Table size not equal X-calc?

joer18 · February 13, 2026, 4:12pm

Hi,

I’m in the process of mounting the Y on two strips of MDF that will be secured on my workbench.

If I align the belt holders to the outer corners they seem a bit to far from the YZ-0.

The calculator for the LR4 gave me the following measurements:
Table X: 1200 mm
Rail X: 1074 mm
Cutting Area: 908 mm

My table is exactly 1200 mm (X) and my X-rails are exactly 1074 mm:

Am I missing something or should I just secure my Y MDF (the one without tube/rail) a bit narrower? I will have a permanent screw on/off solution but it needs to be precise. Also, I bought the aluminium plates from Ryans “partner” in Germany and they state that the plates are 6 mm instead of V1e that is 6,5, but that is only total of 1 mm. I’m missing 8-10 mm

Also, where I live the sheets are standard 900 mm. I would really like to have that cutting area.

Would a alternate solution be to add washers between the YZ and the X-core (with longer screws and such)?

What is your measurement between YZ-0 and beltholder?

Help is much appreciated!

Jörgen

joer18 · February 13, 2026, 7:31pm

Here is another way to illustrate the “gap” of 6 mm:

Where do I place the Y min belt holder? In the corner or just tight to the YZ-0?

TIA,
Jörgen

Dreyfus · February 13, 2026, 8:36pm

Remember there’s a belt as well, you need to leave room for that.

joer18 · February 13, 2026, 9:01pm

Thanks.

That is absolutely true. As shown in the instructions:

”Setting the Y min distance can be done from the calculator, or

Using a piece of belt on the table to set a one belt gap width, making sure your end to end brace gap is set to the calculated width so nothing changes when you add your strut plate.”

But I’m not nearly as close. In the instructions the piece is placed in the corner. Even if I leave plenty of space for the belt I’m not close.

I’m surely missing something here…

/J

Michael_Melancon · February 13, 2026, 9:02pm

The calculator adds a little extra fudge factor room for you, in case some thing are bigger or don’t line up perfectly

It’s not expected that both sides will exactly hit the end of the table.

You should line up that side and mount it like the instructions say, by looking at where that side lands

joer18 · February 13, 2026, 9:07pm

Thanks for replying!

From the instructions: “…making sure your end to end brace gap is set to the calculated width…”

I’m confused.

/J

Michael_Melancon · February 13, 2026, 9:19pm

Do just like the picture in the instructions with the belt and the clip to find the correct position.

Use a pencil to mark the outside edge of that clip position onto the table.

Use a square to extend that line to the front of the table.

Use that line to line up the bracket and mark the screw holes to mount.

joer18 · February 13, 2026, 11:51pm

Hi and thanks for replying,

I agree that that will probably be how I will get going. Still, I’m curious on how the instructions and the mounting pictures sets the belt holders right on the corners. I also seen others do this. Feels like I really paid attention but still missing something…

I guess that I’m overthinking it, but….

/J

Michael_Melancon · February 13, 2026, 11:58pm

Actually, off the corner…

You can see that the table actually was a little too narrow…

Which I think is what led to the extra mm being added.

The right way is to line it up with the way the machine is built, not alter the machine.

An extra few mm on the edge won’t hurt anything.

joer18 · February 23, 2026, 12:23am

I placed my belt holders according to the solution in this thread.

Just want to sum up if anyone else is searching for the same issue and like me reading the written instructions like the law book.

Disregard (according to this thread):

From the calculation for LR4:
“This output is the minimum table required - belt holders will be installed flush with the outside corners.”

From the instruction:

The calculator “table measurement” gives you the exact outside dimensions of the belt holders as the footprint.
Setting the Y min distance can be done from the calculator, or
Using a piece of belt on the table to set a one belt gap width, making sure your end to end brace gap is set to the calculated width so nothing changes when you add your strut plate.

Thanks for great project and forum!

/Jörgen