Excellent news Algar, and timed nicely as post #500.
Looks like my two sets will be sent out in the first batch, since I don't need the custom pulleys or the plates!
🙂
Looks like my two sets will be sent out in the first batch, since I don't need the custom pulleys or the plates!
🙂
Merry Christmas and Happy Holiday. Here Santa delivery, some nice motors, and the Teres pulleys on the back.
Greg just confirmed that he completed the string pulleys. The tape pulleys were done already. His anodizer is shut down for a clean up and break until Jan 2.
Still no news from Killowatski for the plates. I guest his already gone for the holiday.
Things will start to move beginning of New Year, remember I'll be gone until January 7th.
I may post some more news between Christmas and New Year.
Drive safely and drink responsibly (but not at the same time
)
Bye...
Greg just confirmed that he completed the string pulleys. The tape pulleys were done already. His anodizer is shut down for a clean up and break until Jan 2.
Still no news from Killowatski for the plates. I guest his already gone for the holiday.
Things will start to move beginning of New Year, remember I'll be gone until January 7th.
I may post some more news between Christmas and New Year.
Drive safely and drink responsibly (but not at the same time
)Bye...
Attachments
I guess now is the wrong time to tell you that I think I've found a significant improvement to be made to the circuit.
One of the problems with I x R compensation is that the current supplied to the motor is discontinuous due to commutation ripple. The current feedback loop requires heavy filtering to remove the ripple before it is converted to supply voltage. This is accomplished by C5, 6, 7, 8, 9 and 10.
The filter acts as an integrator so there is a time lag between the change in current demand and the generation of the compensation voltage. The design of an I x R circuit is thus a compromise between the accuracy achieved and the time lag tolerated.
I have found a type of filter that allows more precision with less timelag. This is accomplished by using a phase correct high pass filter to pass only the commutation noise and then a unity gain differential amp which uses the unfiltered and filtered waveforms as input. The output of the amp is thus the difference between (DC + noise) and (noise) so it equals DC, but since its based on a phase correct high pass filter there is minimal timelag. I thought this was a new idea but it turns out to be a known type of elliptical filter.
Bad news is it's not simply an add-on, since it's an active filter it requires a re-design of the controller.
One of the problems with I x R compensation is that the current supplied to the motor is discontinuous due to commutation ripple. The current feedback loop requires heavy filtering to remove the ripple before it is converted to supply voltage. This is accomplished by C5, 6, 7, 8, 9 and 10.
The filter acts as an integrator so there is a time lag between the change in current demand and the generation of the compensation voltage. The design of an I x R circuit is thus a compromise between the accuracy achieved and the time lag tolerated.
I have found a type of filter that allows more precision with less timelag. This is accomplished by using a phase correct high pass filter to pass only the commutation noise and then a unity gain differential amp which uses the unfiltered and filtered waveforms as input. The output of the amp is thus the difference between (DC + noise) and (noise) so it equals DC, but since its based on a phase correct high pass filter there is minimal timelag. I thought this was a new idea but it turns out to be a known type of elliptical filter.
Bad news is it's not simply an add-on, since it's an active filter it requires a re-design of the controller.
Mark
I don't think anybody shoots here for ultimate in design and performance . As long as old circuit works on similar level to Hubner/Teres or Galibier/Redpoint or OL designs I think most will be satisfied. I know I will. But If you in the. meantime discover that some type of "add on" can be done ,don't hesitate to post it 😀
All the best and thanks for this design .
PS Maybe we should already think on this "Idler drive Thing" as a next in TT motor😉
I don't think anybody shoots here for ultimate in design and performance . As long as old circuit works on similar level to Hubner/Teres or Galibier/Redpoint or OL designs I think most will be satisfied. I know I will. But If you in the. meantime discover that some type of "add on" can be done ,don't hesitate to post it 😀
All the best and thanks for this design .
PS Maybe we should already think on this "Idler drive Thing" as a next in TT motor😉
UPDATE:
kilowattski was away on a business trip for the last two weeks, so that explain the late reply (as I said before, we have life out of the forum😉 )
His reply: "Sorry for the delay. I had a two week business trip. The tops are ready for shipment. They came out great! I will furnish you the box dimensions and weight so you can send the cash for shipping. I will post a picture later today on the forum."
kilowattski was away on a business trip for the last two weeks, so that explain the late reply (as I said before, we have life out of the forum😉 )
His reply: "Sorry for the delay. I had a two week business trip. The tops are ready for shipment. They came out great! I will furnish you the box dimensions and weight so you can send the cash for shipping. I will post a picture later today on the forum."
Hi. I checked my list and the first guys to received their kits (because they didin't order custom plate or pulleys) are:
Peter Daniel
Toaster
Sean Henderson
Xaq
PB
I'll send them email shorthly.
Some of you guys, like for example Tengsimon, have only motors/PCB and Parts but I'm still missing some switches that are backorder until mid-January. In this case, I go from top to bottom on my list, top been the first members to join the GB.
Peter Daniel
Toaster
Sean Henderson
Xaq
PB
I'll send them email shorthly.
Some of you guys, like for example Tengsimon, have only motors/PCB and Parts but I'm still missing some switches that are backorder until mid-January. In this case, I go from top to bottom on my list, top been the first members to join the GB.
Measured precisely the mylar tape lenght needed using the BIX pod. 48 inches should be adequate for all applications. This is the lenght I will offer as an option.
Last minute options will be:
Motor M2 Stainless Steel mounting screws, 6 or 8 mm lenght. The 6mm is the perfect lenght to use with the custom plate.The motor has 2.5mm deep mounting holes and the plate is 4mm thick, so the 6mm is perfect for the custom plate. 8mm may be used if you build a thicker mounting plate. The choice is yours.
Price 2$ per set
Mylar tape 1/2 inch width. I have holographic and black color (2 rolls holographic and 1 roll black). Lenght 48 inches. Price 5$.
Don't forget that I have to cut all these to lenght and pack them is small cardboard boxes. A lot of work...
You'll be contacted for the last minute option with the shipping email once each of your kit is ready for shipping.
Last minute options will be:
Motor M2 Stainless Steel mounting screws, 6 or 8 mm lenght. The 6mm is the perfect lenght to use with the custom plate.The motor has 2.5mm deep mounting holes and the plate is 4mm thick, so the 6mm is perfect for the custom plate. 8mm may be used if you build a thicker mounting plate. The choice is yours.
Price 2$ per set
Mylar tape 1/2 inch width. I have holographic and black color (2 rolls holographic and 1 roll black). Lenght 48 inches. Price 5$.
Don't forget that I have to cut all these to lenght and pack them is small cardboard boxes. A lot of work...
You'll be contacted for the last minute option with the shipping email once each of your kit is ready for shipping.
Gentlemen,
Here are a couple of Pics of the custom top plates. They came out very well indeed. They were machined out of solid 6061-T615 solid aluminum billets on a Haas CNC Mill. As soon as I get the ship to address I will ship them as they are already packed.
Here are a couple of Pics of the custom top plates. They came out very well indeed. They were machined out of solid 6061-T615 solid aluminum billets on a Haas CNC Mill. As soon as I get the ship to address I will ship them as they are already packed.
An externally hosted image should be here but it was not working when we last tested it.
An externally hosted image should be here but it was not working when we last tested it.
Wow kilowattski 😱 It is very nice indeed 😀
Thanks again for your hard and excellent work. I just sent you the shipping address.
UPDATES:
-Completed for good the four assembled PCB.
-Starting to pack the first kits for shipping. They will start to go tomorrow if I receive payment.
-The last batch of BIX pods is still not received. They were sent normal mail to save on shipping.
-All partial part Kits are completed and ready to go.
-All Full Parts Kits are all completed except for the DPDT Speed selection switch. It is the last back ordered part. I had just enough to use for the assembled PCB. They are scheduled for mid January. I won't get the pulleys before then anyway, so everything should fits just fine.
I'll use this time to send you email and with the shipping estimate and the last costs adjustments.
Thanks again for your hard and excellent work. I just sent you the shipping address.
UPDATES:
-Completed for good the four assembled PCB.
-Starting to pack the first kits for shipping. They will start to go tomorrow if I receive payment.
-The last batch of BIX pods is still not received. They were sent normal mail to save on shipping.
-All partial part Kits are completed and ready to go.
-All Full Parts Kits are all completed except for the DPDT Speed selection switch. It is the last back ordered part. I had just enough to use for the assembled PCB. They are scheduled for mid January. I won't get the pulleys before then anyway, so everything should fits just fine.
I'll use this time to send you email and with the shipping estimate and the last costs adjustments.
Hi Bas. What do you mean by a pair of screws? The set includes 6 screws. The custom plate has the 6 mounting holes, so...
Bye...
Bye...
Hi Sylvain, I'd like one set of each screw type and 2 lengths of holographic tape please.
thanks
Svein
thanks
Svein
I'll take two 6mm. set screws.
A question : how do you fix the motor mounting plate to the Pod? , I only see the motor mounting holes in it.
Patriz
A question : how do you fix the motor mounting plate to the Pod? , I only see the motor mounting holes in it.
Patriz
Hi Patriz, the pod has already 3 set screws to hold the top plate in place.
To all of you, no need to send your tape,screws request right now. I'll deal with that in the last email with cost adjustments and shipping cost, on an individual basis. I'll also confirmed your shipping address before shipping with all of you.
To all of you, no need to send your tape,screws request right now. I'll deal with that in the last email with cost adjustments and shipping cost, on an individual basis. I'll also confirmed your shipping address before shipping with all of you.