Appreciate these tutorials brother, I'm a student learning about CNC and I was wondering if I can ask you something not really related to mastercam but more to hole making in general: I was wondering for example, when we have a blind hole which needs tight tolerance and good surface quality, what is the process of making that hole? Is it like this? 1. Center drilling/Spot drilling 2. Drilling 3. Reaming or could just using an end mill be enough? I know that there maybe more factors, like the hole size, if it needs a flat end at the bottom, if it's a through hole.... But I just wanted to hear your opinion in general since you seem like a skilled engineer :)
Also another thing that came to my mind. When doing large pockets for example, is it maybe a good strategy to drill a hole in the center of that pocket so that the endmill has open and nice space to cut it? Or is this a waste of time? For example: A square pocket of 4x4 inches, and we drill a hole about 5/8 inches in the center, and then with an endmill slightly smaller use it to cut the pocket Is it more optimal for the tool, or is the ramping/helix better?
Hi Andy, sorry for the late reply. What you're describing is how I would approach both scenarios. Re: your first comment, I would say that circle milling holes to their desired size gives you the most control because you don't have to use multiple reamers if you eventually need to open the hole up +.001 on the next part. Re: your second comment, I'm going to make a video on what you're asking soon. But we just did a comparison in class where pre drilling and finishing slots was magnitudes faster than helicaling and finishing every slot with an endmill alone. Likewise, pre drilling takes a lot of the cutting pressure off the endmill when it plunges in Z. Thanks!
Appreciate these tutorials brother, I'm a student learning about CNC and I was wondering if I can ask you something not really related to mastercam but more to hole making in general:
I was wondering for example, when we have a blind hole which needs tight tolerance and good surface quality, what is the process of making that hole?
Is it like this?
1. Center drilling/Spot drilling
2. Drilling
3. Reaming
or could just using an end mill be enough? I know that there maybe more factors, like the hole size, if it needs a flat end at the bottom, if it's a through hole.... But I just wanted to hear your opinion in general since you seem like a skilled engineer :)
Also another thing that came to my mind.
When doing large pockets for example, is it maybe a good strategy to drill a hole in the center of that pocket so that the endmill has open and nice space to cut it? Or is this a waste of time?
For example: A square pocket of 4x4 inches, and we drill a hole about 5/8 inches in the center, and then with an endmill slightly smaller use it to cut the pocket
Is it more optimal for the tool, or is the ramping/helix better?
Hi Andy, sorry for the late reply. What you're describing is how I would approach both scenarios.
Re: your first comment, I would say that circle milling holes to their desired size gives you the most control because you don't have to use multiple reamers if you eventually need to open the hole up +.001 on the next part.
Re: your second comment, I'm going to make a video on what you're asking soon. But we just did a comparison in class where pre drilling and finishing slots was magnitudes faster than helicaling and finishing every slot with an endmill alone. Likewise, pre drilling takes a lot of the cutting pressure off the endmill when it plunges in Z.
Thanks!
thank so much brother .. keep production video please
Will do, should have some more videos coming soon. Thanks!