Hendrik's CNC router

[joecnc2006]

Originally Posted by Mister H Joe, do you mean adjustment to adjust te tension/alignment of the angleprofile (and the bearings) according to the steel rod, or adjustments to be able to adjust the position of the steel rod?

Bolts to adjust the Bearing blocks to the Pipe Rails.

Here is a link to the files you can download and also see the machine in 3D, use solid works free e-drawings viewer.

In the picture Note the 4 Bolts on the side of the Gantry.

http://www.lumenlab.com/~joe2000chev...odel_2006_R-1/

Joe

[Menno]

Originally Posted by Mister H some photo's of the parts I've bought and made. The electronics aren't completely ready yet (still waiting for the LMD's to arrive). The spindels are tr14x4 spindels and the steppers are 1.7Nm from stappenmotor.nl

Nice project! just one question,
where did you get the Tr14x4 spindles from? (I'm from the Netherlands too)

[Mister H]

I bought the spindels at overtoom.nl. The only thing that is different is that tr14 normally has a 3mm travel/turn and this one has 4 (not a standard type)
http://(http://www.overtoom.nl/bedri...k_c_4418.html)

I didn't had much time as I had hoped, but still the building has started now

plans: cutting the mdf-board to the right size according to my drawings

picture 1: the sloths in the sides

Picture 2: copying the shape to the other side

Picture 3: 1 side almost done

Picture 4 the y-axis put together without nails/glue etc. talking about a nice fit

Then my time was out so I couldn't cut the openings in the y-axis any more.

[Mister H]

I'm back from a 10-day holiday and I hope to be able to continue building soon.

I've got a electronics question. If you for example have a power suply that is arrangable from 0-30V and max 10A. can you easily modify the output voltage to for example 15-45V and about 10A?

[erikkate]

Originally Posted by Mister H I'm back from a 10-day holiday and I hope to be able to continue building soon. I've got a electronics question. If you for example have a power suply that is arrangable from 0-30V and max 10A. can you easily modify the output voltage to for example 15-45V and about 10A?

That's not what i would recommend, I would go for a big transformer, a rectifier and a simple capacitorbank, this would be sufficient. Big transformers are easy to find around look at 'de kringloop', or at auction sites in Holland like marktplaats.nl. Using / Misusing a arrangable power supply is not the way to me.

Looking good though! Ga zo door!

[Mister H]

So the building continues...

Last week I continued with the Y-axis. The y-ax torsion box is almost finished (photo's will follow soon). Tomorrow I hope to be able to completely finish the Y and the the z-axis partly and to start with the x-axis.

I was thinking about the electronics since I received the LMD's last week (thanks rené ). How much Ampere is going trough the wire bridges of the PICstep from allan? I didn't think about it when I built it and used some thin wire (0.15mm). but if all of the max. of 3A goes trough it, I should use about 0.5mm2 I think? I want the drivers to be able to give the maximum current of 3A. Anybody who knows the answer?

Thanks in advance and I will post the photo's soon...

[Mister H]

So.. Í'm sorry for not continuing the build report.
I have been very busy with the electronics and getting them to work.
It hasnt succeded though The transformator is working as is the interface card. The PICsteps are giving me a headake.

Meanwhile the buiolding of the machine has continued as well.
I finished the x and y axis. except for the spindles.

Some extra info:

The x-axis uses vertical plates on which the angle iron with the bearings are mounted. Thes vertical plates are fixed in 2 directions by the surrounding plates. I can adjust the position and angle by the bolts on the outside.
The y-axis uses the same principle.

I think that i'm gonna use sliding bearings for the z-axis.

Í also have a topic on Pminmo's site concerning my problems with the PICstep.
If somebody could help me I would really appreciate it.
John (from Pminmo) is already helping me as well, but more people know more ay

I can't give a direct link atm since john is changing webhosts and the board is down.

[Mister H]

and some more pictures...

I like my Makita machines..

[Mister H]

Hello fellow engineers/machinists,

The building lies on it's back atm, since I've got some problems with the electronics.

In this thread the problems can be read:
http://www.cnczone.com/forums/showthread.php?t=45801

At the moment the motor can turn both directions, but i still have troubles getting everything to work properly. The One thing i'm not sure about is the force of the motor as well as the low-speed steps.
When i joggle the motor with high speed then i can't stop the motor by hand(it is to strong), but when it stands stil and i put my finger just against the shaft (not even holding it) and i joggle, then it can't start and keeps on the same place jumping 1 step forward and the backward again.
I think this has to do something with the software settings.

Who can give me/help me with the settings for the following situation:

-I'm planning to cut wood with it.
-the spindle is 14x4 trapezium (4mm per revolution of the spindle)
-max speed???
-max acceleration??
- motor is the following:1.7Nm, 200steps/rev
http://www.stappenmotor.nl/Datasheet...0F%20serie.pdf
-i'm planning to use 1/8th step. ( so probably 1/4x8x200=400steps per revolution?)

[Mister H]

Hmmz, not much response yet.
I'll post it in the software section.

This is how i'm planning on connecting the stepper to the spindle.
It is this complicated since the stepper has a 10mm shaft and the core diameter of the Tr14x4 is a little smaller so I can't just connect it.

The idea is that i place a thread M8 on the end of the spindle.
On this thread I place a connectionpiece with M8 hole in it, which I lock with a M8 nut. This way I can place a big enough bearing on it. the bearing I fix with a washer and a M16 nut. The end of the connection piece is 10mm again so the flexible coupling fits on it and connects the spindle with the stepper.
I have to drill holes (not drawn) in the bearing housing in order to be able to fix the flexible coupling.

Any comments /suggestions /remarks?

[joecnc2006]

not sure why you need it so complicated, just connect lead screw directly to motor shaft with the coupler you have shown

[Mister H]

The reason why it is so complicated is since the core diameter of the trapezium thread is smaller than the diameter of the coupling. In order to be able to place the bearing right I have to have a straight,smooth shaft (smaller than the core diameter of the thread), but then I can't use the coupling any more since it is to big then.

Gr.