cutting tools, before I generate code, each tool has a feed rate listed beside them (suggested rates anyway as they are user defineable).
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My program doesn't generate any specific cutting speeds at the moment for the G-Code output, only paths. I do use codes G00 and G01, so there's "travel speed" and "cutting speed" parameters in the file, but the actual speeds for those codes should be defined by your software. FYI, the travel speed only occurs above the workpiece.
Yvan256:
Typefighter01, did you have time to pick up a square end 1/8" end mill yet?
Hold on before cutting the plates, I'll make you cut something else instead. :P
Typefighter01:
Yes I did >:D
Grabbed a 1/8" for your testing and a 1/4" for me.
I just need to come up with a hold down system. I do have double sided tape that I will probably use for now.
Send me some g-code when your ready.
EDIT: These are Up-Cut Spiral bits, not end mills (thanks macattack)...
Yvan256:
--- Quote from: Typefighter01 on July 19, 2014, 08:17:32 pm ---Yes I did >:D
Grabbed a 1/8" for your testing and a 1/4" for me.
I just need to come up with a hold down system. I do have double sided tape that I will probably use for now.
Send me some g-code when your ready.
EDIT: These are Up-Cut Spiral bits, not end mills (thanks macattack)...
--- End quote ---
Double-sided tape? It really didn't work on MDF last time I tried. Doesn't your router table have T-slots? Let's switch this conversation to your thread.
Yvan256:
Small text-only update for whoever is still following this thread: I'm having problems with the 1mm cutting bits. I think they're flexing a little while cutting and it's messing up all my measurements on the parts by 0.2mm, which doesn't sound like much until you try assembling parts together.
I've added 200 milliseconds of dwell time between all lines to see if it helps. It does slow down cutting holes quite a bit though, I'll have to add an on/off parameter for the dwelling time. :P
edit: nope, cuts are still messed up. I'll switch back to my 1/8" end mill to see if the problem is with the 1mm bits or with the MDX-3 itself.
2014-08-10: tested cutting a 10x10mm part with the Dremel #650, 1/8" straight router bit, there's still a 0.2mm difference on the cut part. The weird thing is, it's 0.2mm smaller so it's definitely not a spindle runout. The MDX-3 is getting old, maybe there's play in the frame since one side is broken, maybe the belts are under-tensioned, etc.
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