Messages

11

General Mach Discussion / Re: cable screening - homing issue

« on: July 28, 2013, 03:18:43 PM »

Adjusted the debounce figure to 2000 and the homing switches now work ok. Thank you all for your help. I will look at changing the cabling to screened, but for now it seems to be ok.

12

General Mach Discussion / Re: cable screening - homing issue

« on: July 27, 2013, 05:56:11 PM »

Should the Index Debounce be adjusted too or just the Debounce Interval?

13

General Mach Discussion / cable screening - homing issue

« on: July 25, 2013, 06:52:29 PM »

I am currently experiencing issue's with homing, the x and y axis move different amounts each time ref all is pressed and mach say they are homed and reset the DRO to the set figure but are clearly not, and the LED is not lit in the diag screen, the same with the z homing but this moves very small amounts, as little as 0.2mm every time the ref home button is pressed, it resets the DRO but no LED is lit either in diag, if I manually jog all axis to the switches the LED then lights up. Recently I have replaced my old BOB with a new one and also replaced the stepper drivers and installed a new 36v psu to power the drivers, the homing switches used to work before installing the new hardware, thinking it would be sufficient I have used 2 core plastic coated cable for the step/dir signals from the BOB also the same type of cable for the power from the psu to the drivers and orange 3 core cable (like you get from a lawn mower) for the main power to the psu, the cabling from the driver/vfd to the motors is the original wiring in the machine. I have read previous posts on noise and cable screening, would it be highly likely that this is a noise issue coming from the lack of screened cable in my setup?

This is how my conversion looks - some advice greatly appreciated

14

General Mach Discussion / Re: spindle issues

« on: June 16, 2013, 05:15:00 AM »

Ah didnt think of the pulley setup, my current setup is
min - 0
max - 2600
ratio - 1

Think maybe it should be
min - 0
max - 2600
ration - 10:1 - so min would be 10% of the max 260

Regards to the 24v switching I've found this ssr switching board, controlled by an output signal.
http://www.iacs.co.uk/datasheets/1CH%20SSR%20Datasheet.pdf
24v dc in 24v dc out

15

General Mach Discussion / spindle issues

« on: June 15, 2013, 04:48:21 AM »

Have just setup my new parker ssd650 inveter drive,

1st issue -
When I input a m3s2500 the 0-10v output is 9.90v (not a prob for max spd), but anything less than s2340 then the 0-10v reads 0v and the obv the spindle wont turn, I have tried all manor of setups in motor tuning but to no luck.

I have how ever connected the 0-10v output to a pot then to the inverter and when 0-10v is at max I can control the spindle spd from o-s2500 via the pot, but obv mach3 spindle dro only reads s2500. Any thoughts as to why I cant get any less than s2340 through mach?

2nd issues -
In order to use 0-10v input on the inverter, the inverter still requires a signal to turn the spindle on, but with this inverter that is by the means of a 24v signal, is there any way I can use the spindle on signal from my sp4dc board to activate a switch connected to a 24v circuit?

Any thoughts greatly appreciated

16

General Mach Discussion / Re: Blown spindle inverter/controller

« on: June 11, 2013, 07:09:57 PM »

yes, but why would you ?

wire in a potentiometer?? to get more of a manual control of the spindle, obv you can tweek the spindle speed via mach but, to have the ability to fine tune the spindle manually via a dial seems a logical option,  but as yet I don't know if I want that in my setup. I'm just going through some online manuals regarding the wiring up of inverter drives, am looking at the parker ssd650, as the stepper drivers are parker thought might as well keep to the same make, this is the manual -  http://www.inverterdrive.com/file/Parker-SSD-650-Easy-Start-Guide, section 10 shows how to wire up a potentiometer and reading between the lines how to wire mach into this drive, I'm thinking that using mach as the potentiometer then my 0v to input 1 and speed ref signal (10v) to input 2 (AIN1), the spindle will only go in cw direction but that's ok.

17

General Mach Discussion / Re: Blown spindle inverter/controller

« on: June 11, 2013, 06:47:58 PM »

Ah ok, yeah as before the max rpm was 2500 when programmed through the original control, even though motor states 1400 rpm.

If I wire in a potentiometer to the new drive, is it correct that, that will make mach3 redundant for spindle control?

18

General Mach Discussion / Re: Blown spindle inverter/controller

« on: June 11, 2013, 03:26:25 PM »

Blown capacitors, resistors and power transistors...... it's ruined,

Angel tech, what is the relevance of setting up the inverter frequency to 100hz, when the motor is only 50hz?

19

General Mach Discussion / Blown spindle inverter/controller

« on: June 06, 2013, 06:56:37 PM »

Almost at the final hurdle and after finally sorting out the connections and getting my spindle turning correctly ..... the old spindle drive inverter/controller has given up in a puff of smoke, well it was nearly 30yrs old!!. Not yet sure how much damage has been done and whether it can be repaired, as I will get it checked out. But if it is damaged beyond repair, can anyone else recommend a suitable single to 3 phase inverter/controller?

My motor spec is as follows -

MAKE - ASEA
3Phase - 50hz IEC34 IP54
MT71B-F85-4 Class F
0.37Kw 380/380-420VY 1.3A
1400r/min 220/220-240V 2.3A
No.1470779 CoS 0.69

I have been recommended this one -

http://www.ebay.co.uk/itm/0-37kw-1-2HP-Single-Phase-In-Three-Phase-Out-Motor-Inverter-AC-Drive-NEW-/221180218416?pt=UK_BOI_Industrial_Automation_Control_ET&hash=item337f5e4c30

It does state -

Control Specification
Control Method
Voltage Vector
Energy Optimised
PWM Frequency 4…32 kHz (effective)
V / Hz Ratio Linear
Boost Yes
Stop Mode Coast / Ramp / DC Brake

Am I right to think that mach3 can control this via a pwm 5khz signal? via my diycnc sp4dc board

Any help will be very much appreciated

20

General Mach Discussion / Re: Best Pendant/MPG

« on: June 04, 2013, 07:22:45 PM »

I use the shuttle pro v2, and so far it seems pretty good and runs great with mach3, loads of buttons for customization through mach3, 2 jogs wheels - 1 for rapid jogging - 1 for increment jogging.