Questions tagged [drill]

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Help choosing motor for a fruit cutting machine

I want assistance in determining an electric motor type suited to building a device for palm oil harvesting. Here is an example of one working palm cutting machine. This machine works similar to a ...
visahl's user avatar
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1 vote
3 answers
5k views

How to convert cordless tool to corded tool "properly"?

This question is the closest thing that I found similar to my needs, but it is still quite far from the answer I need. I have 2 cordless power drills, a 12V green Bosch and an 18V DeWalt. Their ...
virolino's user avatar
  • 439
0 votes
1 answer
102 views

Altium hole tolerance vs IPC hole tolerance

I would like to start using the hole tolerances in Altium to provide more information to my fab house. What I'm trying to figure out is the interaction with the IPC fabrication allowances I have ...
Kontakt's user avatar
  • 61
2 votes
1 answer
206 views

Help to ID this SOT-89 component

I need your help to try to repair a battery charger of a Black & Decker drill. The charger is composed of two devices; one is a simple power supply, and the second one is the BMS. Unfortunately my ...
itseeder's user avatar
  • 121
3 votes
4 answers
194 views

Drill motor improvement to avoid component wear when shut off

Story Get my hands on two Metabo (made in Germany) cordless DC battery powered hand drills previously thrown away because of..... the batteries, how sad. The overall construction is simple however ...
Codebeat's user avatar
  • 1,326
0 votes
0 answers
177 views

How to make a dimmer that doesn't depend on the load's resistance?

I have an angle grinder which has a maximum power of 950 W. My country provides 220 V as voltage source. It has only one speed, so I want to make a dimmer to control its speed. I used this circuit but ...
Bassem Faris's user avatar
6 votes
1 answer
332 views

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 ...
wisner's user avatar
  • 207
0 votes
0 answers
217 views

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 ...
Jordan Isaacson's user avatar
0 votes
0 answers
109 views

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 * ...
TheWillderness's user avatar
1 vote
1 answer
125 views

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 ...
Pere's user avatar
  • 117
0 votes
2 answers
114 views

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 ...
plu's user avatar
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1 vote
1 answer
203 views

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 ...
Josef Kufner's user avatar
1 vote
4 answers
1k views

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 ...
plu's user avatar
  • 683
19 votes
3 answers
3k views

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 ...
Mick Kelly's user avatar
1 vote
1 answer
274 views

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 ...
Marco Svizzeri's user avatar
0 votes
0 answers
98 views

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 ...
friendlyengineer's user avatar
0 votes
2 answers
109 views

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, ...
kellogs's user avatar
  • 1,072
0 votes
1 answer
4k views

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 ...
APM's user avatar
  • 83
0 votes
1 answer
548 views

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 ...
Suvi_Eu's user avatar
  • 851
0 votes
1 answer
968 views

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 ...
user1270949's user avatar
3 votes
2 answers
33k views

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 ...
aymane's user avatar
  • 91
4 votes
3 answers
2k views

Hole drill sizes >1mm in Eagle?

I am currently trying to build a package for a through-hole potentiometer in Eagle Cad and I want to incorporate holes in my PCB for the metal tabs on the side of the pot. I determined that these ...
Andrew Schroeder's user avatar
-1 votes
1 answer
70 views

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
Rene VanDerVeen's user avatar
0 votes
5 answers
4k views

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 ...
Luis Nascimento's user avatar
1 vote
2 answers
2k views

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 ...
sa_leinad's user avatar
  • 681
0 votes
2 answers
2k views

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....
some user's user avatar
  • 119
0 votes
1 answer
63 views

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, ...
user162889's user avatar
0 votes
1 answer
3k views

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 ...
user avatar
1 vote
2 answers
684 views

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 ...
user avatar
2 votes
0 answers
474 views

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 ...
MrCheatak's user avatar
  • 121
0 votes
1 answer
1k views

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 ...
Izidor's user avatar
  • 3
2 votes
0 answers
551 views

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 ...
Dee's user avatar
  • 369
0 votes
1 answer
715 views

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 ...
user avatar
5 votes
4 answers
7k views

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 ...
raviani's user avatar
  • 95
1 vote
2 answers
254 views

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?
DarthRubik's user avatar
2 votes
1 answer
5k views

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 ...
boardbite's user avatar
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