Search:

I had no problems with the draw bar. I let the preasure off the draw bar by unturning the pull stud Nut and before the end of thread runs out the pressure is zero. Definalty take care here. And count...

Find concrete design course material from civil engineering department. A second year concrete class is very relevant to epoxy granite. This will help understand how to mix and grade the aggragates...

Becareful buying hiwin on aliexpress. alot of fake products.

i bought hiwin blocks and rails from automation-overstock very good quality and service.

You should do a long term test for creep with different post curing. Some polymer concrete maybe ok for routers.


The Raw material cost 1x
Labour cost in casting and mould prep 10x
Geometric...

After removing all the bearings cleaning and reinstalling them in mutiple positions i still have 0.03-0.06mm run out at the top bearing when spinning on the bottom bearings.

I think my shaft is...

Some photos from tear down.

Bearings are snfa 60x35x14 vex35 sq5ceDD 15deg high presicion abec 5 angular contact bearings. 2.5um ecentricity markings on inner race. 1um and 0um on outter race.
...

A1. Pot life mixed with filler is long. I didnt see any exotherm

A2. Measure volume of mould convert to mass using 2200kg/m3 epoxy granit s.g then resin/aggregate 12%/88%

A3 mix in electric...

Goes realy good. Eg is perfect material for high speed machining. I get some video. Upgrading spindle to 10hp bt30 currently.

Keep going with linux. A little bit each day and you'll be running in no time. Skip the atc until you understand how to program it. Mesa and linux will be very good machine when setup. You can change...

Im so happy to find your photos of the hsd spindle! I am trying to get the top bearings off to clean/replace. How do you lock the drawbar tube to undo the draw bar spring nut on the top? And is this...

First cuts have happened. T-sloted table being machined. Waycovers have been difficult to fabricate.

Any kind of plastic would be better than sealing wood moulds. I used glass and this gave superb finish and reasonable flatness. Exotherm isn't a problem once you have large mass and only 12% epoxy it...

Good choice for lathe material. Lots of Gang Tool lathes use polymer concrete bases.

Ok i will do this for starters. What do the spare pins of the db9 plug do? think they say ground wires. Could i run a input to g540 loop thru them that would detect if the cable was disconnected. Not...

When faulted is ok as i can get a signal to release/clamp the brake from g540/mach3. But how can i get a fault signal if i cut a motor cable. When i disconnect motor cables now from g540 i get no...

Hi,

Is there a way to have the g540 fault if power to a stepper motor is lost?


i have a heavy z axis i need to release a brake and what to be fail safe in all circumstances.

Or a...

Standard epoxy self leveled is good to about 0.2mm /600mm. Better than the steel but can be scaped to be better if you have a strait edge or steel wire setup. Its a good start to getting close to an...

Table cast 100mm deep with 7075 plate for top surface. Wired vfd and control in new cabnet. Alignment of z axis to y axis and table to fit.

The aggragtes and fines used in concrete (cement) can be used in epoxy granit. Large stones 10-15mm down to fine sands graded to fill the voides. Sharpe stones add strength but make it harder to mix...

The max accuracy of laser ccd tracking im going to call it laserbcam is very good 0.005mm/600mm. Roll measurement with ledbcam +-5arcsec a little better than my starret machinest level. Im working...

10k images later I think I have accurate data on all the axis. Bcam is good for measuring roll angle only.

I converted the lasers back to a laser autocollimator with ccd tracking using the bcam...

The main reason to use epoxy is stability. Cement is forever drying and gaining strength 20+ years and its still drying. There is also significant creep long term in cement based concrete.

Cement...

I vote z axis.

Servo will give good positioning and low speed torque. An induction motor can be positioned with a closed loop vector vfd. Depends on what you need to do.

They also bind if not mounted flat. Liner rails are not strait when unmounted.

Grinding shimming where needed and epoxy bonding rails for 100% contact. It takes a week per axis or more depending on how accurate you want to get. A surface plate would help. I have just finished...

If you can orientate the axis is the vertical plane for measuring then you can get around sag calculations. Furthermore with one axis known to be strait in the vertical plane you can then measure the...

How is the current/new Trajectory planner. I realy like the idea of setting a follow error in code to keep control. Has it improved accuracy and tool path speed?

Wire is tensioned between ends. In the vertical plane its very strait. In the horizontal plane there is some sag that can be calculated. The longer the axis the more sag
At 0.89m the sag is less...

Alignment begins with a cast epoxy surface. All moulds were poured on this and gave +-0.08mm surface to start grinding.

...