Search found 107 matches

by MAX THE MILLER
Tue 31 Jan , 2017 12:37 pm
Forum: VR Milling - All Versions
Topic: Arc converted to straight lines.
Replies: 32
Views: 16891

Re: Arc converted to straight lines.

I started this thread more than two years ago. At that time I naively thought that as I'd bought a licence for VR Milling 5 it would be a properly supported product. This clearly isn't the case and this isn't the only problem I've raised which hasn't been fixed. There's been no new software release ...
by MAX THE MILLER
Sat 13 Feb , 2016 13:30 pm
Forum: Electronics
Topic: Brown Pestell VFD.
Replies: 0
Views: 5336

Brown Pestell VFD.

Is there anyone here who has a Brown Pestell VFD and would be able to check the value or colour code of resistor R66 for me. It's located next to IC7.

I'm repairing one of these units where R66 has gone very high in value and the colour code is indistinct.

Thanks, Max.
by MAX THE MILLER
Mon 08 Feb , 2016 22:38 pm
Forum: VR Milling - All Versions
Topic: VR Milling Version 5.63
Replies: 0
Views: 5110

VR Milling Version 5.63

I notice that Version 5.63 has appeared on the download page. I've downloaded it and it runs OK.

What problems are addressed by this version?

Thanks.
by MAX THE MILLER
Sun 29 Nov , 2015 14:06 pm
Forum: Orac
Topic: orac speed control
Replies: 3
Views: 4403

Re: orac speed control

I notice that the document linked to in post #2 only contains the even numbered pages from the original hardcopy document.

Is there any chance of a scan of the odd numbered pages?

Thanks.
by MAX THE MILLER
Fri 20 Nov , 2015 13:12 pm
Forum: Orac
Topic: Orac spindle drive problem
Replies: 21
Views: 7828

Re: Orac spindle drive problem

Colin.

I've sent you a Private Message (PM).
by MAX THE MILLER
Mon 16 Nov , 2015 14:23 pm
Forum: Orac
Topic: Orac spindle drive problem
Replies: 21
Views: 7828

Re: Orac spindle drive problem

What is the S2074 board?
I see it's the board with the + and - 12VDC supplies. Make sure these are present on the PC1951 before you start measuring other things or you'll be chasing your tail.
by MAX THE MILLER
Mon 16 Nov , 2015 11:37 am
Forum: Orac
Topic: Orac spindle drive problem
Replies: 21
Views: 7828

Re: Orac spindle drive problem

LF356's in round metal cans, as opposed to plastic Dual In Line (DIL) packages are available on UK ebay and from Farnell. You'll probably find that the actual device on your board has a suffix such as A, H or BH. Rather than probe the LF356 directly, with a risk of shorting its leads, it would be be...
by MAX THE MILLER
Fri 06 Nov , 2015 10:46 am
Forum: Orac
Topic: Orac spindle drive problem
Replies: 21
Views: 7828

Re: Orac spindle drive problem

There's a lot for me to think about there. Your break in Spain will give me a bit of breathing space. Following a cursory glance at your readings I've a couple of comments. 1. You mention using TB/2 as reference. It's obviously a typo, but I hope you meant TB1/2 (Terminal block 1, terminal 2). 2. Yo...
by MAX THE MILLER
Wed 04 Nov , 2015 11:07 am
Forum: Orac
Topic: Orac spindle drive problem
Replies: 21
Views: 7828

Re: Orac spindle drive problem

Here's how the circuit works:- A 6840 programmable timer on TI0.C module (S2044) generates a waveform, the characteristics of which vary with the spindle speed selected. The waveform turns a BC377 transistor on the same board on and off. The output of the BC377 alternately lights and extinguishes a ...
by MAX THE MILLER
Tue 03 Nov , 2015 9:12 am
Forum: Orac
Topic: Orac spindle drive problem
Replies: 21
Views: 7828

Re: Orac spindle drive problem

That's the diagram alright. I couldn't make head nor tail of it though, until I realised it's missing all the odd pages! I get the gist of it though. The relay on PC1951 does control the start and stop of the motor, so as long as you can start and stop the motor using M commands it's probably OK. Be...
by MAX THE MILLER
Mon 02 Nov , 2015 21:11 pm
Forum: Orac
Topic: Orac spindle drive problem
Replies: 21
Views: 7828

Re: Orac spindle drive problem

Your voltage reading are fine and you've proved that the board has all the necessary power supplies. 5.2V from the 7805 is OK, it's the fact that it's stable that counts. I haven't worked out all the inputs to the board, but the outputs all go to the Spindle Speed Controller board which I believe ha...
by MAX THE MILLER
Mon 02 Nov , 2015 11:37 am
Forum: Orac
Topic: Orac spindle drive problem
Replies: 21
Views: 7828

Re: Orac spindle drive problem

I've traced the power wiring back to the regulator board. The two supplies are +12V and -12V.
by MAX THE MILLER
Mon 02 Nov , 2015 11:01 am
Forum: Orac
Topic: Orac spindle drive problem
Replies: 21
Views: 7828

Re: Orac spindle drive problem

I have located the drawing. I'll have to work out how it interfaces with the other circuit boards. It would be useful to check the power supply voltages on the board with a meter. Between terminals 2 and 3 of Terminal Block 1. Between terminals 2 and 1 of TB1. Between terminal 2 of TB1 and the outpu...
by MAX THE MILLER
Sun 01 Nov , 2015 19:01 pm
Forum: Orac
Topic: Orac spindle drive problem
Replies: 21
Views: 7828

Re: Orac spindle drive problem

I'm not an expert where Orac electronics are concerned, but I do have an electronics background. If the zener is functioning correctly you should be able to measure 10 VDC across it. If this is not the case, then assuming the diode is not short-circuit, which seems unlikely as it's a replacement, yo...
by MAX THE MILLER
Sun 25 Oct , 2015 16:55 pm
Forum: VR Milling - All Versions
Topic: Arc converted to straight lines.
Replies: 32
Views: 16891

Re: Arc converted to straight lines.

Auto Sketch can create .eps files, but I can't find a way of importing them into VR Milling. The VR Milling help file only mentions importing .dxf and .dwg files. Auto sketch won't allow the .dxf file to be exploded. I notice that the way VR Milling handles arcs has changed during the time I've been...
by MAX THE MILLER
Thu 22 Oct , 2015 16:08 pm
Forum: VR Milling - All Versions
Topic: Will VR Milling 5 run on Windows 10
Replies: 11
Views: 6891

Re: Will VR Milling 5 run on Windows 10

2D and 3D work fine and I can "run" a .fnc file within them. Post Processor is fine too and generates a .gnc file. The PC in question has NEVER been used to actually control a machine. It's only used to import .dxf files, check the GCode generated, edit as required, and run simulations. Until 15 Sep...
by MAX THE MILLER
Wed 21 Oct , 2015 13:45 pm
Forum: VR Milling - All Versions
Topic: Will VR Milling 5 run on Windows 10
Replies: 11
Views: 6891

Re: Will VR Milling 5 run on Windows 10

I don't think the fault is with the video card, as it worked with VR Milling until the PC's OS was upgraded from W7 to W10. The drivers are Microsoft's own and are the latest version. Intel, who made the card, have different drivers, but these are only for W7. They can't be loaded on a W10 machine a...
by MAX THE MILLER
Tue 20 Oct , 2015 13:21 pm
Forum: VR Milling - All Versions
Topic: Will VR Milling 5 run on Windows 10
Replies: 11
Views: 6891

Re: Will VR Milling 5 run on Windows 10

Tried that and got the message:-

This demo requires the OES_texture_float extension
by MAX THE MILLER
Tue 20 Oct , 2015 11:37 am
Forum: VR Milling - All Versions
Topic: Will VR Milling 5 run on Windows 10
Replies: 11
Views: 6891

Re: Will VR Milling 5 run on Windows 10

With Windows 10 the program opens normally and it is possible to change settings etc. If the "VR Machine" button is clicked the machine homing window appears followed by the graphic showing the machine. Immediately after this the error message appears and the program locks up. No .fnc file needs to ...
by MAX THE MILLER
Mon 19 Oct , 2015 15:11 pm
Forum: VR Milling - All Versions
Topic: Will VR Milling 5 run on Windows 10
Replies: 11
Views: 6891

Re: Will VR Milling 5 run on Windows 10

Thanks for the quick response. The graphics card is:- Card: Intel(R) G45/G43 Express Chipset (Microsoft Corporation - WDDM 1.1) Having googled this I found that only Windows XP and Windows 7 drivers are available for it and there's no intention to develop a Windows 10 driver. Strange then that the P...