Super to hear from you!

I echo Tricia's comments about fibre supply and diameter control. When learning to make marled yarns, we tend to focus on the colour balance/imbalance. That does not leave much time for sorting out fibre that presents drafting challenges. Generally, yarns can only be as good as the fibre preparation will allow. You might want to try working with your best prepared fibre during this learning phase. Also, often students find it helpful to predraft their fibre prior to taking it to the wheel. Not so finely that it drifts away from you during spinning, but enough to facilitate the process. As always, a slower whorl (larger diameter) produces less twist and gives the spinner more time to arrange the fibres in the desired way.

Does this help?

Managing Fibre Diameters

First of all, thank you to Janet and Lindy for taking the plunge and posting. It is very exciting to feel that some conversation is starting.

My instant reaction to your question about managing your fibre diameters while spinning a marl was, practice. With more reflection, my suggestion would be to check to make sure your fibre supply is constant. Check to see if it is always one colour that is suddenly becoming thicker and/or thinner or does it vary from one colour to the other. If it is always one colour then you may be holding one colour a little bit more snugly than the other. You may need to make some minor hand adjustments to stabilize the flow of each colour. Slowing down your wheel and your treadling, may also help you to keep an eye on your fibre supply and the flow of colour into your drafting triangle.

Please let us know if this helps. Posting a picture of your efforts would be great as well.