Why choose a DIY router table over a manufactured version?
- Typically cheaper. Obviously a lot depends on what you make it from (phenolic-laminated HD-MDF versus bare MDF from the local big-box) and what you add to it (commercial mitre gauges, fences etc.).
- More feature-rich (if desired). Some people are happy with very basic router tables because they provide all they need1.
- Only the features you want and no others.
- Infinitely adaptable with basic woodworking tools and skills.
- Can be more stable. Particularly (but not exclusively) lower-cost router tables are neither as robustly built nor as stable as you'd like. Obviously dependent on materials choices and build quality a homemade router table can be small but heavy and completely resistant to racking if put together properly.
- Satisfaction of having made it yourself.
I will be appreciated if you share what are included in your self-built router table plans that are advantages over those from equipment companies.
One of the chief advantages a homemade router table can provide I think is a split fence. Split fences are available on commercial router tables, but generally not at the budget end, and even when they are provided they can be a little wobbly.
1 Strongly recommend you go this way initially, then figure if you need more features after actually using the table for a while. Many of the "Oh that's a good idea!" features are just that, a good idea and of little day-to-day use to the average owner (just as many of the router bits in a typical set will see little or no use with most buyers).
The most basic of all router tables is a sheet of some board material (doesn't matter so much what it is) with a hole roughly in the centre for the bit to poke through, clamped to the edge of an existing table. The fence is provided by a straight piece of 1x2 clamped to it. Yes this really is enough, and for many it means it can be built entirely from scraps, giving a total materials cost of $0/£0/€0.