'T - something and counting....'

[andy586]

What with my machine being very nearly finished, I thought I'd throw up a few pics for you to gawp and tut over.


I sacrificed rigidity of build for a simple build. I'd never tapped a hole or drilled a piece of metal before the start of this so I'm reasonably happy with what I ended up with. Obviously I'd do about 90% of it differently if starting over, but c'est la vie! I want to cut hardwood and a little plastic on it.


I haven't been able to give him muchtime recently (him or her...? I say the spindle makes it a him) as my mother was diagnosed with Stage IV cancer so its all hospitals and chemo at the minute but she said she would like to see it going before she does (got to love the gallows humour) so I am back to tinkering.


I've just finished replacing wires with shielded cable and doing the spindle cooling. All that is left now is to program the VFD. I went with a TECO L510 (after a Huanyang that blew up on me) but am struggling with the parameters.http://www.teco.com.sg/admin2/images...ual%20L510.pdf. If any kind soul could help me identify which parameters I should set to get the thing spinning, that would be much appreciated. I've got the standard Chinese 2.2kw water cooled spindle and am just looking to input the bare minimum of settings to get it going (i.e.the equivalent of the Huanyang settings in the set-up and advice thread).


Many thanks to everyone's help and advice so far. Would still be at the starting line without this site and its users.

[EddyCurrent]

If any kind soul could help me identify which parameters I should set to get the thing spinning, that would be much appreciated. I've got the standard Chinese 2.2kw water cooled spindle and am just looking to input the bare minimum of settings to get it going (i.e.the equivalent of the Huanyang settings in the set-up and advice thread).

Try these for a start, Huanyang on the left, yours on the right. Normally with a vfd you set the motor parameters first but in the case of your inverter the available settings seem oddly inadequate.
I don't know how you have the I/O wired so it may not run until you get those correct i.e. forward, run, stop, etc. Try using the keypad first.

PD013 .... 13-08
PD005 .... 00-12
PD007 .... 01-08
PD008 .... 01-01
PD011 .... 00-13
PD014 .... 00-14
PD015 .... 00-15
PD142 .... 02-01
PD144 .... 02-01

[andy586]

Many thanks for the reply Eddy...you are a true gent.

I tried the settings, it spun for around 30 secs and cut out with a motor overload fault (OL1). Tried playing around with the current and rpm and it gave a few revs and then gave me either motor overload or inverter overload (OL2). Then I thought about what you said about my VFD settings being inadequate...from that I looked at the settings that didn't have a an exact equivalent and worked it out...

The huanyang has an arbitrary v/f curve which you define with the min, intermediate and max frequencies and voltages. The teco has 6 predefined curves (which appear to be for 50 or 60 hz motors). I had to set it to the magical 7th curve which i then defined. Instead of a frequency vs voltage curve, it was a frequency vs voltage percentage. So I put in values that should mimic the curve one ends up with huanyang. So i went for:

'minimum frequency' =1.2 hz minimum voltage percentage (8/220*100) = 3.6%

'medium frequency 1' = 2.5 hz medium voltage 1 (15/220*100) = 6.8%
(equivalent to huanyang's 'intermediate frequency)

'medium frequency 2' ((400-2.5)/2)= 198.8 hz medium voltage 2 ((220-15)/2)= 102.5 v
(huanyang settings didn't have this second point on curve so i just used midpoints between 'intermediate' and 'maximum').

hit play and it spun.

as for the lack of 'number of poles' and one of those 400hz's, i guess that gets taken care of with the motor rated speed (i.e. the vfd needs the product of two variables rather than them individually....). i've set motor rated speed to 24000 rpm. I need to calibrate the display (with the motor synchronous speed?) (think it will be the 3,000 same as on huanyang) and check what rpm count i get but i think it should be ok.

so once again...many thanks for the reply...it gave me the confidence to press 'run' and that was most of the battle. i will report back once i've had another play and got it running at full speed and reading out 24,000. I hope this was not a big no-no to just go for the midpoint between intermediate and max and use that as my 'medium 2' for frequency and voltage percentage but i'm sure i'll soon find out.

cheers

[EddyCurrent]

You sound like you know what you're on about so I'm confident you will gt there.

[andy586]

cheers for the support.

i had another play around. i kept motor rated speed at 24,000rpm, and set the line speed display to 24,000 rpm. this gives me what i would expect (10 hz = 600rpm, 20 hz = 1200 rpm, 100hz = 6,000 rpm and so on) but once it gets above 10,512 rpm, the rpm readout starts getting a bit funny (goes back to zero and starts counting up again)(although spindle itself rpm carries on increasing nicely all way up to 400hz). so quirky rpm readout aside, i think its all working properly. i am jut using the frequency readout at the minute. i have ordered a cheap laser tachometer which should arrive on monday. then i can tell if i am where i'm supposed to be with regards to rpm and frequencies.

all good fun...

[EddyCurrent]

So do you have these values entered ?

12-03 = 400
12-04 = 1

From the manual;
"The max preset line value of 12-03 is equal to the Maximum output frequency of the motor."

I don't know if you are controlling the speed via G-code S instructions but if you are the next challenge is to get that in sync. too. For example if I use instructions M3 S20000 it starts the spindle rotating at 20000 RPM and the vfd display also reads 20000 RPM +or- about 20 RPM. As you say a cheap tacho is almost a must to check the speed.