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Messages - Davek0974

1591
General Mach Discussion / Re: Bridgeport Knee Mill Conversion?
« on: June 24, 2016, 03:46:29 PM »
From a quick scan back through the thread it seems a 1.8kw 3000rpm AC servo at 1:1 drive should be ok if i keep back-gear.

Its about £350 so not too bad.

Larger ones may be better but then top speed seems to drop to 2500rpm or 2000rpm so would need a ratio increase.

I have a feeling based on usage that it really does not need max spindle power at all.

1592
General Mach Discussion / Re: Bridgeport Knee Mill Conversion?
« on: June 24, 2016, 03:07:10 PM »
Hiya Hood,

I'm not 100% certain now, I won't be doing anything until I have the frame for the Z axis machined up and assembled, it might just be that it "seems" too big at present, time will tell on that one.

I can't re-read the whole thread but my guess is you would throw in a servo and go direct drive?

As for the X & Y motor support plates, what thickness ally here - 10mm, 12mm, 15mm ??

1593
General Mach Discussion / Re: Bridgeport Knee Mill Conversion?
« on: June 24, 2016, 11:32:15 AM »
Hi all, back again :)

Wasted no time in getting out to the shop, started catching up on customer orders and did some work on the mill.

Seems I have ordered a screw set for the Z axis that is far too long - bum!
Will eBay that one for a few quid - its a 1605 zero backlash unit 360mm long if anyone wants it.

Then i discovered the motor bearings are half-shot, a bit of slack and grumble when spun. It will work ok but not sure having come this far if i should refit or replace with something else - options would be repair, fit a new vfd style motor with shaft extended or throw on a servo motor.

Views?

1594
General Mach Discussion / Re: Haas VF1 Conversion
« on: June 23, 2016, 01:49:22 PM »
Personally, I would always stick with familiarity ;)

1595
General Mach Discussion / Re: help with my VFD
« on: June 23, 2016, 01:31:04 PM »
Just going by the description, I would guess its a Huanyang 2.2kw inverter and 24k spindle??

There are plenty of setup hints on the web for this popular combo.

Need more info, is it blowing fuses, smoking, dead, lighting up at power-on, have you set the parameters in the drive??

1596
General Mach Discussion / Re: Why does my router "Clonk"?
« on: June 23, 2016, 01:24:16 PM »
I doubt it, steps per is relative only to distance travelled and the drive system mechanically.

So, travelling slowly it clonks, how slowly?

No clonks at rapid speeds or fast moves?

1597
General Mach Discussion / Re: Why does my router "Clonk"?
« on: June 23, 2016, 11:29:08 AM »
any chance of sticking a video clip up on youtube??

1598
General Mach Discussion / Re: help with torch height
« on: June 08, 2016, 03:10:05 PM »
Start from the beginning, you should be able to turn theca off and make good cuts, maybe only short 100-150mm if the plate is at all warped or not flat.

do you have the torch doing initial height sensing (IHS) at the start of each cut - it should move down, ohmic should would touch the plate, torch should stop moving, it should then lift to pierce height (as per book for material/consumables/power) then it should pierce and start cutting.

if the ohmic is not working i would fix that first as you really do need good IHS and pierce height or you will not succeed much further.

1599
General Mach Discussion / Re: Mach3 Home switch question
« on: June 08, 2016, 02:52:16 PM »
Try adding some debounce in general config i think, maybe 2500 and try again with the limits, if it works reduce the value and keep trying until it fails then up it a bit.

1600
General Mach Discussion / Re: help with torch height
« on: June 08, 2016, 02:49:27 PM »
Going to need more information  - do you have a torch height control? is it active? does it work without it?

what table, what plasma?