AW: NEWBIE!!

Hi Peter!

thanks for the info! i guess Andrew knows more about the stuff than me. All i can add is that the stepper functionality in emc works quite well, but with high pulse rates (above 1khz) things began to get difficult in my experience. So the servo-Motor plan seems good to me.

I have built an emc machine with motors from Maxon http://www.maxon.ch/ . They are good.

Till

-----Ursprüngliche Nachricht-----
Von: emc-at-nist.gov [emc-at-nist.gov]Im Auftrag von Peter Barrett
Gesendet: Mittwoch, 5. Juni 2002 15:26
An: Multiple recipients of list
Betreff: Re: NEWBIE!!

Gday Till thanx for your interest!

I beleive EHPM stands for Electro-Hydraulic Pulse Motor.

I have got some encouraging information on these from Andrew Erwood, from whom I got the BDI disk.

They are basically a 5-phase stepper driving a hydraulic servo. His suggestion is to jettison the electrical part in favour of a small servo motor.

The Yasda is a 3-axis milling machine with 4-position indexing table. 5.5kW 32-speed spindle with 820mm x600mm x 500mm travel.

Motion is presently performed by Fanuc30 pretty old and clunky and costs a fortune in downtime and repair.

I have plenty of linux experience from ham radio so EMC seems not beyond possibility.

I just read Tim's page. VGOOD

At present BDI is installed on an old p100 that was laying around so we will be heading off to the computer auctions soon!!

cheers

Peter Barrett

----- Original Message -----

From: Till Franitza

To: Multiple recipients of list

Sent: Wednesday, June 05, 2002 2:21 PM

Subject: AW: NEWBIE!!

Hi Peter1

What is ehpm? What is Yasda YBM-80?

What demands most computing power is the stepper driver. The other ones need less. Try changing the time periods for the control tasks of the Motors. For most machines, slower rates will work, too.

Till

-----Ursprüngliche Nachricht-----
Von: emc-at-nist.gov [emc-at-nist.gov]Im Auftrag von Peter Barrett
Gesendet: Mittwoch, 5. Juni 2002 02:56
An: Multiple recipients of list
Betreff: NEWBIE!!

Hi from Perth WA

I have just got my BDI EMC and installed it in an old Pent 100MHz with 40M core and immediately noticed the following:

1) This machine spec seems tooooooo ssssllloooooowwww for the simulation....

2) The intention is to drive a Yasda YBM-80 with it, probably we will try some steppers first to push the EHPMs

3) Anyone else tried this on a 100MHz machine? Should I stop wasting me time and get revved up a bit?

cheers from

Peter Barrett