How To Mill Slots
2021年5月28日Register here: http://gg.gg/ur8w5
*How To Mill Slots On Milling Machine
*How To Mill Slots In Steel
Using Trochoidal Milling to cut a slot The idea is each cut is a circular arc rather than moving down the slot in a straight line. The advantage of Trochoidal Milling is it keeps a constant load on the cutter so you can run higher feeds and speeds. If I cut a slot in a piece of material.123’ and NEED a slot.260’, then I need to remove.137’ MORE. But I need to remove 1/2 of that on either side of the center line, or.0685’ in one direction, and.0685’ in the other direction. So, I lower the end mill into the slot.
.206 slot, you can use a 3/16 end mill & then move it. 13/64 would give you.203.
I needed a quick-and-dirty 36VDC unregulated linear power supply to drive some HobbyCNC boards on my test system. I wanted the bridge rectifier to mount directly to the PC board. The beefy bridge rectifier that I had in my stock was the type with the large spade-type terminals. I needed to mill slots in a PC board for mounting this bulky part.
Getting slots in the PC board took some digging. I designed the bridge rectifier footprint in KiCAD to have oval pads with oval holes, but this did not translate via the drill file into FlatCAM – only one round hole would be drilled.
To make the slots, I had to create a New Geometry ‘layer’ and add simple straight lines dead center of where I wanted the slots milled. FlatCAM would then just mill one pass, centered over that line. This required a third milling file – one for the bottom Cu, one for drilling and the third for the four slots.
Came out P E R F E C T! Next board will have some pretty fine geometry, squeezing traces between DIP pads. We’ll see. . .
Having that leg of the angle iron that you are milling unsupported really isn’t the best setup. I’m glad that it worked for you but you should really hold pieces completely.
That formula for calculating spindle speed is wrong too. This is the real formula
(PI * DIA X RPM) / 12 = SFPMHow To Mill Slots On Milling Machine
Using your formula it says to run a 5/16 inch cutter at 550 RPM which is only 45 SFPM, less than half the speed you should run. You should mill steel at 100 SFPM or more.How To Mill Slots In Steel
I’ll mock up a better setup. Ignore the burn holes in the steel. It is the first piece of scrap angle I found laying around. Anyhow, the hold down on the leg keeps it from fluttering around. Chatter is a bad thing when machining.
Register here: http://gg.gg/ur8w5
https://diarynote-jp.indered.space
*How To Mill Slots On Milling Machine
*How To Mill Slots In Steel
Using Trochoidal Milling to cut a slot The idea is each cut is a circular arc rather than moving down the slot in a straight line. The advantage of Trochoidal Milling is it keeps a constant load on the cutter so you can run higher feeds and speeds. If I cut a slot in a piece of material.123’ and NEED a slot.260’, then I need to remove.137’ MORE. But I need to remove 1/2 of that on either side of the center line, or.0685’ in one direction, and.0685’ in the other direction. So, I lower the end mill into the slot.
.206 slot, you can use a 3/16 end mill & then move it. 13/64 would give you.203.
I needed a quick-and-dirty 36VDC unregulated linear power supply to drive some HobbyCNC boards on my test system. I wanted the bridge rectifier to mount directly to the PC board. The beefy bridge rectifier that I had in my stock was the type with the large spade-type terminals. I needed to mill slots in a PC board for mounting this bulky part.
Getting slots in the PC board took some digging. I designed the bridge rectifier footprint in KiCAD to have oval pads with oval holes, but this did not translate via the drill file into FlatCAM – only one round hole would be drilled.
To make the slots, I had to create a New Geometry ‘layer’ and add simple straight lines dead center of where I wanted the slots milled. FlatCAM would then just mill one pass, centered over that line. This required a third milling file – one for the bottom Cu, one for drilling and the third for the four slots.
Came out P E R F E C T! Next board will have some pretty fine geometry, squeezing traces between DIP pads. We’ll see. . .
Having that leg of the angle iron that you are milling unsupported really isn’t the best setup. I’m glad that it worked for you but you should really hold pieces completely.
That formula for calculating spindle speed is wrong too. This is the real formula
(PI * DIA X RPM) / 12 = SFPMHow To Mill Slots On Milling Machine
Using your formula it says to run a 5/16 inch cutter at 550 RPM which is only 45 SFPM, less than half the speed you should run. You should mill steel at 100 SFPM or more.How To Mill Slots In Steel
I’ll mock up a better setup. Ignore the burn holes in the steel. It is the first piece of scrap angle I found laying around. Anyhow, the hold down on the leg keeps it from fluttering around. Chatter is a bad thing when machining.
Register here: http://gg.gg/ur8w5
https://diarynote-jp.indered.space
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