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It is to small. You need something in the 1.5 kw range to be happy.
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Since converting my X3 mill to CNC I've been happy with how it works in general with the exception of the spindle motor/gearbox. I've been looking for some time at the different alternatives around. I like the idea of using a servo motor with driver in place of the standard 600W brushed motor and doing a direct belt drive to the spindle. I have a possible candidate for the transplant but, I would like some advice from some more experienced users if it will be suitable power wise and if it's possible to connect this controller to Mach 3 for speed/direction control. I would probably drive this 1:1 for general use and maybe have a multiple pulleys to gear it up for high speed work. Any input appreciated.
The specs are:
SERVO PACK
SGDA-08AP SERVO PACK-750W
SERVO PACK INPUTVOLTAGE:200V~230V 1-PHASE
CONTROL : POSITION, TORQUE, SPEED ETC...
SUPPORT : CW/CCW, PULSE(CLK)/DIR INPUTS(POSITON CONTROL ONLY)
YASKAWA ELECTRIC CORPORATION JAPAN
MOTOR
SGM-08A312 MOTOR-750W
2.39Nm, 3000 RPM ,
YASKAWA ELECTRIC CORPORATION JAPAN
The ebay listing
It is to small. You need something in the 1.5 kw range to be happy.
Unfortunately I think you are correct. I found a few in the 1.5KW range but they are all over $1000.00. I was trying to keep it under $800.00 if possible but it looks like I'm dreaming. Back to bargain hunting now. Thanks for your reply.Originally Posted by mmprestine
Why do you'll think the 750W motor is too small if the original X3 motor is only 600W?
I was also thinking of doing an AC servo conversion so I could do some rigid tapping. This ebay 750W motor looks like a good deal since I was eying a similar 750W AC servo motor/controller from Keling for $700.
Danh
Danh,
That particular servo I have since found out that it will only work for direction control and not speed. That seller has another similar servo that does.
I'm still looking too for a servo/BLDC solution. I believe that the Samutang BLDC motor contoller package that Keling was selling has now had the controller low torque at low RPM issues sorted out now. I have been waiting for Keling to post any news to confirm it.
Maggs,
The 750W AC servo motor/controller from Keling appears to do position and speed control. Looks like you can program it to respond to step/direction signals which makes for easy interfacing with Mach3. This is not the same as the BLDC motor/controller you are referring too.
AC Servo Motors
I was looking at the AC servos from Automation Direct but it is just a relabel of the Delta brand servo motor\controller family. If you go to the Delta website, they appear to have some nice software for setting up the controllers. I was asking John from Keling about the shaft/key size of the motor to see what mods would be necessary for the X3 mill. Probably need a new pulley or a mod of the existing pulley plus some new motor mounts.
Danh
DanH,
The BLDC motor/controller I was referring to is currently not listed on Keling's site. They must of removed it because of the issues with the original unit. I know from talking with the manufacturer (Samutang) that Keling do in fact have the updated units but, I guess Keling is testing it out thoroughly before listing it for sale again. They were much cheaper than the servo. Around $500 if I remember correctly and that was for the motor, controller and a digital LCD RPM display.
Hopefully Keling will let us know soon how testing is progressing if at all.
Based on a conversation I had with Keling today, Sangmutan is not in business any longer and have dumped the manufactring onto a different company. John told me that he is not comfortable buying them again from the new company due to a large order they required When he was overseas last month visiting the facility he said he hasn't seen any real production to this point.
The ones that got the updated controller should count themselves lucky, I got 2 very large paperweights.
He is on vacation as of today through the 23rd so I don't expect any more replies from now till then. I am too looking for a replacement for that Sangmutan set that I have, and looking at the Delta 1kw kit he has. I am 99 percent certain that I will own one before the end of the year and do some thorough testing before I say anything about it.
Last time when I started talking about the Sangmutan, I spent more time on the electronics and speed controls. Then I got burned by the torque issues. I didn't have the 1100w model to install before I listed info on the 2200w model which my lathe wasn't ready for yet. This caused alot of interest, but the problems with the kit quickly became apparent.
You could use the 750watt system but the performance will be subpar. I have this combo and a X3 and can tell you the torque is not enough. Heck I got 3 of them sitting here want to buy one?
CJDavis618,
Any idea what the voltage of the BLDC motors are? Perhaps you can us a cheap controller like this BAC-0282P in the 48v range? Get a 48Vdc/16amp supply and it should work. For $59 bucks it might be worth trying. Go to the BLDC motors and scroll to the bottom of the page.
Matt
I wish that would work. These Motors from Sangmutan use a 300vDc controller.
Please keep us updated if you get the 1000W AC servo/controller ($1000, ouch!). The controller interface looks like it will also take a 0-10V signal for speed control which would make it compatible with the cnc4pc boards and Mach3.
Mmprestine,
Which 750W system did you get? Is this the 0.75kw Delta AC servo on the Keling site? Looks like the 1000w Delta AC servo has 2.5x the stall torque of the 750W system. I'm thinking I would probably get the 1000W now.
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