Topics

1

Bargain Basement / pacer hd 8 by 4 1998 £3000 cheap

« on: June 29, 2023, 05:33:15 PM »

yes, still has the old 8 wire cylindrical motors
does have newer drivers and controller
and runs mach3
sadly i think the modern drivers are three phase and so is the machoine
so you may have to change the motors to nema 34's the bigguns
and buy three new drives too and psu's
the controller is a modernish mach 3 driver

cheap

swap plasma table

2

General Mach Discussion / where is the abrasive water jet cutting section?

« on: June 29, 2023, 05:30:48 PM »

thanks

3

General Mach Discussion / so if you cannot connect those nvem network controllers direct to the pc

« on: February 26, 2023, 10:23:07 AM »

even if you set the windoes 11 as a dhcp server
do you still nee a crossover cable

do other network controllers simply plug in? not have to go to a switch.

what a load of old poop

4

General Mach Discussion / plasma table time

« on: February 06, 2023, 05:33:56 PM »

got some linear slidey doofers

want a little plasma table

first question, the linear sliders are solid round
the lengths are 700-800mm
is that ok for a tiddly plasma table?
i have another one as the loose one in the pic
the plan is to widen the lower twin rails parts
to utilise the length of the y axis
then chop down the other one for a z
what length do i chop it too, do i need more than 50mm travel for a plasma?

any one near west london fancy doing some machining

5

General Mach Discussion / hello there - help please, how do you do the light sensor limit switch - 3 wires

« on: February 02, 2023, 05:11:26 PM »

hello i am stuck, have these


data sheet -  i think is

https://datasheet.octopart.com/GP1A05AJ000F-Sharp-Microelectronics-datasheet-7570727.pdf

3 wires
looking down on it from the top pin
1
2
3

 pin 1 Vcc - dont understand = voltage cc
 pin 2 gnd = ground, ?
 pin 3 Vout = voltage out ?

i cant give it 24v

am i connecting it to mach on limits X++ and X--

is it not possible yo use them

i have them on each end of each axis

itching to play with me new toy but buggered the last one crashing the x home!!

sorry

6

General Mach Discussion / just bought a little baby cnc 280mm square davinci style thing

« on: January 29, 2023, 04:04:03 PM »

hello please - been off grid for a fair few years.....
just bought a little machine \/ see pic some german tiny 280mm square thang
the bloody thing has 5 phase 10 wire motors - damn
do they go straight in the bin?
the drivers and controllers 1997 ish - rs232 straight in the bin?

had an old nema 23 hanging about and the bolt pattern is just a bit too small

47mm nema 23 - the machine has positec vdrm 564/50 lna at  60mm bolt spacing
do i simply slot the cheapo nema 23 motors

am i going for 56mm nema 23's with 8 wires and going bi polar parrallel?

anyone in the uk got any little dual shafted little 8 wire nema 23's x3
6mm to 6.35mm blums to do aswell =

bloody thing
nice quality

got one of them network nvem controller break out things, are they worth the hassle

the machine has a 24 volt spindle in it already and a group of relay type things for door open and emergency stop and that but I just need emergency stop and spindle control?


thanks

7

General Mach Discussion / laser cutting NOVICE/ROOKIE question

« on: December 05, 2015, 09:06:27 AM »

I think I am going to buy an old a2, 420 by 600 or 2' by 1.5' laser cutter.
Its an older model, so wish to do the mach 3 conversion to it.
This particular machine has a moving bed.
it is a RF air cooled machine rather than a glass tube water cooled unit.
The first question is.......
I 'think' its a mere 30w laser, the purpose of its purchase is to cut up to 10mm acrylic,
can I not simply 'using sheetcam tng' set the machine to cut in two or more passes?
I.e. set sheetcam to raise the bed on the second and third pass?
seems too simple..................................................
-simply guessing the power can only cut into the material 3-4mm or 1/4 inch at a time,
does it need to blow the dross out the other side? I think it has air assist.
do they actually vaporize the material?

I gather all the smaller lasers machines use nema 17's? - so I stay 24 volts?

last question is, I don't think I am overly concerned of the machines speed,
so - do I need worry too much about laser on/off - How is this actually controlled

Thanks in advance

8

General Mach Discussion / whats with the mini vfd's currently for sale?

« on: September 21, 2015, 03:58:36 PM »

are they the same internal giblets as the earlier things simply packaged tighter?

I think I am wanting a water cooled .8kw spindle = 65mm 4 bearing
 and mini vfd
vfd's state .75kw and not .8kw

is that correct?

I don't want more than 1hp and that's what it is...
says its 2 amps?

next jump at say 1.5kw is 2 hp and pulls 7 amps

http://www.ebay.co.uk/itm/MINI-0-8KW-ER11-WATER-COOLED-SPINDLE-MOTOR-0-8KW-INVERTER-DRIVE-VFD-FOR-CNC-/271881269449?hash=item3f4d62f0c9

just want to be able to switch it on and it be quieter than my mains fed router.

9

General Mach Discussion / pulse output capabilities ess

« on: August 26, 2015, 03:08:15 PM »

http://warp9td.com/index.php/products

erm the Ethernet version says cw and ccw - the usb version says no

do them servo drive doofers want cw and ccw pulse output signalling

anyplops, I have 'finally' bought some sevo motors that match my drives - Panasonic minas a4 @ 200w
maddt1207 and the matching motors

so am I correct in thinking I am buying an ess for mach 4

just been having a read up, my mach 3 is working on windows 10

does that mean mach 4 and ess will work too.
LASTLY
I buy the ess for mach 4 - what else do I need, does the ess plug into something else and then to the drives
thank you

10

General Mach Discussion / hello, just changed computer to a windows 8.1 machine

« on: March 02, 2015, 01:46:40 PM »

anyway, the x axis limit switch used to work, now it does still switch, turns the led on and off on the breakout board - usb leafbox 200 hz xulifeng  thing

but it doesn't bounce back = stays in the emergency stop mode if you like on homing, I then have to switch it all off and pull the axis away from the switch to get going again.

do I adjust the switch mechanically - or is there a setting I can alter

I did have to set the kernel speed to 45000hz to get ot going, as its didn't like 25000 - just wiggled about a bit.

any suggestions? - move the switch forwards?

thanks