Messages

5111

General Mach Discussion / Re: Using two uc100, with mach3. gecko540 and mach3 interfaceboard.

« on: March 05, 2018, 05:03:47 AM »

Hi,
THC is time critical and it is handled in the controller rather than Mach but I think you'll find the UC400ETH does it well.

Craig

5112

General Mach Discussion / Re: Mach3,ESS, Boss 5 limit switches not recognized

« on: March 04, 2018, 11:04:10 PM »

Hi Rick,
that depends on your BoB. Most that I'm familiar with have a supply for the switches and other logic circuits.
Just be careful not to heavily load or short it to earth...you may let smoke out if you do.

Craig

5113

General Mach Discussion / Re: anilam 3000 retro fit?

« on: March 04, 2018, 11:01:26 PM »

Hi,
best I've found is a pic of the drive and they look to be analogue input.
Ordinary analogue to digital and digital to analogue is, with most hobbyist controllers, 10, 12 or maybe 14 bit.
Eminently suitable for measuring temperatures and other sensors but not nearly quality enough for analogue servos.
For analogue servos you require high linearity 16 bit conversions or suffer significant loss of position accuracy.

The boards already recommended are the only suitable boards with the high quality analogue conversions.

Craig

5114

General Mach Discussion / Re: Will not zero machine coordinates

« on: March 04, 2018, 10:53:38 PM »

Hi,
you cant set different axes to have different units, either they are all metric or all imperial.

Craig

5115

General Mach Discussion / Re: Mach3,ESS, Boss 5 limit switches not recognized

« on: March 04, 2018, 10:45:05 PM »

Hi,
one advantage of doing that, namely one pin for each limit switch is that you could use inductive proximity
switches for the four new ones you require for your X and Y axes. There are plenty of cheap ones on Ebay.
They are easy to setup and work well.

The money you save on switches would have to be put towards another BOB, so you don't get away for free!
A fairly simple BOB is all that is required, doesn't need relays or spindle outputs for instance.

Craig

5116

General Mach Discussion / Re: Servio motor Delta adas b2 Software and electronic gear ratio

« on: March 04, 2018, 10:35:06 PM »

Hi,
with the numbers I've proposed the 'step per mm':

1mm / 175mm  gear revs=0.00571428 gear revolutions/mm

0.00571428 * 10=0.0571428 reducer input shaft revs/mm =0.0571428 servo revs/mm

0.0571428 *131,072=7489.82 encoder counts per mm

7489.82 / 10 (electronic gearing denom.)=748.98 Mach pulses/mm

Rounding 'steps per mm'=749 or a resolution of 1.33um, pretty damn fine!

Craig

5117

General Mach Discussion / Re: Z stop errors

« on: March 04, 2018, 10:26:23 PM »

Hi,
it sounds like you may also have an earthing fault. If you attempt to connect a nominally 0V wire to a ground and you
get a flash then your 0V wire is not zero volts at all!

Do you have a sketch of your wiring diagram. If you have two 'earths fighting' strange behaviour results if not outright
damage.

Craig

5118

General Mach Discussion / Re: Mach3,ESS, Boss 5 limit switches not recognized

« on: March 04, 2018, 10:18:18 PM »

Hi,
given that you have an ESS then with a second BoB then you can have another whole 'ports worth' of IO.
Additionally the second and third ports of the ESS are setup with pins 2-9 as inputs, unlike  the same pins
in port one, but that means that with the two extra ports you could have as many as 26 extra inputs!

With a second BoB then you could easily have one limit switch/ one pin and one home switch/ one pin.
With a three axis machine that requires 6 limits and three homes for a total of 9 pins, easy done with
two ports of the ESS and two BOB's to interface to those ports.

Craig

5119

General Mach Discussion / Re: Mach3,ESS, Boss 5 limit switches not recognized

« on: March 04, 2018, 07:44:31 PM »

Hi,
that pic you showed of the Z axis, all those three switches have both NO and NC built in. You will
have to change one wire on each switch if you wish to use them as NC.

I suggest using the X and Y switches as home switches and as home switches alone. If you feel the need
for limit switches for safeties sake the buy and fit another four switches.

Craig

5120

General Mach Discussion / Re: Servio motor Delta adas b2 Software and electronic gear ratio

« on: March 04, 2018, 05:08:53 PM »

Hi,
if I understand your numbers the axis moves 175mm per revolution of the gear.
If you want 12000mm/min travel then:
12000/175=68.7514 rev per min of the gear, or 685.714 revs per min of the input shaft of your 10:1 reducer,
ie 658.714 rpm of your servo.
At 131072 pulse per rev:
658.714 *131072 /60=1,497,965 pulse per second. Thats too fast to signal your servo, I would recommend reducing
the pulse rate required using electronic gearing by a factor of ten:
1,497,965 / 10=149,796 pulse per second. Thats about 150kHz. You could, at a stretch, do that with single
ended signalling.

This would require a denomintator of 10 and a numerator of 1. Easy!