The AA drive is fancier but I guess both drives use PWM on a high frequency carrier. Is there something else I should have tried? AA wanted the drive and motor sent for them, but I later bought a different motor. Thank you
We like being here one of us ME can learn here from your channel, so close attention I will pay and thank you for sharing. We only have a table top TAIG CNC mill so i like to see our future options for a more diverse and powerful CNC milling machine.
How did you determine the motor voltage? I need to replace a bad drive on my PM-25MV but Precision Matthews is out of stock on the drive and is weeks away from getting a replacement. They won't say what the motor voltage is so I'm kind of screwed by them unless I can determine the stock motor voltage.
Hi Kent, I was running a DMM servo and Dyn4 drive on the spindle of a mini mill. It worked well but for one quirk. It’s been a while so some details may have been forgotten but, from what I recall, when starting the motor in reverse, it would still have to turn forward for just a bit. They said it was because it was a servo motor rather than a VFD, or something like that. It would rigid tap just fine running on a Centroid Acorn but it wasn’t quite right. After many back and forth emails with Michael and one of his techs, I just gave up trying to fix it. I’m hoping you can sort it all out as I still have the motor and drive and I’d like to use it on another project.
Fascinating comment! In response, I recorded a video of the servo starting, changing directions, and stopping. In the video I don't see this behavior, but I don't have a load on the servo which might invalidate the test. It's notable that the majority of overshoot seems to be the plywood base flexing. I should have clamped the servo to a more rigid base. Let me know what you think and I can do more testing. I hope to finally get the servo mounted in January... it has only taken six months to finally get to it :) Thank you have a Happy New Year! th-cam.com/video/O4xmOS1Pnjo/w-d-xo.html
Hi. I’ve been looking closely at Anaheim automations c7 ball screws. Can’t seem to find anyone who has used them. Have you by chance? If so what’s your opinion on them. Just seems like they are a step up from the cheap eBay ones by the price, yet more affordable then THK and other companies. I’d end up having my story told by Lester Holt if I bought the top tier screws. 😂
The only AA product that I have experience with is one BLDC drive. For ballscrews I start with Misumi. The products marked cost-efficient are generally price-wise OK. Best of success to you!
I don't see a point in buying separate drives and motors when the Teknic ClearPath motors can be had for _less_ than just the drive, have way more power output, and great low speed torque.
I've looked at the ClearPaths, for the mill and lathe. Here, I wanted to find a drop-in replacement of the drive only, for folks not able to replace the motor or access to more than standard wall current.
I see I'm a little late here but I'm curious to see how a DMM servo and drive works for you. It looks like you got a 1.8kw, I have a .75kw DMM servo I'm trying to get dialed in with my G0704 clone. I can't seem to get the RPM to work accurately with 0-10v control, and I'm curious to see how it works for you. Another user mentioned LinuxCNC has basically a spindle setup wizard that does that calibration for you but I'm using a Masso board which does not have that.
You're not late, I'm slow at these projects. I may have the same servo as you, one of the .75 kW models, medium inertia I think. Is there a load on your servo when testing speed? In LinuxCNC it's possible to create a polynomial or a piecewise function for mapping measured speed to required voltage. Perhaps your controller has this? Mounting the servo I have is probably three videos out. I need to order a few parts.
Kent VanderVelden Our servos are definitely similar, if not the same. Yours just looks bigger than mine from the picture. I do have a load although I’m going to try without one later this afternoon since I havent speed tested it like that in some time. Unfortunately my controller’s spindle settings are very basic and it may cause me to switch to a different controller in the future.
My servo has a brake that is pretty large. I had hoped it would work for a spindle lock for changing tools but the brake is not able to hold that much torque directly. My servo model is 86M-DHT-A6MKB
I like watching your videos because I'm learning from you.I have no idea about linux cnc that's too hard for me but I have two tips for you First: build an enclosure for the milling machine chips everywhere terrible always clean up Secondly your side milling looks terrible TTS and R8 are Tormach scrap (the next generation tormach has bt 30 that's the same as sk 30) Do you know what is sk 30 ?If the pm25 head is the same thing as optimum / G0704 / Holzmann ....... then a sk 30 spindle fits in. A German company sells a milling machine this one has a sk 30 spindle..... you can only buy the spindle as a replacement part ......look for a paulimot f 307 spindle and please continue to do so videos I wish you all the best
Hi Stephan, thank you for writing. This is the type of excellent comment everyone should want to receive: one that says what is being done well and what should be done better. An enclosure would help with clean up, which indeed gets bad, and potentially be slightly healthier with the coolant mist collecting on the sides of the enclosure. Next I'm replacing the spindle motor. After that maybe I'll copy the enclosure that Hidden Acres made from wood, hopefully this winter. It's tempting to at the same time add flood coolant. Maybe the side milling will improve with a more stable and heavier base. The head of the mill shakes with relatively heavy cuts and it's hard to tell if the base is shaking in unison, but the base certainly moves. A new base and maybe larger axes motors enabling tighter ways may both improve the side milling. Let me research the spindle. The US vendor might have an alternative. Again, thank you for the comments. Best wishes, Kent
I have a BF 20 with linear rails on Z and (a german word """"BF 20 Hüfthalter""""googel this! that's what makes the mill stable) I have almost the same machine as you.My spindle head is from wabeco f1210 so sk 30. TTS vs SK30 or BT30 The Result TTS is a Toy! But the biggest problem is that the original spindle like a pendulum swings. A heavier machine eat the swings........but ours is too easy. My spindle has V-ribbed belts (8 rip) quiet and does not swing.if my spindle is running at 5000 rpm i can talk to you.(max 7800rpm 1:1) I was looking for a spindle motor for a long time.(over 1 year) But what qualities Must be such an motor? Power,cheap and quickly interchangeable again. my solution: 3 phase motor 1.2 KW ( I removed the fan he is swinging) and a Danfoss 1.5 kw VFD. the trick that I get more power under 1000rpm I tell the VFD there is a 1.5 kw motor in it...... The 3 phase motor is so cheap......You can buy three 3 phase motors for one of your BLDC motors. "oh yes" I define power for a short time:I can drill 20mm/0,787402 inch at 1000 rpm in one go. if you want? tell me a forum! I can send you some pictures of my machine and milling products.
Hi Stephan, my previous mill had a three phase motor and servos on all axes and the power was scary at times. If you are willing to share, I would like to see your examples. My email and google photos address is kent.vandervelden @ gmail.com . Thank you, Kent
Does the controller use PWM on the output to the motor phases?
The AA drive is fancier but I guess both drives use PWM on a high frequency carrier. Is there something else I should have tried? AA wanted the drive and motor sent for them, but I later bought a different motor. Thank you
We like being here one of us ME can learn here from your channel, so close attention I will pay and thank you for sharing. We only have a table top TAIG CNC mill so i like to see our future options for a more diverse and powerful CNC milling machine.
Thank you, I'm glad to meet you. Let me know if I can help. Best of success
How did you determine the motor voltage? I need to replace a bad drive on my PM-25MV but Precision Matthews is out of stock on the drive and is weeks away from getting a replacement. They won't say what the motor voltage is so I'm kind of screwed by them unless I can determine the stock motor voltage.
Hi Kent,
I was running a DMM servo and Dyn4 drive on the spindle of a mini mill. It worked well but for one quirk. It’s been a while so some details may have been forgotten but, from what I recall, when starting the motor in reverse, it would still have to turn forward for just a bit. They said it was because it was a servo motor rather than a VFD, or something like that. It would rigid tap just fine running on a Centroid Acorn but it wasn’t quite right. After many back and forth emails with Michael and one of his techs, I just gave up trying to fix it. I’m hoping you can sort it all out as I still have the motor and drive and I’d like to use it on another project.
Fascinating comment! In response, I recorded a video of the servo starting, changing directions, and stopping. In the video I don't see this behavior, but I don't have a load on the servo which might invalidate the test. It's notable that the majority of overshoot seems to be the plywood base flexing. I should have clamped the servo to a more rigid base. Let me know what you think and I can do more testing. I hope to finally get the servo mounted in January... it has only taken six months to finally get to it :) Thank you have a Happy New Year!
th-cam.com/video/O4xmOS1Pnjo/w-d-xo.html
Hi. I’ve been looking closely at Anaheim automations c7 ball screws. Can’t seem to find anyone who has used them. Have you by chance? If so what’s your opinion on them. Just seems like they are a step up from the cheap eBay ones by the price, yet more affordable then THK and other companies. I’d end up having my story told by Lester Holt if I bought the top tier screws. 😂
The only AA product that I have experience with is one BLDC drive. For ballscrews I start with Misumi. The products marked cost-efficient are generally price-wise OK. Best of success to you!
If I had a dollar for every one of those servo amps or the stepper version I had to change!
Absolutely, there needs to be some reserve capacity. My first CNC mill had Gecko drives and the person who bought it blew out five or so.
I don't see a point in buying separate drives and motors when the Teknic ClearPath motors can be had for _less_ than just the drive, have way more power output, and great low speed torque.
I've looked at the ClearPaths, for the mill and lathe. Here, I wanted to find a drop-in replacement of the drive only, for folks not able to replace the motor or access to more than standard wall current.
I see I'm a little late here but I'm curious to see how a DMM servo and drive works for you. It looks like you got a 1.8kw, I have a .75kw DMM servo I'm trying to get dialed in with my G0704 clone. I can't seem to get the RPM to work accurately with 0-10v control, and I'm curious to see how it works for you. Another user mentioned LinuxCNC has basically a spindle setup wizard that does that calibration for you but I'm using a Masso board which does not have that.
You're not late, I'm slow at these projects. I may have the same servo as you, one of the .75 kW models, medium inertia I think. Is there a load on your servo when testing speed? In LinuxCNC it's possible to create a polynomial or a piecewise function for mapping measured speed to required voltage. Perhaps your controller has this? Mounting the servo I have is probably three videos out. I need to order a few parts.
Kent VanderVelden Our servos are definitely similar, if not the same. Yours just looks bigger than mine from the picture. I do have a load although I’m going to try without one later this afternoon since I havent speed tested it like that in some time. Unfortunately my controller’s spindle settings are very basic and it may cause me to switch to a different controller in the future.
My servo has a brake that is pretty large. I had hoped it would work for a spindle lock for changing tools but the brake is not able to hold that much torque directly. My servo model is 86M-DHT-A6MKB
I meant to also warn that the servo behavior may not work as expected if there is no load as there will be an inertia mismatch.
Kent VanderVelden Ah ok the brake explains it. I have an 86N-DHT which is the same except instead of a keyed shaft it has two flats for set screws.
I like watching your videos because I'm learning from you.I have no idea about linux cnc
that's too hard for me but I have two tips for you
First: build an enclosure for the milling machine
chips everywhere terrible always clean up
Secondly your side milling looks terrible
TTS and R8 are Tormach scrap (the next generation tormach has bt 30 that's the same as sk 30)
Do you know what is sk 30 ?If the pm25 head is the same thing as optimum / G0704 / Holzmann .......
then a sk 30 spindle fits in.
A German company sells a milling machine this one has a sk 30 spindle..... you can only buy the spindle as a replacement part ......look for a paulimot f 307 spindle
and please continue to do so videos
I wish you all the best
Hi Stephan, thank you for writing. This is the type of excellent comment everyone should want to receive: one that says what is being done well and what should be done better. An enclosure would help with clean up, which indeed gets bad, and potentially be slightly healthier with the coolant mist collecting on the sides of the enclosure. Next I'm replacing the spindle motor. After that maybe I'll copy the enclosure that Hidden Acres made from wood, hopefully this winter. It's tempting to at the same time add flood coolant. Maybe the side milling will improve with a more stable and heavier base. The head of the mill shakes with relatively heavy cuts and it's hard to tell if the base is shaking in unison, but the base certainly moves. A new base and maybe larger axes motors enabling tighter ways may both improve the side milling. Let me research the spindle. The US vendor might have an alternative. Again, thank you for the comments. Best wishes, Kent
I have a BF 20 with linear rails on Z and (a german word """"BF 20 Hüfthalter""""googel this! that's what makes the mill stable)
I have almost the same machine as you.My spindle head is from wabeco f1210 so sk 30.
TTS vs SK30 or BT30 The Result TTS is a Toy!
But the biggest problem is that the original spindle like a pendulum swings. A heavier machine eat the swings........but ours is too easy.
My spindle has V-ribbed belts (8 rip) quiet and does not swing.if my spindle is running at 5000 rpm i can talk to you.(max 7800rpm 1:1)
I was looking for a spindle motor for a long time.(over 1 year) But what qualities Must be such an motor?
Power,cheap and quickly interchangeable again.
my solution: 3 phase motor 1.2 KW ( I removed the fan he is swinging) and a Danfoss 1.5 kw VFD.
the trick that I get more power under 1000rpm I tell the VFD there is a 1.5 kw motor in it......
The 3 phase motor is so cheap......You can buy three 3 phase motors for one of your BLDC motors.
"oh yes" I define power for a short time:I can drill 20mm/0,787402 inch at 1000 rpm in one go.
if you want? tell me a forum! I can send you some pictures of my machine and milling products.
Hi Stephan, my previous mill had a three phase motor and servos on all axes and the power was scary at times. If you are willing to share, I would like to see your examples. My email and google photos address is kent.vandervelden @ gmail.com . Thank you, Kent