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Here is work on the encoders.
I removed the old 2 channel encoders. I replaced them with 3 channels with an index (Broadcom HEDM-5540).
I used the old PCB boards because the chip there (AM26C31Q)...

Gantry (Y-axis).
https://youtu.be/CuUyTP2g-7M

In the end, from everything I read, I understood that despite many advantages, ceramic bearings have one big disadvantage. Load ratings are lower for an all-ceramic bearing as compared to an...

I have a question. I need to replace the balls on the HGR25 carriages for preload ZA.

I'm reading positive reviews about replacing carriage steel balls with Silicon Nitride Ceramic Balls (Si3N4)....

I continue work on the gantry forms. I have already made all the shapes. I will pour it not straight. Turned 90 degrees, lying on the Y rails.
For maximum flatness (under the Y rails) I use my...

Yes, the fibers make mixing a lot more difficult. You're right.

But I don't think that they are not useful. For machine beds, they are perhaps superfluous. But I also use them for a gantry.
Check...

Hi jackjr-123,
Fibers - mainly to prevent the appearance of microcracks.
Shrinkage reducer - reduce concrete shrinkage to 0.5mm per 1 linear meter.

I quote one of the documents below:

...

I have edited the video to include the broken mixer and why. It should be known that this arrangement with the stand and the mixer fixed is incorrect and leads to breakage.
This is the new link for...

:) Minimum 1 month.I can get the top and side shapes out earlier.
But the bottom plate requires lifting the entire form and flipping it 180 degrees. There I think in a month and a half.

Hi Peter. I don't think so. The percentage is too small for that. I use them rather against the possible appearance of cracks.

Here is the used recipe and the broken hand mixer.

Today me, my son and a friend poured the mold. It was quite heavy. Very difficult material to work with. It looks liquid but is very solid. It's like there's a hard crust on top and it can't be...

Hi Peter.
It is very difficult to use paste (non-liquid) in the tight spaces between the bolts. I can only use a brush and a brush. I already primed with PLOPP.
I have no information if it needs...

If anyone is interested.
3 days ago I made concrete samples with several different concrete mold releases. These are the results.
The liquid paraffin is applied very evenly, without drops....

Leveling table for casting to 0.15 mm with various pads under a granite table. This is just rough leveling. Then, during the installation of X rails, there will be a fine leveling with an precise...

And today's optimization.

Ordinary rotary(drum) mixers are not suitable for UHPC concrete. Especially if micro fibers are used. I removed the paddles from my mixer. I hastily welded a stand for double hand mixer from some...

Very good idea ! Yes, it will reinforcement the shape when flipping and de-casting the base (the face of X base).

Thank you !

Catahoula, I will try to be very careful :). I will use PLOPP mould release agent.
But there will probably be some minor chipping along the edges that will be fixed later. Today I'm going to do some...

The bases for the x and y rails arrived today. Processed on a flat grinder (I don't know if this is the correct name in English)
Since the working length of the grinder is up to 1000 mm, but X is...

The mold for X is almost ready.

Peter, I took your advice and bought polyester body filler :)

Thanks Peter !
Here are the molds for internal castings (X base).
From three pieces glued together to achieve the required thickness (95mm and 75mm).
XPS Fibran and chipboard. This was necessary...

These are the casting molds. There is a lot of work on them. Lots of steel tubes (10x1mm) for the through bolts. They will remain in the cast concrete. Today I start making the molds.

OK Peter.

HGH25CAZ0H ball diameter - 4.748mm at temperature about 22 degree celsius.
Only one ball was measured - several times. The value does not change.

So far I can't find any information about the diameter of the balls for HIWIN HGH25.
I found only about some Chinese brand SNWNYN in which they write about their HGH25 - ball diameter 4.763mm.
I...

Thank you so much catahoula for this info. Ok, I will want steel balls for ZA preload.

P.S. I'm impressed with the very stiffness machine you've made.

Ok. I will do that. Thank you !

Happy New Year !
Yes Peter, I wanted to buy blocks with ZA preload, but in Bulgaria, the HIWIN distributor offered a only Z0. They are mass bought . They told me that for a router preload Z0 is...

continue....

Hi All,
first exuse me for my bad Englsh. There will be a lot of mistakes and poor expression.
At the beginning, I want to thank to Peter(peteeng) for the help he gave me over the years with...