Messages

451

General Mach Discussion / Re: Bridgeport Knee Mill Conversion?

« on: February 17, 2018, 03:13:55 AM »

They look OK and P4 should be OK. I would only buy spindle bearings from a know manufacturer, i.e. not Chinese "German" bearings.
If these are overseas no-name bearings I would be very weary. Also verify against the numbers on your bearings. If you can find the specs of your original bearings that will give you a target to shoot for.

Mike

thanks, i'll verify the source.

452

General Mach Discussion / Re: MACH3PLASMA LIMIT SWITCHES FOR G540/PROMA

« on: February 16, 2018, 02:07:05 PM »

All you need to discover is the voltage when NOT cutting and the voltage ranges when it IS cutting - set the H-U setting to be higher than the voltages when cutting as it needs to see the change from piercing to cutting.

Sounds like your setting is on the border, it needs a bit more of gap.

453

General Mach Discussion / Re: Bridgeport Knee Mill Conversion?

« on: February 16, 2018, 08:24:44 AM »

Would this happen to be a suitable pair...

https://www.thebearingcompany.co.uk/product.php?id_product=7419

454

General Mach Discussion / Re: Bridgeport Knee Mill Conversion?

« on: February 16, 2018, 06:49:09 AM »

Thats a PITA, destructive removal

Will try some heat first, if not then its new bearing time if i can find a suitable part

455

General Mach Discussion / Re: Bridgeport Knee Mill Conversion?

« on: February 16, 2018, 03:53:31 AM »

Spindle is here

Looks good and apart from being a bit dusty the bearings might actually be worth refitting after a clean and lube, just to see if they will run, they feel ok.

So, with the QC30 nose, the locking collar is retained -can this be used to press off the bearings if heat fails??

456

General Mach Discussion / Re: MACH3PLASMA LIMIT SWITCHES FOR G540/PROMA

« on: February 16, 2018, 03:36:49 AM »

To find the off-load voltage or open-circuit voltage, just fire the torch into air - this only works if not is a pilot-arc or blowback-arc torch though, and do not do it for too long as it will melt the torch tip.

457

General Mach Discussion / Re: MACH3PLASMA LIMIT SWITCHES FOR G540/PROMA

« on: February 15, 2018, 03:51:01 PM »

Is your Z losing steps?

458

General Mach Discussion / Re: MACH3PLASMA LIMIT SWITCHES FOR G540/PROMA

« on: February 15, 2018, 03:10:59 PM »

Torch dive is usually a plasma thing not a Mach thing, you are close but this can be a pain.

Is the metal flat?
Is the return lead clamped to the metal not the table?
What plasma supply do you have?

459

General Mach Discussion / Re: MACH3PLASMA LIMIT SWITCHES FOR G540/PROMA

« on: February 15, 2018, 01:38:52 PM »

Yes! 160 ish seems about right.

That was the voltage displayed while doing a straight cut with the THC turned off in Mach3 over a reasonable distance like 200-300mm??

460

General Mach Discussion / Re: MACH3PLASMA LIMIT SWITCHES FOR G540/PROMA

« on: February 15, 2018, 01:30:43 PM »

Increase your voltage on the proma 2 or 3v and try again.

Did you do a test cut to establish the correct voltage?