|Forum topic by restored||posted 02-01-2015 03:24 AM||2571 views||0 times favorited||31 replies|
02-01-2015 03:24 AM
I wish I new how to change the text so this would be easier to read. Why, because I need some much needed advice, opinions, and sharing of others knowledge. I hope I can condense also so I don’t go on for ever.
I have decided that I want to be able to turn at least a 20” bowl. Here are my issues. I believe my PM was built in the 70’s. P M built this model with a # of varying speeds. Not knowing but the basic things to look for in a nice hunk of iron, I wasn’t educated about the speeds. The lathe has a Reeves drive that runs smooth. The only issue is that at times if I have the speed at 1000rpms, the drive will walk faster and pick up RPM’s. It is something I have lived with, as the thought of pulling the motor and dealing with the spring and belt system again, and the fact that it doesn’t do it all the time, like I said I live with it. This machine weighs close to 800 lbs. When I put a close to 12” piece of green wood already rounded on the band saw, which isn’t balance perfect, the first 5 to 10 minutes of truing up is a real adventure. It will walk the whole lathe a foot and a half until I’m true. The 800 rpms x the centrifugal force due to the weight, increases the the actual energy immensely Of course I have the tail stock right up tight, and I typically do use a face place with screws. After hitting true, I keep the speed on 800. I have never experienced any type of bogging down.
I have a couple choices as to accomplish my dream of settling for a minimum swing of 16” on the inboard side. I have spent the last 4 to 5 months searching every day for a larger lathe, with the low speed and the increase swing. This hunk of iron is 50 years old and strong as an ox. I wonder how well a 16” Nova with the DVR speed control I desire will be a machine I will be passing on to my grandson.
My budget is around 2000.00 plus the proceeds from the powermatic, of which I’m asking 1200.00. Do i keep what I have, change the motor back to a 3 phase 220 motor, and purchase a VFD converter (I realize there is also rotary and static, of which I would love your opinions and knowledge) Will I be able to slow the speed to 200 rpms, with the reeves drive set at a low speed of 800, Will the converter override the Reeves drive, if I run something like a foot speed pedal. If I can do this I would then look at purchasing a heavy duty P M outboard turning rig and attach it to the 90 with welding, brackets or connectors of some type, so it can be removed. This part from P M is in the 500.00 range. Can I do this. Issues reeves drive , belt system, the clutch system on the reeves. I have thought about mounting the motor inside the cabinet. Can I find a belt the right width, and increased length. Am I dreaming and the engineering to do this is a crap shoot.
Do I wait continue to save my pennies until I can afford my dream lathe. A One Way 2436. I also love the Powermatic 2035. With the prize tag of 4000. 00 it is still out of my price range. I’m not whining, but my days of working for myself are done, as I’m had both my back and neck restored with rods and a total of 10 screws with fusions. I had a wonderful surgeon in Boston. I can stand up, and turn for 3hours at a time twice a day. I’m hooked. It’s great mental therapy and I’m grateful I have found it. I have a 1450 SF shop with nice machines. It was my retirement plans. Walking by the lathe without putting on it is difficult. I am allowed to make about 1000.00 a month beyond my disability. Which I need to do, and do it this my is my first choice.
Rework my 90, keep looking and buy used. Keep saving and buy a jet 16” OR similar. Does anyone have any input on grissly’s, Baliegh’s, Luguana, etc. Then any input on converters. If I do this should I increase the size of to accommodate other machines that i might purchase. This has been a way of survival. Jointers are the machine I can find at reasonable prices, clean up, adjust the beds if necessary, sharpen and reset the knives and resell. I have 3 6” ,, in my shop know. I need the help of electrician’s machinist, turners. Rotary vs. VFD, Do I need an additional motor to send the 3 phase power to a new 3 phase motor. Or does the drive or converter take the existing power and convert it to 3 phase. So far I’m sold on the VFD. It seems like it draws the power on a more consistent basis. Able to hold 60HZ. better than the rotary. I’m out of my league when I say this, but I have interpreted the 60 HZ to be the power the motor is putting out, and there can be a number of reasons that the motor is not able to maintain that, and bogs down. Please correct me and clarify. A voltage drop can cause this. I have seen a Makita skill saw turn at about 100 Rpm’s being on the end of 200 ft. of extension cords which were plugged into the last outlet on a circuit about 100 ft from the panel, and who knows how many interruptions in the line. I knew it would be long, may not even be accepted. But I do need as much help and experience opinions to help me decide what direction I should commit to and follow through. Thanks to all of you for reading.
Nothing is impossible to the man who doesn’t have to do it himself. rf