Re: Using a servo motor as a power feed
typically servo motors are used in CNC bridgeports, so i dont think it is a stretch.? Many videos about it online. some even use window motors from autos.? ?plus a simple controller would be all you need
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Re: Recieved My Bridgeport Today
Or, you can be OCD like myself. and purchase your own truck to move your mill (s)
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Re: Recieved My Bridgeport Today
Hey MIKE , it can't hurt to use the recommended caution suggested. I include my *condensed* display of transport.
A big part of "Heads Down" is clearance. Indeed as these - dated - pics show , it won't fit easily through a 7 foot high Garage Door.Not much better in the 8ft. high doors either.
This evolution was a couple YEARS after I bought this machine. I had - mostly - finished my "Shop" and it was time to MOVE the MILL !
The same Driver and Truck transported the MILL about 12 miles before. He only billed me for the "Hook Charge" for this effort. $35 bucks? well spent ! ?
The mill is rolling on 1&1/4" Stainless Rods. Very easy on the smooth NEW floor of the Shop, the " BARN FLOOR " while rock solid was a victim of.... "Drunks & the WEATHER" !? It suffered a *WASHED Surface* .? Poured right before a rain storm with no cover ever even thought about. So the "No Slip" floor was a mere accident. This was my neighbor's report 10 years after the fact.?
I don't truly recall moving the head ! But I think I just "PICKED IT UP" with the left arm and worked the ratchet with the right? ? ???
But alas the WAS 26 years ago.
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Re: Recieved My Bridgeport Today
Thanks for the input everyone, a two person operation it will be.
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Re: Recieved My Bridgeport Today
Agreed - absolutely do - it depends on the strength of your single arm of course, but on the few times I've had to do it I treated it as a two-person job, one to lift/push on the head and one to turn the screw!
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On 08/04/2025 12:09, aribert2 via groups.io wrote: "Whatever you do DO NOT use worm on its own, you may well strip it. Use a combination of other support and the worm until it gets to 45 degree"
Heed this caution.
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Re: Recieved My Bridgeport Today
"Whatever you do DO NOT use worm on its own, you may well strip it. Use a combination of other support and the worm until it gets to 45 degree"
Heed this caution.
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Re: Recieved My Bridgeport Today
Whatever you do DO NOT use worm on its own, you may well strip it. Use a combination of other support and the worm until it gets to 45 degree then you can use the worm on its own. Hope this helps
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On 8 Apr 2025, at 04:39, John Fraser via groups.io <johnfraser98077@...> wrote:
? You will need to crank it up with the worm, unless that¡¯s broken, which can happen if you try to crank it without loosening the 4 bolts.?
if the worm turns freely, it¡¯s broken. If not, use it. It will have a good bit of backlash.?
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Re: Recieved My Bridgeport Today
You will need to crank it up with the worm, unless that¡¯s broken, which can happen if you try to crank it without loosening the 4 bolts.?
if the worm turns freely, it¡¯s broken. If not, use it. It will have a good bit of backlash.?
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Recieved My Bridgeport Today
Hi All, Recieved my new to me Bridgeport today, very happy with S&R Machines in Connecticut for a fine job on all the upgrades. They shipped it with the head turned down 90 degrees which makes sense. Just wanted to do a sanity check on the procedure for rotating it back up. I see the four bolts that need to be loosened and they warn that when the head is up, be careful to prevent it from free falling down. Do I use the tilt adjustment screw to crank it back up the full 180 degrees or can I use the hoist to lift it up? Thanks, Mike in Michigan
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Re: CNC and Phase converter
Yes I am in USA, CT. So yes two 110v "legs" make 220v or 110v to center [basically grd] for the 110v use. My machine came with a filter on the 110v ac for the controls, its on the receptacle on the ceiling, forgot all about it, out of site, out of mind. I will check it ! Interesting facts on VFD's set up and use. Thanks.
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Re: CNC and Phase converter
I have several of the cheap, $100 to $200 Vevor/eBay VFDs in the shop, running up to a 10HP motor off 220 single phase.
They all work OK. Worst issue so far was a loose connector in one of them.
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?The one suggestion I have is to buy it oversize for your motor. The VFD rating on these is max power, so any "jerk", etc. will likely overload it momentarily, and it will error out and shut down.
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Pete
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Re: CNC and Phase converter
I, too, have a variable speed machine.? The original VFD was a TECO but it went bad and I purchased something else from FactoryMation.? My VFD is kept at 60 Hz and I use the variable speed crank to change RPMs.? That way I don't lose any power.? I had tried a cheap Chinese one after the TECO failed but, among other things, the terminal connections were too small to take standard crimp-on connectors.
John Cooper
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Re: CNC and Phase converter
Thanks Dan Beeker, that is the kind of information I have been wondering about as I wait for my Bridgeport to get here.
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Re: CNC and Phase converter
Set your vfd up to run your motor at whatever speed the motor is rated at. Run your mill at Hi speed. Switch to lo when you need lower speed and/or higher torque. You will find it easier to turn the speed down using your vfd though you will lose some torque doing so. Assuming you have the original motor on your mill, if the motor runs for a long time at lower speeds using the vfd it may not get adequate cooling. I¡¯ve never run my mill long enough to detect any significant heating of my milk¡¯s motor but I rarely mill anything other than small angles or bars. What I like most about vfds is they have dynamic braking so you can quickly stop your mill and don¡¯t have to wait for it to coast down. Most modern vfds come with braking resistors so there¡¯s no wiring or mechanicking needed. Just set a few parameters in the vfd and you¡¯re good to go. I¡¯ve had Hitachi brand vfd on both my Bridgeport mill and 16¡± lathe for well over 10 years. They¡¯ve been real workhorses.
Dan
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On Mar 26, 2025, at 6:18?PM, seb fontana via groups.io <speedoo51@...> wrote:
? Any particular brand or model of? VFD? My machine is variable speed with Hi/Low so where would that be set if suing VFD? Thanks. Seb.
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Re: CNC and Phase converter
Any particular brand or model of? VFD? My machine is variable speed with Hi/Low so where would that be set if suing VFD? Thanks. Seb.
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Re: CNC and Phase converter
Are you sure this is not simply a noise/spike problem on the supplies? From the voltages you mention I'm thinking you may be in North America? I am not very familiar with detail of quite how the 120/240VAC systems are derived in non-commercial settings (other than it's very different to here in the UK!) but from what I could see from the installation in my apartment when I lived there for a while, it looked as if there was a center-tapped transformer across 240V with the 120v supplied from one end and the center-tap and 240 from both ends?
If so then it would be very possible that all manner of random voltage fluctuations and noise could be induced with loads being switched and it sounds like you may have a wiring loop too? Have you tried a good quality filter on the supply to the controller? Another option would be to derive the 120V for the controller from a 240/120v isolating transformer at the machine from the 240v - or perhaps both!
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On 23/03/2025 19:30, seb fontana via groups.io wrote: I have a CNC machine with 2hp, 3 Phase? 220v motor. I am using a 220v 1 to 3 phase converter. Some times when I turn motor on it will cause the cnc control to go into fault and lose position. I assume its some type of voltage or amp spike but don't know how to check. The motor gets power from the main panel [220v welder line] while the 110v cnc control is powered through remote 220v service panel that supplies the garage.
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Re: CNC and Phase converter
Try a power line filter on your 110v feed to the CNC controller. I have a CNC bridgeport?that has custom drives and I had similar issues in the past.?
I'm not certain on a VFD brand recommendation, I am trusting the machine supplier on that. I can respond better when I receive my machine and see the brand that they chose.
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Re: CNC and Phase converter
I'm not certain on a VFD brand recommendation, I am trusting the machine supplier on that. I can respond better when I receive my machine and see the brand that they chose.
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Re: CNC and Phase converter
Yes cnc but uses 110v single phase for controls and servo motors. Trac CNC 2, Southwestern Industries. What brand or model of VFD is recomended??
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Re: CNC and Phase converter
? I think this is a CNC machine.
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? The electronics may want three phase, and they won't be happy with what a VFD puts out. My old BOSS 5 Bridgeport uses one phase for each of the X,Y,Z motor drives, and powers them through a three phase transformer. Newer machines with smarter electronics may not. It runs OK on a rotary phase converter.
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Pete
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Marty
seb fontana