problem with HIGH-Z S-1000 CNC ROUTER AND CNC ENGRAVER WITH TRAPEZIUM SPINDLES

[howser37]

There will be other people that know about building CNC machines that will chime in in a bit, i am only posting as i am an owner of a similar model the S1400 by Heiz, so i have a very good idea of your setup.

Luckily the S1400 has Hiwin 15mm to backup the round rail on the X axis on my machine so it is rock solid on the X, however on the Y axis Direction i have a similar issue as yourself, i have not measured the movement but i would guess at 0.25 + by feel when enough force is placed at the bit, i am lucky that as i cut neary 100% HDPE that this doesnt come into play as such as it is like cutting butter and i doubt much force is ever presented.

Notice that i said in the Y axis direction rather than it actually being on the Y axis, i would suggest you double check as i initially thought it was the Y axis bearings but it is actually sideways play on the 2 Z axis bearing blocks on my machine. If you get your fingernail on the edge of the bearing you might be able to feel the movement, it is very small but this is obviously magnified at the bit.

As far as replacements, i am not sure whether Heiz would be particularly helpfull from what i have heard and how easy it would be to replace them i do not know, i certainly dont think it is an easy job on this machine, from what i have heard elsewhere.

If i was going to sort mine out i think i would build a whole new gantry with Hiwin rails on the Y and Z to match the X, however as you have all 3 axis to do, you may be bettter selling it and upgrading to a better machine if you need good accuracy, i mosty cut basic panel shapes and edges are hand finished so it is not so important to me.


I have read about this being a problem with a few Heiz machines on this and other forums that after a few years some play is introduced

As far as the weird sound and the mill stopping moving that may well be the acme screws binding against your anti backlash nut and causing the steppers to stall, the reality is you just cannot have these too tightly adjusted, obviously you want to get as much mechanical backlash out as you can by adjusting the nut, but try and squeeze it down too much and you will get binding, also whats good for one part of the Acme Screw might be too tight further down.

I know that is the case on mine as obviously the threaded Screw is not perfectly accurate.

You will have to knock off the rest of the backlash with the anti backlash in mach, you just arent going to get the mechanical backlash that low on the S model which doesnt have ballscrews.

Regarding being able to spin the screws, it depends what you mean, if you mean that mm of slack either way with the steppers powered down, then thats just your backlash, if the Steppers are off you can move the whole gantry up and down with a little force, with the steppers powered up i cannot move mine at all.