Hi peteeng,
The specs say the rated torque of my new spindle is 3.4Nm. I would guess that I could run a 12mm four flute tool in steel at 2500rpm or 94m/min surface speed.
This is a guess...
Type: Posts; User: joeavaerage
Hi peteeng,
The specs say the rated torque of my new spindle is 3.4Nm. I would guess that I could run a 12mm four flute tool in steel at 2500rpm or 94m/min surface speed.
This is a guess...
Hi peteeng,
I strongly agree. For a mill such as you envisage being able to cut steel is the goal, and in which case high torque at low(ish) speeds are required from your spindle.
An AC...
Hi,
a while back, a few days before Christmas, I bought a spindle off a chappy in Vietnam. He gave me a great price and Fedex'ed it to me in NZ. I forwarded an email
to Fedex from the seller...
Hi,
BS. Why do you suppose all the major machine manufacturers pay big dollars for top quality fixed mounts....because they like paying big dollars when cheap would do?
Its your money, and...
Hi,
I'm guessing from your name that you are in NZ? I am in Christchurch.
Craig
Hi,
these are a matched pair but universal ground, good but not great:
https://www.globalindustrial.com/p/super-precision-bearing-7205cydup4-universal-ground-duplex-25mm-bore-52mm-od
These...
Hi,
This looks to be the genuine article:
https://www.uberbearings.com/BK25-THK?setCurrencyId=2&sku=BK25-THK
Note particularly that the bearings are listed as '7205 in a DF' set. That is...
Hi,
this listing looks to be better, but I'm still dubious that they can sell them at $250USD with matched bearings:
https://us.misumi-ec.com/vona2/detail/221000095199/?HissuCode=BK25
Craig
Hi,
do yourself a favor and ring up your favorite bearing supplier and price a matched pair of 7005 P4 bearings.
I needed a set for my FK25 fixed mount. I got lucky and my local NSK stockist had...
Hi,
BS. A pair of matched P4 or P5 bearings can easily be hundreds of dollars. The bearings with a broader contact angle are more expensive again.
Either way they are critical to a machine....
Hi,
Commonly a ballscrew has two mounts, on at each end. One, the motor mount end, is called the 'fixed mount' in that it has two opposing angular contact bearings and those
bearings restrain...
Hi Lars,
your model is unrealistic. In particular you have constrained the base at six places to an 'infinitely stiff universe', and that is not realistic. The infinitely stiff mounting points...
Hi,
I am sort of surprised that you would consider ditching the Acorn on the basis of cost. You say $900 for a solution at includes a pendant, and I think to myself ......yes that sounds about...
Hi,
When I say I've 'breadboarded' my design, I bloody well mean it!! I have bought half a dozen of them on which are mounted servo drives, power components,the breakout board such as you've...
Hi,
yes, it has been a good discussion. It seems I have found someone whom agrees with me that a pendant can actually be very simple, it does not need all the bells and whistles. It seems many a...
Hi,
Have Centroid 'excluded' other pendants?. Mach is a commercial software product and they might have chosen to limit the access to their code so that manufacturers could
not make products...
Hi,
OR buy an Ethernet Smoothstepper. Has 51 Inputs and outputs. Compatible with Mach3 and Mach4.
Craig
Hi,
the pictures did not show up.
Yaskawa servos are very good but also very expensive. The servo needs to be matched to the drive, one without the other is just a joke.
I use Delta B2 series...
Hi,
either buy a Centroid pendant and be done with it.........or make a manual one.
I use Mach and have done for years. I used a VistaCNC P1A pendant for many years, and it too was USB connected....
Hi,
good luck. You may have noted that there seems to be plenty of second hand servos to choose from......but very few matching drives. Drives blow up and if they are too
expensive of difficult to...
Hi,
is the servo drive direct off-line? That is to say is it powered by 230VAC direct from the mains supply? Such servo drives are very VERY common but they have an issue
in that they 'pollute'...
Hi,
another possibility is that one of the microstepping switches has changed or failed, so the stepper now requires 1000 steps rather than the 200 you had originally programmed it.
Craig
Hi,
the servo I linked to is rated to 1500rpm and produces 19.1Nm torque continuous....but its maximum speed is 3000rpm.
At 3000 rpm it would have 19.1 x 1500/3000 =9.55Nm torque.
So this servo...
Hi,
I cannot find any information on it either. It does not look to be anything out of the ordinary so there must be drives for it somewhere.
Yaskawa is expensive, so no matter what you will pay...
Hi,
that sounds like you have a G51 active. Read up on G51. G51 scales one or more axes while a G50 cancels all scaling.
No, I disagree. Aside from anything else why does it just happen on...
Hi,
have you got a G51 Gcode scale active?.
Craig
Hi,
No.
Craig
Hi,
I think they are. 100mm thick with a 20mm gutter should be any amount stiff enough. I think you may be thinking that it has to be nnn N/um, but your estimate is too high.
It would be nice...
Hi,
a double start 5mm screw is the same as a single start 10mm screw. No need to change anything.
Craig
Hi Al,
I dont know what manual you are looking at but you are not correct.
The DM860H HAS a rectifier built in so you can use AC or DC. According to this pic up to 80VAC or up to 110VDC.
Craig