Questions tagged [drill]
The drill tag has no usage guidance.
31
questions
4
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Account for Via Stubs When Calculating Impedance?
I'm working on an eighteen-layer board right now. Almost all of the signal layers have high-speed, single-ended traces that should run up to 15 gbit/s. The vias for these high-speed traces will be ...
- 187
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0
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78
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Trying to automate a drill
I’m very desperate to solve this problem so any advice is greatly appreciated.
I got a deal on a 9A corded drill and took it apart today after testing to make sure it has enough power to do what I ...
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0
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41
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Generate separate drill file for via filling in Altium 16
For a current PCB design I have "Via In Pad." I want to manufacture the PCB with Eurocircuit.
Eurocircuit recommends to use "Via filling" for this.
The guideline says to define ...
0
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0
answers
46
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How do I control the speed of a universal AC motor and measure the voltage and current flowing through it?
It is desired to be able to control the speed of my rotary drill as well as measure the average torque (or is RMS torque a thing?) of the universal AC motor.
I am using this torque equation: τ = (I * ...
1
vote
1
answer
100
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Why are there small coils prior to the brushes in a drill?
I'm trying to repair a drill where the switch got broken. It's turning into something more difficult than I expected due to several issues. One of them is that the brush wires got peeled due to some ...
- 117
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2
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76
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PCB specs, Meaning of "6-1" diameter
I'm using a relay for a PCB, but have trouble understanding some of the specs for the recommended hole drill sizes.
As shown below, the spec sheet indicates a "6-1" diameter hole.
What is ...
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1
vote
1
answer
137
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A hole in middle of a capacitive touch screen
I'm thinking about using a capacitive touch screen (the touch layer only, no display) to detect the position of two moving parts. Each part would have its 'stylus' just above the screen to mark the ...
- 113
1
vote
4
answers
668
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KiCad how to export oval PCB hole as a drill file?
Using KiCad, is there a way to have a pad with an slot shape (referred to in KiCad as "oval") be exported properly as a drill (.drl) file?
The pad in KiCad looks like Fig. 1 below.
But after ...
- 547
19
votes
3
answers
2k
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What is the meaning of this datasheet diameter notation?
I am reading this datasheet and I want to drill the correct size hole into the board and I am confused what 5-ø1.2 means.
I can't understand what the 5 and - sign mean? Your help would be greatly ...
- 307
1
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answer
140
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What's the purpose of a drill symbol?
I use OrCAD environment for designing PCBs but I've never thought about what is the purpose of a Drill Symbol in padstack creator. The diameter is set in the Drill bookmark and other parameters like ...
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67
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Power drill motor with no electronics? [duplicate]
I have a Bosch power drill, the same as in this other question.
I checked it carefully and it doesn't seem to have a capacitor or any other electronic components.
Does it mean the universal motor ...
0
votes
2
answers
78
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drilling SMT footprints for fitting THT parts
I have bought by mistake some THT caps instead of SMD and would like to use them still. They were bought from a supplier who has the bad habit of not answering customer requests. These are 5000h caps, ...
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1
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2k
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Excellon NC drill files from Altium
How to generate an Excellon NC drill file from Altium, as my PCB manufacturer does not require a cam file. The NC drill file generated from Altium is a .CAM file, whereas, my PCB manufacturer requires ...
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1
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364
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Is it a routed slot the same than creepage concept and how to calculate slot width?
I was reading a high voltage pcb design guide and it talks about insulators insertions, routed slots, gradient rings, etc.. but it doesn't talk about creepage. As the creepage could be achieved by ...
- 603
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1
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744
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Converting a 9.6V NiCad Drill to Li-on [closed]
I am trying to convert my 9.6V NiCad drill to run off a 12V Li-on battery. When I connect the Li-On directly, the motor only just slightly spins and stops. The only way I can get it to work is using a ...
3
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2
answers
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How many amps does a 18v cordless drill draw? [closed]
I have bought an old 18v black and decker cordless drill but with broken batteries, for that, I want to buy a boost converter to convert 12v (max 20A ) from a computer power supply to 18v and use this ...
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votes
1
answer
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Hole Drill Sizes >1mm in Eagle?
I am currently trying to build a package for a through hole potentiometer in Eagle Cad and I wanted to incorporate holes in my PCB for the metal tabs on the side of the pot. I determined that these ...
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1
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70
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Small wind generator project
Why when I spin a dc motor (USED AS A GENERATOR )with drill it does not light up led , but when I spin it with my fingers it light up
0
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5
answers
3k
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EAGLE Square hole
I want to make a square hole in the middle of my PCB, but when I choose to make a drill or hole is only a circle! Isn't there a option or a ULP file that allow me to do a square hole? I can't find ...
1
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2
answers
1k
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How do you find buried vias in Altium Designer?
I am working on a complex 8-layer PCB to which I have made a number of changes and improvements.
I now want to sent the board out for production and want to check for any unnecessary cost. One of the ...
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2
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1k
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converted cordless drill to corded drill - only works once
I have read several articles about converting cordless drill into corded drill.
I have an old Craftsman 10.8V NiCd battery. It comes with 2 batteries. One is completely dead and the other is 90% dead....
- 111
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1
answer
53
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Ni-Mh batteries, low capacity better performance?
When we take appart cordless things like drills, vacuum cleaners, telephones..., they often use small capacity (like 700 mAh) Ni-Mh cells. I've always thought that it was because of cost reduction, ...
- 210
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1
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3k
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delete drill layer in eagle without redoing board
When I go to make my own circuit boards with eagle, after saving, I run the drill-aid.ulp script so eagle can convert all over-sized drill holes to small size. It helps me with drilling. I then saved ...
user143136
1
vote
2
answers
531
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drilling pin header holes when exact drill size not locally available
I checked all of the hardware stores in my area and I can buy 1/32 (~ 0.79mm) and 3/64 inch (~ 1.2mm) drill bits. No source in my area carries bits which are between those two sizes which would then ...
user143136
2
votes
0
answers
333
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Powering 10.8V DeWalt cordless drill from mains
There was a couple of questions on how to power a cordless drill, but they are all about power supplies.
I've got a DeWalt 10.8V cordless drill and its battery connects through 4 pins instead of 2 or ...
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1
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780
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Powering a 14.4V motor - RS550
I took this motor from a cordless drill and I would like to power up directly from a power supply and not from the battery. The datasheet says the stall current draw is 70/85 Amps (I'm not sure wich ...
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2
votes
0
answers
522
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Multi-layer board drill pair recommendations to reduce PCB cost
I'm designing a simple 6 layer board with following as core components.
http://www.ti.com/lit/ds/symlink/tm4c123gh6pm.pdf
http://www.ti.com/lit/ds/symlink/afe4403.pdf
I using this stackup
Now I'm ...
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0
votes
1
answer
645
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Shrinking drill hole size in Eagle
The last time I did a successful PCB, the drill hole size relative to the component pad size is rather huge to the point where when I entered the soldering stage, the component wires were not ...
user116345
5
votes
4
answers
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Altium PCB Layout: The Difference of Through Via, Micro Via, and Burried Via
This is my very first time doing 4 layers PCB layout.
What is actually the difference between Micro Via and Buried Via?
Say I have Layer 1, Layer 2, Layer 3, Layer 4. What I know I use the Through ...
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vote
2
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231
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How do you drill a homemade double sided pcb
I have a PCB that I am prototyping at home and it is double sided.... When I drill on one face the other face peels up a little.
Does any one know how to avoid this problem?
- 338
2
votes
1
answer
5k
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What kind of motor to use in a PCB drill?
I'm trying to use this super-cheap PCB drill that I bought recently, but it's too weak for human convenience (takes about 10 seconds to get through standard 1.6mm FR4).
The drill uses a small DC ...
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