Abaut CNC

fiolledapool

fiolledapool

AzB Silver Member
Silver Member
.06MM positioning accuracy won't cut it.
Imagine your shaft is .06 to .12 undersized or oversized.

750MM travel won't cut it either. No room for the dead and live centers.
 
JoeyInCali said:
I don't so because you will need a lot more Z clearance for the 4th axis turning.
Click to expand...

I built my own Gantry CNC years ago which has a 10" Z travel. I must say though that I seldom use more than 3 or 4 inches. It's not the Z's travel that is the problem but the clearance from the lowest travel of to the bed of the machine. As Joey has stated, once a 4th axis and tail stock are mounted your Z axis is already at it's upper limit. This can be worked around however with a little ingenuity. 4 short legs can be added to the base of the machine so as to raise it some so that another bar or piece of aluminum mounted to the underside of the rails extending some from each end. The 4th axis and tail stock could then be mounted to this bar so that when a cue is mounted between centers it will be just over the base making the four inches of Z travel plenty for working on cues.

Dick
 
fiolledapool said:
:frown: Z is little true, however Joey you think that this cnc is good for cuemaking??
Click to expand...


Will this machine work for cues? Yes, the x axis long enough. If there is 1000mm of travle. In US we work in inches. I believe that is about 39 inches and is plenty. You will want to make sure where ever you place your spindle and tailstock that the travle will reach the dead center and the live center in tailstock and optomised for that area. You will need to add a spindle and tailstock if you want to turn shafts. I notice that the controller does not have a 4th axis. It looks to have a port to drive a spindle. Find out what and how that is used. You can drive the spindle for the shaft or handle with a variable speed motor not controlled by the computer. This machine would not be my first choice but with some work will do the job.

Jim.
 

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guys, will be fine this measures :

37" (X)
25" (Y)
10" (Z)

I want mount one 4th axi with a live center and indexer and small table for inlays
 
Andreas,

The HeiZ machine is OK even if it has a little low on Z axis travel. The way to
compensate for this is to mount the 4th axis a little lower than the frame
which the machine is made up of.
This was a machine I was considering my self with the mentioned work around.
However, be aware that the machine is sold with a very basic control program
WinPCNC which is a all German program. No support in English at least when
I was looking at it.
I have also a friend which tried to build one of the 1000 model versions over
to run on Mach3. He had plenty of problems with the transformation and burned
the controller box/Stepper driver combo box and gave up.

However, I know others which has bought good stepper drivers and used
the machine with the USBcnc setup and are happy users.

Be aware that the Kress is used and not a high end spindle so it might be
something which you need to change if this is not good enough for you.
Note that changing to a heavier spindle puts more strain on the Z axis motor
and you should not expect to cut in metal without the Z axis flexing.
The flex part is something another user told me but for normal wood you should be fine.

Hope it helps and that you finally find a setup you can use and afford :-)
 
JoeyInCali said:
.06MM positioning accuracy won't cut it.
Imagine your shaft is .06 to .12 undersized or oversized.

750MM travel won't cut it either. No room for the dead and live centers.
Click to expand...

.06MM is only .002 IN That is thinner than a sheet of paper.
 
The problem is not whether or not the joint is +-.06 mm but can it really repeat to that.
Apart from that the simple inlays can be refitted but a complex shape will look funny with more or less glue line.
For me personally, a .06mm accuracy is not good enough. 0.01mm accuracy will work with most things.The other thing to consider is the overall rigidity of the machine.
Neil
 
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