Messages

1401

General Mach Discussion / Re: Bridgeport Knee Mill Conversion?

« on: August 13, 2016, 03:00:36 AM »

Already there hood, here is a design i'm modifying / copying (pic below)

Its a H shape and my version will have a 20mm spigot that goes into an R8 collet in the spindle.

This part is only the top plate of the H, one plate would not be stable enough i think.

1402

General Mach Discussion / Re: Bridgeport Knee Mill Conversion?

« on: August 12, 2016, 10:02:44 AM »

Ok, so its been a quiet day in the day-job today but couldn't sneak home to work on the project as it was my watch as they say

Been playing with Fusion360 Sort of come up with a plan for the top plate of my dual-spindle adaptor for the mill. My thoughts are in the machining process...

Steps...
Spot the three holes in the middle,
Drill them through,
Counter-bore them,
Rough pocket out the two big holes,
Finish pass on them,

Questions so far,

should i rough the holes then finish with a mill tool or should I go for the boring head and bore-gauges/caliper ??
I was thinking to then flip over in the vise, mill the slot on the rear face, then flip back, bolt to table on scrap pads through the big holes and do the outer contour followed by the two small slots and a chamfer pass?
How to chamfer the rear face once contoured?

So far its been a blast, love the 360deg view

1403

General Mach Discussion / Re: Question about Motortuning

« on: August 12, 2016, 08:39:23 AM »

HI,

first thing i can suggest is to start a new thread for your problem, you will get better/more replies that way without upsetting the existing thread.

Next i would check the pulse length setting, maybe increase it a little, maybe try reversing the setting for "step low active" in ports and pins.

1404

General Mach Discussion / Re: Normally Open VS Normally Closed

« on: August 11, 2016, 01:47:29 PM »

I would simply send the carousel out, with a timer loop of maybe 2s - if it does not hit the out switch within that time then fault out of the macro with a message on screen.

No second chances - you never know why it did not hit the limit so not worth the risk of trying again, it won't fix itself

The rest of it is simple if-then loops etc and some friendly informative screen messages.

1405

General Mach Discussion / Re: Normally Open VS Normally Closed

« on: August 11, 2016, 10:16:53 AM »

I always try to wire my stuff with e-stop being N/C for reasons all have mentioned, all my input signals - buttons, homing, in your example the tool carousel position sensors I would always wire N/O so that a signal is provided to show intention - a button pressed, a proximity sensor in range of target, the tool carousel being in or out but not both or neither (needs logic here, OR gate i think).

Thats how i do stuff and it seems to make sense, rarely will a short circuit on an input be able to create a 24v signal, more likely short to chassis or just go open circuit so its a pretty safe system.

JMHO

1406

General Mach Discussion / Re: Normally Open VS Normally Closed

« on: August 11, 2016, 02:12:58 AM »

Industry standard safety relays like PILZ, PREVENTA et al, all use N/C switches and cannot be configured to use N/O switches on the safety monitoring side.

1407

General Mach Discussion / Re: Question about Motortuning

« on: August 10, 2016, 05:00:12 PM »

Which controller, i'm sure someone here has would have used a similar unit, any details?

25us seems long, even my cheap drives use pulse lengths from 1-5us ok

1408

General Mach Discussion / Re: Question about Motortuning

« on: August 10, 2016, 04:55:59 AM »

Why do you need to change?

Are you using a motion controller or the parallel port driver - many motion controllers will not use the pulse length settings.

1409

General Mach Discussion / Re: Bridgeport Knee Mill Conversion?

« on: August 08, 2016, 02:46:35 PM »

Ok, salvaged a bunch of din rail terminals, not proper grounding ones but will work nicely, looks a bit tidier too.

1410

General Mach Discussion / Re: Mori Seiki retrofit

« on: August 08, 2016, 02:42:12 PM »

If you have already reached a limit by not having cash for a CS-Labs controller, then i can see you are going to have big problems re-automating what appears to be a beast of a machine

I am currently £3000+ into a conversion on a simple Bridgeport Milling machine, was i warned not to do it - Yes, was i told it was costly - yes, was i told to cost it all up then double it - yes, the only advice I can offer you is that it WILL cost a lot of cash, no two ways round it.

Why did i do it? My main reason was to learn more about CNC, plus i enjoy the build process.