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Hi,
found a local company to sell me an oscillating pump. Up to 55psi and 14l/min. I suspect and hope that at say 15psi I'll get 5l/min. The pump itself is industrially rated, and for my application...

Hi,
I have got my new Delta VFD this morning from the US, its a second hand 11kw unit. I paid as much for it as I would have a new 5.5kW unit....so I thought why not?. If I ever get an even bigger...

Hi peteeng,
that diagram looks incomplete?? I'd swear that the diagram show the outer ring gear, the strain gear and the output bearing ........but where is the wave generator?

It's common that...

Hi,
just whipped around the corner and bought the new 20A three phase D curve breaker, 20A three phase plus neutral isolator/socket/box.....bloody hell.....hope not to have to buy any more soon!!!...

Hi,
just as a sanity check imagine a fifth axis platter with 1 arc min lash. At 100mm radius (from the centre of rotation) 1 arc min of lash translates to 0.029mm linear lash
at 100mm.....and that...

Hi,
very wise to test them out, I suspect that 10 arc min lash will put you off. There are better brands but the cost goes up bigtime.

The two gear reducers I have used for my trunnion and fifth...

Hi,



You are 100% correct. Most breakers and fuses are effective inn high current fault situations but poor in mild overload conditions. 99% of our electrical system and all our appliances are...

Hi peteeng,
looks entirely reasonable.

You might be set back a little when you realise the lash of a 5:1 or a 10:1 planetary gearbox.

Most single stage (5:1) Chinese made ones have a lash of...

Hi,
well some Googling and there certainly are three phase RCD's. There seem to be two common types, one that trips at 30mA and another at 300mA.

I would assume that the 30mA version is intended...

Hi,
well it just seems that Americans blatantly and obviously break their own laws, and then BS and bluster to get out of it....it makes you wonder whether you should pay
any credence to their...

Hi,
the 20A breaker is supposed to protect the house wiring....not your machine. If you want various sections of your machine protected then you should put electrohydraulic breakers IN your machine...

Hi,
yeah, 180mm wide, 150mm tall and 100mm thick. Weighs 14kg now and will be down to about 11kg by the time I machine it.

The spindle diameter is 100mm, ie the hole up the middle needs to be...

Hi,
just got my spindle mount steel profile cut. It is 100mm thick and was done with oxy-acet. Very impressed, little to no dross and a very small, say 1mm taper over 100mm. I expected
good but...

Hi,
for decades prior to closed loop steppers being available open loop steppers were used to complete satisfaction. The only time an open loop stepper misses steps is if its overloaded,
thus if...

Hi,
Mach4 has 12 axes, six (X,Y,Z,A,B,C) are coordinated and six OB(Out-of-Band uncoordinated) axes, OB1 thru OB6. You might consider that Mach has one other motor output, namely a PWM output. The...

Hi,
I think you misunderstand.....you could use Step/Dir without any extra hardware, the MB3 has plenty to spare. None-the-less I think just programming the drive in velocity mode
is still...

Hi,
I have a second hand 1.8kW Allen Bradley servo for a spindle. 99% of the time I use it in velocity mode, that is to say I give it an analog voltage 0V-10V and it spins from zero rpm to...

Hi,
I use Delta VFD's (Taiwanese brand made in China) and have always had good results. I do not like nor do I trust el-cheapo Chinese made VFD's.

This is from the MS300 manual (of my new VFD)
...

Hi,
measuring the output voltage of a VFD is very problematic. It is not, as you might believe, a sine wave. It is in fact a PWM modulated square wave and without at the very least an oscilloscope...

Hi,
are you 100% sure about the part number of the stepper fitted?

That part number (34k104s-lw8) is a stepper that has 10.2mH inductance....and that is poor to very poor for CNC use, it'll be as...

Hi,
there was a material that has been used as a look-a-like ivory for many years.

It was a plastic based on casein. First developed in the early 1900's it was very common through the 50's and...

Hi,
how do you define 'too expensive'.

I gotten servos from China, about 8kg with both Fedex and DHL for $156USD and $160USD respectively. I've just paid $186NZD or only about $112USD for a 7kg...

Hi,
the only problem with the part as is .........is that its in the US, and it will cost a bomb to get it to New Zealand.

The part I linked to is identical to my fourth axis gear reducer and it...

Hi,
I wanted a gear reducer/gearbox with which to make a fourth axis.

A genuine fourth axis, even from China, are way too big, too heavy and too expensive......and so were just not suitable for...

Hi,



Not really. Mach4 does have quite a few videos so that part is reasonably well covered. Its the practical wiring of the controller to the servos that will give you the most...

Hi,
sounds like the battery that maintains the real CMOS clock has gone flat. Its common with machines of this age. Unfortunately its not as simple as just replacing the
battery......critical data...

Hi,
I have been experimenting with different arrangements.

The coil needs to be about 40mm in diameter, big enough to easily fit over the tool holder nose, but small enough that there be good...

Hi,



You are already there.....get the kids to show you.

There is some stuff that many find tricky, like interfacing the Step/Dir outputs of the breakout board to the servo drive. The servo...

Hi,
I don't use plasma so I cant be 100%.

Firstly I'd recommend Mach4 over Mach3 any day. Secondly Warp9 sell a 'WarpRunner' board which is a combination breakout board and high dynamic THC...

Hi,
well as far as I can tell the drivers ARE Step/Dir type and thus any Step/Dir type controller could be used, which includes Mach3/Mach4 and an Ethernet Smoothstepper or newer Flashcut...