Messages

141

General Mach Discussion / OemButton 250 Help

« on: May 11, 2019, 01:00:53 PM »

I see button 250 is disable an axis movement but how is it re-enabled?

There is no opposing button code.

I am setting up my mill for turning and once positioned i want to disable the Y axis and C axis (knee) so they cant be accidentally moved or jogged

Unless there is a better way??

142

General Mach Discussion / Re: Mill or Turn?

« on: May 11, 2019, 08:15:30 AM »

At the moment i just have a QC tool post mounted on the quill using the bracket i made for a high-speed spindle (no longer used), the lathe is just a 5C shaft mounted with some deep-groove bearings in some 1" alu tooling plate blocks which i can clamp down to the table when needed. It has a 750W AC servo at 1:1 on it so plenty of power for a small shaft hopefully.

I can't do mill-turn because the quill is holding the tooling and a Bridgeport has no Z axis apart from the quill so i can't use a gang tooling bar at the same time. It's a bit of a limited lathe as such but hopefully will do what i wanted and means i don't have to try and shoe-horn another machine in

143

General Mach Discussion / Re: Mill or Turn?

« on: May 10, 2019, 12:08:07 PM »

Its a crap cable, signal was clean at the drive socket, changed the cable and plug and things seem better

Still can't use any i or d values in the pid but the p is now up around 12000 which is similar to other axes.

Adding any i makes it over shoot and creep back.

Ah well its a bit of a success i guess, thanks for the help so far.

144

General Mach Discussion / Re: Mill or Turn?

« on: May 10, 2019, 11:08:06 AM »

Two pics below, one is A channel the other is B channel, both crap in my view

Will now try and get signal as it comes from the drive socket but will take a while. 

This was captured with motor turning at 100rpm

145

General Mach Discussion / Re: Mill or Turn?

« on: May 10, 2019, 10:45:17 AM »

pn0016 & 17 set to 1

I have reached my conclusion this is encoder related.

Why?

Setting "open loop" in plugin config removes the encoder loop from the controller and i can request 0 to 3000rpm FWD and REV from Mach3 MDI input using the usual M3s3000 or M4s3000 and it works perfectly, it will also allow direct M4-M4 swaps and will slow down, stop, reverse and speed up ok.

So my conclusion so far is *********e encoder or bad signalling.

I'm digging the 'scope out to have a look-see whats coming out of the drive, not sure it will make much sense to me but i'm gussing to look out for a TTL level square-wave from ground to each A+ & A- with the two being inverted?

146

General Mach Discussion / Re: Mill or Turn?

« on: May 10, 2019, 10:04:24 AM »

Yes, signal goes Encoder -> Drive -> Controller

Will check those parameters now....

147

General Mach Discussion / Re: Mill or Turn?

« on: May 10, 2019, 08:24:24 AM »

Ok, changed DAC channel, no change at all so its not the controller.

Could it be encoder related?

Here's a short vid...
https://youtu.be/Sbmr4-Z9T8U

Shows what happens, what makes me think encoder is that it will run ok forwards and the following error stays high but stable, in reverse it will run away above a certain speed and the FE will keep rising.

Could a bad feedback be telling the controller to send more voltage hence the voltage being wrong giving me a false lead??

Slowly doing my head in now.

148

General Mach Discussion / Re: Mill or Turn?

« on: May 10, 2019, 06:13:06 AM »

Seems a tiny bit better but not working yet

The voltage from the CSMIO DAC is off-centre or not linear?

With the drive showing input signal voltage, i tested various speeds and its ok up to 1800rpm or 6.2v and works ok FWD or REV

At 1900rpm it goes out of balance, FWD runs ok at 6.46v but reverse jumps to 9.98v and runs flat out, when you remove the command it runs on for a second or two then stops suddenly.

No point tuning if i cant get this sorted.

Any ideas?

149

General Mach Discussion / Re: Mill or Turn?

« on: May 10, 2019, 02:40:30 AM »

have you tryed to set Pn146 to 0, this will Switch of the ramp Generator in the Driver (i think).

I'll be doing that this morning, few jobs to get out of way then i can get back on it

150

General Mach Discussion / Re: Mill or Turn?

« on: May 09, 2019, 02:35:45 PM »

In CS-Labs you just press the auto set zero and it stores the offset voltage.