Messages

101

General Mach Discussion / Re: Mill or Turn?

« on: May 24, 2019, 10:03:47 AM »

This problem has been there all along i think, pretty certain its the speed not a torque overload...

I can run ok up to 2980rpm, anything above that and the following-error runs away and it will fault out, same fwd and rev.

I have tried altering the voltage gain on the drive, tried altering the max speed on the drive

I can fudge it by setting Mach pulleys to 2980 but it seems some CSS code can get round that and will fault out when cutting as i found on my first run earlier.

I have tried other DAC channels on the controller, same.

Spent another day fiddling and got nowhere really.

Any thoughts???

102

General Mach Discussion / Re: Mill or Turn?

« on: May 24, 2019, 08:25:13 AM »

Ok so we have made a part (sort of) 

Spindle axis ePid faults wrecked it by stopping dead mid part-off, twice.

So i still have settings issues with my servo, anyone have any thoughts here??

This is generally triggered by the following-error counter reaching its max setting, currently 10,000 steps or 1 turn.

When it occurred, the tool was maybe halfway in the slot.

The rest of the part went perfectly, finish was 100%, facing off was perfect, just the last bit 

103

General Mach Discussion / Re: Mill or Turn?

« on: May 24, 2019, 07:36:33 AM »

Thanks

the idea or quest for one tool was not because of tool positioning etc - i have a QC tool post mounted and have 4-5 holders spare.

The idea was for simplicity - no tool changes is better than 1-2-3 changes (especially when you have no ATC) and with the tools i have seen available today, this part should be a walk in the park 

I have indeed learnt a lot - no cnc lathe use before, just manual, and yes as you say its just automation - the skill is getting the software to imitate what would be done manually, tricky as i just found out when there are a myriad settings to tweak.

I only have one tool post, as far as CAM goes, its just a normal front mounted post lathe, my post is rotated 90 degrees so the tools face backwards as the mount is to the Quill but apart from that its bog standard.

Yes i did read warnings about not mixing front/rear posts in the TT but thats not an issue here.

104

General Mach Discussion / Re: Mill or Turn?

« on: May 24, 2019, 07:08:32 AM »

Ignore the last post, a guy on Fusion forum just replied - its called "Back-Off" distance, setting it to zero cures the path.

 

105

General Mach Discussion / Re: Mill or Turn?

« on: May 24, 2019, 06:59:52 AM »

Ok, thanks to the tool path and dry run, i can see a problem, i think?

Arrowed in the pic attached is a path that bothers me.

This tool plunges ok but then makes a 45 degree retract - this will be cutting metal way deeper than the insert is allowed i think on its flanks.

I can see no settings in fusion that will stop this action, lead-ins and lead-outs are off.

Any ideas?

This is the code...

Code: [Select]

N20 T0101
N22 G54
N24 M8
N26 G95
N28 G97 S707 M3
N30 G0 X45. Z0.
N32 G48 S3000
N34 G96 S100 M3
N36 G0 Z-26.4
N38 X29.
N40 G1 X25. F0.1
N42 X21.986
N44 X23.986 Z-27.4
N46 X27.425
N48 G0 X29.
N50 Z-24.933
N52 G1 X25. F0.1
Line N44 seems to be the one.

106

General Mach Discussion / Re: Mill or Turn?

« on: May 24, 2019, 04:20:59 AM »

Yeah, I count as a hobbyist because my turnover is way below the mark, luckily. When they move that mark, things will change and because its all cloud based I could lose all my work Being held to ransom really, hopefully it will continue for a good time yet though.

The rumour is that its free as we are effectively Beta-Testing it for them, long may it remain in Beta

107

General Mach Discussion / Re: Mill or Turn?

« on: May 24, 2019, 02:40:14 AM »

Thanks,

Looks almost identical to my flavour I think, can't see any practical benefit for tool or work?

I checked BobCad and never knew it was that expensive I'll stick with Fusion I think until they withdraw the free usage.

108

General Mach Discussion / Re: Mill or Turn?

« on: May 23, 2019, 04:46:34 PM »

Interesting, not a million miles away from my attempt, i'll try CAM'ing it that way....

109

General Mach Discussion / Re: Mill or Turn?

« on: May 23, 2019, 04:08:40 PM »

No dxf, its a simple shape, 23mm dia, 24mm long, 3mm rads on ends, 6060 aluminium.

The tool is a Korloy MGEHR with a MGMN150-G PC5300 insert, 1.5mm wide neutral angle, with clearance, max depth 14.5mm.

110

General Mach Discussion / Re: Mill or Turn?

« on: May 23, 2019, 07:24:32 AM »

Hmm, ok.

Material is 6060 aluminium

You would groove the body away maybe, then just a final finish cut?

Was trying to go with just one tool