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### Author Topic: My first air cut (Video)  (Read 573 times)

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#### Pythagoras

• 93
• a² + b² = c²
##### My first air cut (Video)
« on: May 26, 2020, 12:30:20 AM »
Hey guys, its been 10 years since I had my last CNC machine. I lost all interest at one stage, but there have been certain times I wished I had one to make different ideas.
Ive surprized myself but not going down the steel road, and using ply wood instead. Once I would have looked down on this kind of build, but I think having a saw table has opened my mind as the how accurate I can cut ply. The table and gantry are torsin boxes and super rigid. Anyhow its really great to here the sound of steppers singing after all this time. I nhave a LOT of refindments to make and I was thinking that the machine could make many of the update parts. Its great to be back.
Benny
<iframe width="560" height="315" src="https://www.youtube.com/embed/V6OmvDKA7eo" frameborder="0" allow="accelerometer; autoplay; encrypted-media; gyroscope; picture-in-picture" allowfullscreen></iframe>

EDIT:Cant remember how to embed video? https://youtu.be/V6OmvDKA7eo
The Pythagorean theorem: The sum of the areas of the two squares on the legs (a and b) equals the area of the square on the hypotenuse (c).     a² + b² = c².

#### Tweakie.CNC

• 8,803
• Super Kitty
##### Re: My first air cut (Video)
« Reply #1 on: May 26, 2020, 01:43:54 AM »
Excellent work Benny, a very nice looking machine.
Just one comment - you need more belt wrapped around the gantry stepper motor pulley

Tweakie.
KEEP SAFE !

#### Pythagoras

• 93
• a² + b² = c²
##### Re: My first air cut (Video)
« Reply #2 on: May 26, 2020, 02:36:57 AM »
Hey good sir, great to see you are still around too.
Yes you would think that, and I have two flat toothless pulleys for that, but I have noticed that since the belt is driving ball screws it doesnt jump. Reckon you could tow a Volvo with that gantry arrangement before the belt skipped out. Im more concerned at having my nuts caught in the belt and pulley. Guards and redesign still to come.
The Pythagorean theorem: The sum of the areas of the two squares on the legs (a and b) equals the area of the square on the hypotenuse (c).     a² + b² = c².

#### Tweakie.CNC

• 8,803
• Super Kitty
##### Re: My first air cut (Video)
« Reply #3 on: May 26, 2020, 03:02:15 AM »
Quote
Im more concerned at having my nuts caught in the belt and pulley.

Tweakie.
KEEP SAFE !

#### Pythagoras

• 93
• a² + b² = c²
##### Re: My first air cut (Video)
« Reply #4 on: May 26, 2020, 04:48:54 AM »
Im redesigning the jogging screen but need help writing the incremental buttons. I keep getting a mach error message.
Could someone just write me the gcode for one button ? Thanks.
The Pythagorean theorem: The sum of the areas of the two squares on the legs (a and b) equals the area of the square on the hypotenuse (c).     a² + b² = c².

#### Graham Waterworth

• 2,379
• Yorkshire Dales, England
##### Re: My first air cut (Video)
« Reply #5 on: May 27, 2020, 08:37:14 PM »
Code "G00 G91 X1."
while Ismoving()
Sleep(25)
Wend

Or is this not what you need

Without engineers the world stops

#### Pythagoras

• 93
• a² + b² = c²
##### Re: My first air cut (Video)
« Reply #6 on: May 28, 2020, 01:21:12 AM »
Thanks Graham. Thats exactly what I was looking for. I appreciate your help.
BTW are you still an admin here? Any chance of enabling video embed? I remember the setting is in there.
If videos are embedded from Youtube it wont slow down the forum at all.
Also In slightly confuse with setting up my A axis. If I type "g00 g91 a360" it should spin exactly once?
The Pythagorean theorem: The sum of the areas of the two squares on the legs (a and b) equals the area of the square on the hypotenuse (c).     a² + b² = c².

#### Graham Waterworth

• 2,379
• Yorkshire Dales, England
##### Re: My first air cut (Video)
« Reply #7 on: May 28, 2020, 04:53:54 PM »
Only if you have steps per degree set right.

Without engineers the world stops

#### BR549

• 6,952
##### Re: My first air cut (Video)
« Reply #8 on: May 29, 2020, 09:21:16 AM »
When calibrating the rotary axis it is best to do a min 10 turn test to check for errors in the steps/per. At one rev it is very hard to spot a couple of steps error where a 10 turn test makes it obvious.

Just a thought, (;-) TP