Go Down

Topic: Share tips you have come across (Read 124788 times) previous topic - next topic

larryd

#525
Apr 22, 2018, 08:27 am Last Edit: Apr 22, 2018, 09:12 am by larryd
I have used caarbide drills but find they break too easily even when used in a drill press.
The dremel drill press does not seem to be rigid enough and there is a fair amount of runout on my dremel as well.

Can you use those by hand ?
Yes you can use these by hand.


I use a full hand held cordless drill with these bits (@ slow speed).

They are 'very very' much less susceptible to breakage as PCB carbide bits.

I mainly use 20 and 30 degree bits with hand held drilling.

These bits are my 'go to way' for drilling plastics with no melting, burning, or cracking.

For larger diameter holes, I first drill a starter hole with these bits then adjust the size with a reamer:





I am sure you will be pleasantly surprised with the results.



These bits are also good as a vero board trace cutter.

I use the 30 degree bit for this.







No technical PMs.
If you are asked a question, please respond with an answer.
If you are asked for more information, please supply it.
If you need clarification, ask for help.

JMeller

I have used carbide drills but find they break too easily even when used in a drill press.
The dremel drill press does not seem to be rigid enough and there is a fair amount of runout on my dremel as well.
True (yet, frustrating) story;  I have found a dremel setting of 1/4 speed works well accompanied by cleaning the PCB remains from the bit, every 10th or so hole drilled, works well- when slowly press cutting through the board.

Boardburner2

I found a pcb made by cif which has a paper core and glass skin . This drills quite well with a steel bit without blunting too much.With vero i tend to stick with paper boards.

larryd

#528
Apr 28, 2018, 08:43 am Last Edit: Apr 28, 2018, 08:50 am by larryd
Make heat shrink samples ahead of time.

Cut 1" pieces of different diameter heat shrink.
Shrink about 1/3 the length.
Keep these samples handy when you are deciding which diameter to use in your application.






No technical PMs.
If you are asked a question, please respond with an answer.
If you are asked for more information, please supply it.
If you need clarification, ask for help.

larryd

#529
Apr 28, 2018, 08:47 am Last Edit: May 28, 2018, 10:50 pm by larryd
Make tool tip protectors.

My original tweezer tip protectors don't seem to last very long.
Make your own protectors from of 4 to 1 heat shrink.
The 4 to 1 ratio makes a nice thick long-lasting protector.






It might be a good idea to add heat shrink to the original protectors as soon as you buy the tweezers. ;)



No technical PMs.
If you are asked a question, please respond with an answer.
If you are asked for more information, please supply it.
If you need clarification, ask for help.

larryd

#530
May 02, 2018, 02:47 am Last Edit: May 02, 2018, 02:47 am by larryd




No technical PMs.
If you are asked a question, please respond with an answer.
If you are asked for more information, please supply it.
If you need clarification, ask for help.

Henry_Best

To reduce the evaporation of solvents, keep sealed bottles in the fridge.

allanhurst

Larry - where can I get the cool tool you show in post 525?

Allan


larryd

#534
May 02, 2018, 09:07 am Last Edit: May 02, 2018, 09:44 am by larryd
Lots on Ebay, Banggood and Amazon.
They are nice for tuning holes, especially in plastics.


This is where I got the Reamer.
Out of having 4 of these, one was dull from the start.
https://www.banggood.com/Universal-0-14mm-Professional-Reaming-Knife-Drill-Tool-Edge-Reamer-p-922461.html?rmmds=myorder&cur_warehouse=CN


This is also a good tool to have, but the above reamer has finer action:
https://www.banggood.com/4-12mm-Titanium-Steel-Alloy-Multi-level-Reamer-Reaming-Tool-with-Cap-p-1110255.html?rmmds=myorder&cur_warehouse=CN






No technical PMs.
If you are asked a question, please respond with an answer.
If you are asked for more information, please supply it.
If you need clarification, ask for help.

larryd

#535
May 02, 2018, 09:48 am Last Edit: May 02, 2018, 09:53 am by larryd
To reduce the evaporation of solvents, keep sealed bottles in the fridge.
If you can sneak them in the fridge.  :smiley-sad:


I was looking at these a while back for storing Methylene Chloride.




No technical PMs.
If you are asked a question, please respond with an answer.
If you are asked for more information, please supply it.
If you need clarification, ask for help.

larryd

#536
May 03, 2018, 08:22 pm Last Edit: May 03, 2018, 08:23 pm by larryd
The internet is great for looking up reference material.

I keep a copy of this PDF manual on the iPad.
It covers many SMDs.
http://www.sphere.bc.ca/download/smd-codebook.pdf

There are many other offerings that you can review.

http://www.digikey.com/Site/Global/Layouts/DownloadPdf.ashx?pdfUrl=6B438F7BA5DC49E28D08B066465ABBB9

http://www.talkingelectronics.com/ChipDataEbook-1d/html/SM-Transistors.html





No technical PMs.
If you are asked a question, please respond with an answer.
If you are asked for more information, please supply it.
If you need clarification, ask for help.

larryd

#537
May 11, 2018, 01:37 am Last Edit: May 11, 2018, 01:43 am by larryd
For some projects I set PCBs in place with UV glue.
You get a semi permanent hold within seconds.
After positioning the PCB, add a few drops of glue, expose to UV for 5 seconds.
UV glue is not very good for gluing pieces that are to be permanent.

Lots of sellers on eBay, Banggood and Amazon.






No technical PMs.
If you are asked a question, please respond with an answer.
If you are asked for more information, please supply it.
If you need clarification, ask for help.

larryd

#538
May 11, 2018, 01:37 am Last Edit: May 13, 2018, 07:43 am by larryd
The UV light must be able to see the glue for it to cure.
If the glue is in between the PCBs, it will not harden.



Use UV glue to hold magnet or wire wrap wire in place when doing mods on PCBs.






No technical PMs.
If you are asked a question, please respond with an answer.
If you are asked for more information, please supply it.
If you need clarification, ask for help.

ted

#539
May 13, 2018, 02:09 am Last Edit: May 13, 2018, 02:11 am by ted
The SMD code book is great I didn't know it exist, I discovered that google is faster.
example - smd 1a on google images.
.

Go Up