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Haven’t tried changing the acceleration that may be worth trying. This is not belt driven it’s rack and pinion.

Sorry I should have added that the backlash was measured using a 1 metre long optical scale that I use to tune my stepper motors, there is minimal load. I go past the reference point the move...

I have been checking the backlash on my router and found that the feed rate affects the amount of backlash. At a slow speed, 100-500 mm/m, I get around .1 to .18 mm backlash but at a feed rate of...

Ok let us know how you get on and thanks again.

I can make this work by having a tool change from a tool from the rough tool list to the same tool in the finish tool list so I’m all good here.
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Hi Burr,

OK it was the tool change, if I swap the ball mill in the ball feature to the same tool as used in the rough feature I get the original problem, the indexing doesn't work. Guess I need to...

Hi Burr,

Well an't that something, yes it works when I post the ball feature. I stopped that when I was running tests on the router as I didn't want to wait that long.

When I deleted the ball...

Hi Burr, no I'm not adding an "index system", I did try that but it didn't seem to do much although I don't know how this works.

I have zipped my PP and bbcd files and would appreciate any...

After some more investigation it seems I can get indexing working after a 4 axis rotary feature if I select Zig Zag in the 4 Axis Rotary Patterns but only with Style=Around. This won't work if...

Sorry about the typo in your handle in my last reply Burr.:cheers:

Yes I did try that a year or two ago but can't remember why it didn't work for me, I'll give it another go now I know a bit more.

Thanks BureMan, I did discover this myself and have set my machine limit to something like 1,000,000 so that's not my issue now. At the end of this job the machine is at something like 113,000...

After a couple of days investigating this I have found that the original p_rot and s_rot do output move info when feed_mode is used on each feed block, this was missing in the Mach PP so I dumped it...

Thanks AL. I have been using BC 4X post as a reference for years but it also uses p_ and s_rot for its moves in blocks 50-57! BC 4X does use
output_primary_rotary_index...

I'm planning on doing some 4 axis routing with V31 and noticed that the NC code had "B0" without a move command near the beginning on the code but no rotary axis moves where I expected them, so I...

OK thanks Al, that worked well. I have never looked at "toolpath pattern" before, maybe I should explore all the other bits of BobCAD to find what I'm missing. I have started playing with threading...

How can I get 3 axis milling in nesting? I'm trying to make a lot of screw top containers with the inside profile cut from a 3d model!

Calum

I think the my problem was the fact that I captured a curve with a probe and this made a lot of short lines which may not have been a smooth curve. The solid I made using this curve had a few...

Thanks BurrMan that seems to have fixed things you are a hero.

Cheers
Calum

Task manager and Resource Monitor is no help just says BC is not responding with CPU staying about the same all the time, the memory used by BC is around 3GB and no disk activity.

Not sure about...

Thanks BurrMan,

Yeah I looked at the CAD tree, there's no too much there. Saves were slow without tool path. My part is 1 metre long with a 5 mm DOC and 1.5 mm stepover.

No I don't use the...

Hi Rob,

Thanks for the suggestions.

The File is around 86MB, is this large? I have tried saving as an STL seemed to help a bit, file size is 59MB. My PC is an I& 6 core running at 3.3 GHz with...

I have recently made a 3D shape and it takes a very long time to save and recalculate changes etc., 30 minutes or more. Is there any way to speed this up?

Hi Everyone,

My name is Calum MacLeod and I live in Auckland, New Zealand. I build a gantry router using Mach3, 6 or 7 years ago and a couple of years ago I converted a mill/drill to CNC and I'm...