OOPS.

OOPS.

This topic has 4 replies, 4 voices, and was last updated 19 October 2025 at 11:39 by Nigel Graham 2.

Viewing 5 posts - 1 through 5 (of 5 total)

Author

Posts
18 October 2025 at 12:34 #820604
Dave S
Participant
@daves59043
Can you see the problem with the ‘clean up the edges’ part of the tool path?

Yes: failed to notice that the bottom height was set below the vice jaws.

This is what happens to a 6mm Carbide end mill when you try to machine hardened steel at aluminium feed rates:

Didn’t half make a ‘bang’!

Totally my fault – I was running an adaptive clearing path to rough out the block and the inner section is at Z-4mm – which is Vice jaws +2mm give or take. The outer section of the same tool path headed down to ‘model bottom’. I didn’t notice when checking, or I would have set the bottom height to Z-4mm.

Sigh, and other ‘learning’ on my CNC journey

Dave
Advert

18 October 2025 at 12:51 #820606
Oldiron
Participant
@oldiron
Oh dear! Another learning experience. You hopefully will not make that mistake again.
18 October 2025 at 13:36 #820609
JasonB
Moderator
@jasonb
You get a bigger bang if you plunge straight down into the vice jaws😥

It is possible to alter the default heights in F360. That way if you forget to change one the worse that could happen is you don’t cut any metal. You can set the default bottom height to model top which is the safest option.

https://forums.autodesk.com/t5/fusion-support-forum/can-i-change-default-heights/td-p/7969739
18 October 2025 at 16:18 #820613
Dave S
Participant
@daves59043
That is a useful thing.

Going to alter that now.

Dave
19 October 2025 at 11:39 #820697
Nigel Graham 2
Participant
@nigelgraham2
Even the professionals sometimes get it wrong.

One of my former employers proudly bought a CNC mill.

Then found it a cutter-diameter or so too small for the exterior of a component milled from an alumium-alloy “paving-slab”…

Solution?

They re-designed the component so the mill could cope with it.
Author

Posts

Viewing 5 posts - 1 through 5 (of 5 total)

Please log in to reply to this topic. Registering is free and easy using the links on the menu at the top of this page.

Code of Conduct

Latest Replies

Viewing 25 topics - 1 through 25 (of 25 total)

- Topic
- Voices
- Posts
- Last Post
- Starting to use Proxxon MF70
  Started by: barryblundell in: Workshop Tools and Tooling
- 8
- 25
- 3 June 2026 at 23:38
  Michael Gilligan
- Myford VMC Spindle Advice Please.
  Started by: Nigel Graham 2 in: Manual machine tools
- 4
- 5
- 3 June 2026 at 23:13
  Nigel Graham 2
- Wallace valvegear simulator
  Started by: Kevan Shaw in: General Questions
- 7
- 21
- 3 June 2026 at 23:07
  John Purdy
- Steam Powered Lawn Mower!. 1 2
  Started by: Richard S2 in: Related Hobbies including Vehicle Restoration
- 13
- 36
- 3 June 2026 at 22:36
  Richard S2
- Taylor Hobson Pantograph Engraver Model D
  Started by: jaCK Hobson in: Workshop Tools and Tooling
- 6
- 14
- 3 June 2026 at 21:47
  Charles Jambon
- Replacement Allbrit Draftmaster Protractor Rulers
  Started by: wigan2026 in: Workshop Tools and Tooling
- 4
- 4
- 3 June 2026 at 21:10
  howardb
- New member..
  Started by: wigan2026 in: Introduce Yourself – New members start here!
- 2
- 2
- 3 June 2026 at 20:43
  noel shelley
- Band saw 1 2
  Started by: Peter Simpson 3 in: Beginners questions
- 22
- 50
- 3 June 2026 at 19:49
  Adam Harris
- Allbrit ruler scales
  Started by: wigan2026 in: General Questions
- 1
- 1
- 3 June 2026 at 18:28
  wigan2026
- I wanted to learn 3D cad but couldn’t be bothered…
  Started by: wilson logan 1 in: CAD – Technical drawing & design
- 10
- 13
- 3 June 2026 at 15:40
  george baker 1
- Improving a 30 taper fit
  Started by: Andrew Skinner in: Manual machine tools
- 8
- 10
- 3 June 2026 at 15:40
  DC31k
- Patterns for 4″ Scale Burrell Traction
  Started by: Martin Johnson 1 in: Traction engines
- 3
- 5
- 3 June 2026 at 12:44
  Martin Johnson 1
- upgrade of Alibre Atom 3D
  Started by: David George 1 in: CAD – Technical drawing & design
- 3
- 3
- 3 June 2026 at 10:03
  David Jupp
- AutoCAD 2000 – How to create wavy line indicating a truncated view of an obect
  Started by: Greensands in: Beginners questions
- 6
- 10
- 3 June 2026 at 07:14
  Alan Charleston
- Steam Traction World in administration
  Started by: Baldric in: The Tea Room
- 12
- 19
- 2 June 2026 at 22:39
  Nigel Graham 2
- 3 1/2″ Gauge Discussion Group 1 2 3
  Started by: Neil Wyatt in: General Questions
- 36
- 69
- 2 June 2026 at 22:12
  Nigel Graham 2
- Emco Compact 5 milling table restoration
  Started by: rikt in: Manual machine tools
- 2
- 3
- 2 June 2026 at 22:05
  Nigel Graham 2
- Richard B’s Minnie.
  Started by: Richard B in: Traction engines
- 4
- 19
- 2 June 2026 at 17:14
  JasonB
- Printed 3D metal better than a Casting 1 2 3
  Started by: JasonB in: 3D Printers and 3D Printing
- 20
- 59
- 2 June 2026 at 16:26
  JasonB
- Emco FB2 Quirks and Additions 1 2 3 4
  Started by: Graham Meek in: Manual machine tools
- 17
- 86
- 2 June 2026 at 16:14
  Graham Meek
- Traction engine, Gasket between Zylinder a. Boiler
  Started by: karl07 in: Beginners questions
- 8
- 14
- 2 June 2026 at 15:31
  karl07
- Potential Articles Sought
  Started by: Neil Wyatt in: Model Engineer & Workshop
- 1
- 2
- 2 June 2026 at 09:27
  Neil Wyatt
- 24cc DIESEL ENGINE FROM SOLID 1 2 3
  Started by: dean clarke 2 in: I/C Engines
- 12
- 53
- 2 June 2026 at 06:08
  dean clarke 2
- Lubricating the regulator valve.
  Started by: Thomas Clarke in: Beginners questions
- 4
- 4
- 1 June 2026 at 23:58
  Nigel Graham 2
- Castle Class
  Started by: oilyrags in: Locomotives
- 2
- 3
- 1 June 2026 at 21:41
  oilyrags

Viewing 25 topics - 1 through 25 (of 25 total)

View full reply list.

Latest Issue

May 2026

Buy Latest/Back Issues

Newsletter Sign-up

Latest Replies